GLORIA

GEOMAR Library Ocean Research Information Access

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
Document type
Keywords
Publisher
Language
Years
  • 1
    facet.materialart.
    Unknown
    Natural variability or anthropogenically-induced variation? Insights from 15 years of multidisciplinary observations at the arctic marine LTER site HAUSGARTEN (2016)
    Elsevier
    In:  Ecological Indicators, 65 . pp. 89-102.
    Details
    Publication Date: 2019-02-01
    Description: Time-series studies of arctic marine ecosystems are rare. This is not surprising since polar regions are largely only accessible by means of expensive modern infrastructure and instrumentation. In 1999, the Alfred Wegener Institute, Helmholtz-Centre for Polar and Marine Research (AWI) established the LTER (Long-Term Ecological Research) observatory HAUSGARTEN crossing the Fram Strait at about 79° N. Multidisciplinary investigations covering all parts of the open-ocean ecosystem are carried out at a total of 21 permanent sampling sites in water depths ranging between 250 and 5500 m. From the outset, repeated sampling in the water column and at the deep seafloor during regular expeditions in summer months was complemented by continuous year-round sampling and sensing using autonomous instruments in anchored devices (i.e., moorings and free-falling systems). The central HAUSGARTEN station at 2500 m water depth in the eastern Fram Strait serves as an experimental area for unique biological in situ experiments at the seafloor, simulating various scenarios in changing environmental settings. Long-term ecological research at the HAUSGARTEN observatory revealed a number of interesting temporal trends in numerous biological variables from the pelagic system to the deep seafloor. Contrary to common intuition, the entire ecosystem responded exceptionally fast to environmental changes in the upper water column. Major variations were associated with a Warm-Water-Anomaly evident in surface waters in eastern parts of the Fram Strait between 2005 and 2008. However, even after 15 years of intense time-series work at HAUSGARTEN, we cannot yet predict with complete certainty whether these trends indicate lasting alterations due to anthropologically-induced global environmental changes of the system, or whether they reflect natural variability on multiyear time-scales, for example, in relation to decadal oscillatory atmospheric processes.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/j.ecolind.2015.10.001
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 2
    facet.materialart.
    Unknown
    Summertime plankton ecology in Fram Strait - a compilation of long- and short-term observations (2015)
    Norwegian Polar Institute
    In:  Polar Research, 34 (23349).
    Details
    Publication Date: 2019-07-10
    Description: Between Greenland and Spitsbergen, Fram Strait is a region where cold ice-covered Polar Water exits the Arctic Ocean with the East Greenland Current (EGC) and warm Atlantic Water enters the Arctic Ocean with the West Spitsbergen Current (WSC). In this compilation, we present two different data sets from plankton ecological observations in Fram Strait: (1) long-term measurements of satellite-derived (1998–2012) and in situ chlorophyll a (chl a) measurements (mainly summer cruises, 1991–2012) plus protist compositions (a station in WSC, eight summer cruises, 1998–2011); and (2) short-term measurements of a multidisciplinary approach that includes traditional plankton investigations, remote sensing, zooplankton, microbiological and molecular studies, and biogeochemical analyses carried out during two expeditions in June/July in the years 2010 and 2011. Both summer satellite-derived and in situ chl a concentrations showed slight trends towards higher values in the WSC since 1998 and 1991, respectively. In contrast, no trends were visible in the EGC. The protist composition in the WSC showed differences for the summer months: a dominance of diatoms was replaced by a dominance of Phaeocystis pouchetii and other small pico- and nanoplankton species. The observed differences in eastern Fram Strait were partially due to a warm anomaly in the WSC. Although changes associated with warmer water temperatures were observed, further long-term investigations are needed to distinguish between natural variability and climate change in Fram Strait. Results of two summer studies in 2010 and 2011 revealed the variability in plankton ecology in Fram Strait.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.3402/polar.v34.23349
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 3
    facet.materialart.
    Unknown
    Convoluted remote sensing reflectance obtained from spectral underwater upwelling radiance and in air solar downwelling irradiance measurements during POLARSTERN cruise ARK-XXVI/3 (PS78) (2018)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-03-16
    Keywords: Arctic Ocean; ARK-XXVI/3; DATE/TIME; DEPTH, water; Elevation of event; Event label; FRAM; FRontiers in Arctic marine Monitoring; Laptev Sea; Latitude of event; Longitude of event; Polarstern; PS78/216-2; PS78/226-2; PS78/227-3; PS78/230-3; PS78/235-3; PS78/242-2; PS78/245-4; PS78/259-2; PS78/262-2; PS78/265-2; PS78/270-3; PS78/272-1; PS78/276-2; PS78/280-2; PS78/300-2; PS78 TransArc; RAMSES; RAMSES-ACC-VIS hyperspectral radiometer and RAMSES-ARC hyperspectral radiometer, TriOS; RAMSES hyperspectral radiometer; Remote sensing reflectance at 350 nm; Remote sensing reflectance at 351 nm; Remote sensing reflectance at 352 nm; Remote sensing reflectance at 353 nm; Remote sensing reflectance at 354 nm; Remote sensing reflectance at 355 nm; Remote sensing reflectance at 356 nm; Remote sensing reflectance at 357 nm; Remote sensing reflectance at 358 nm; Remote sensing reflectance at 359 nm; Remote sensing reflectance at 360 nm; Remote sensing reflectance at 361 nm; Remote sensing reflectance at 362 nm; Remote sensing reflectance at 363 nm; Remote sensing reflectance at 364 nm; Remote sensing reflectance at 365 nm; Remote sensing reflectance at 366 nm; Remote sensing reflectance at 367 nm; Remote sensing reflectance at 368 nm; Remote sensing reflectance at 369 nm; Remote sensing reflectance at 370 nm; Remote sensing reflectance at 371 nm; Remote sensing reflectance at 372 nm; Remote sensing reflectance at 373 nm; Remote sensing reflectance at 374 nm; Remote sensing reflectance at 375 nm; Remote sensing reflectance at 376 nm; Remote sensing reflectance at 377 nm; Remote sensing reflectance at 378 nm; Remote sensing reflectance at 379 nm; Remote sensing reflectance at 380 nm; Remote sensing reflectance at 381 nm; Remote sensing reflectance at 382 nm; Remote sensing reflectance at 383 nm; Remote sensing reflectance at 384 nm; Remote sensing reflectance at 385 nm; Remote sensing reflectance at 386 nm; Remote sensing reflectance at 387 nm; Remote sensing reflectance at 388 nm; Remote sensing reflectance at 389 nm; Remote sensing reflectance at 390 nm; Remote sensing reflectance at 391 nm; Remote sensing reflectance at 392 nm; Remote sensing reflectance at 393 nm; Remote sensing reflectance at 394 nm; Remote sensing reflectance at 395 nm; Remote sensing reflectance at 396 nm; Remote sensing reflectance at 397 nm; Remote sensing reflectance at 398 nm; Remote sensing reflectance at 399 nm; Remote sensing reflectance at 400 nm; Remote sensing reflectance at 401 nm; Remote sensing reflectance at 402 nm; Remote sensing reflectance at 403 nm; Remote sensing reflectance at 404 nm; Remote sensing reflectance at 405 nm; Remote sensing reflectance at 406 nm; Remote sensing reflectance at 407 nm; Remote sensing reflectance at 408 nm; Remote sensing reflectance at 409 nm; Remote sensing reflectance at 410 nm; Remote sensing reflectance at 411 nm; Remote sensing reflectance at 412 nm; Remote sensing reflectance at 413 nm; Remote sensing reflectance at 414 nm; Remote sensing reflectance at 415 nm; Remote sensing reflectance at 416 nm; Remote sensing reflectance at 417 nm; Remote sensing reflectance at 418 nm; Remote sensing reflectance at 419 nm; Remote sensing reflectance at 420 nm; Remote sensing reflectance at 421 nm; Remote sensing reflectance at 422 nm; Remote sensing reflectance at 423 nm; Remote sensing reflectance at 424 nm; Remote sensing reflectance at 425 nm; Remote sensing reflectance at 426 nm; Remote sensing reflectance at 427 nm; Remote sensing reflectance at 428 nm; Remote sensing reflectance at 429 nm; Remote sensing reflectance at 430 nm; Remote sensing reflectance at 431 nm; Remote sensing reflectance at 432 nm; Remote sensing reflectance at 433 nm; Remote sensing reflectance at 434 nm; Remote sensing reflectance at 435 nm; Remote sensing reflectance at 436 nm; Remote sensing reflectance at 437 nm; Remote sensing reflectance at 438 nm; Remote sensing reflectance at 439 nm; Remote sensing reflectance at 440 nm; Remote sensing reflectance at 441 nm; Remote sensing reflectance at 442 nm; Remote sensing reflectance at 443 nm; Remote sensing reflectance at 444 nm; Remote sensing reflectance at 445 nm; Remote sensing reflectance at 446 nm; Remote sensing reflectance at 447 nm; Remote sensing reflectance at 448 nm; Remote sensing reflectance at 449 nm; Remote sensing reflectance at 450 nm; Remote sensing reflectance at 451 nm; Remote sensing reflectance at 452 nm; Remote sensing reflectance at 453 nm; Remote sensing reflectance at 454 nm; Remote sensing reflectance at 455 nm; Remote sensing reflectance at 456 nm; Remote sensing reflectance at 457 nm; Remote sensing reflectance at 458 nm; Remote sensing reflectance at 459 nm; Remote sensing reflectance at 460 nm; Remote sensing reflectance at 461 nm; Remote sensing reflectance at 462 nm; Remote sensing reflectance at 463 nm; Remote sensing reflectance at 464 nm; Remote sensing reflectance at 465 nm; Remote sensing reflectance at 466 nm; Remote sensing reflectance at 467 nm; Remote sensing reflectance at 468 nm; Remote sensing reflectance at 469 nm; Remote sensing reflectance at 470 nm; Remote sensing reflectance at 471 nm; Remote sensing reflectance at 472 nm; Remote sensing reflectance at 473 nm; Remote sensing reflectance at 474 nm; Remote sensing reflectance at 475 nm; Remote sensing reflectance at 476 nm; Remote sensing reflectance at 477 nm; Remote sensing reflectance at 478 nm; Remote sensing reflectance at 479 nm; Remote sensing reflectance at 480 nm; Remote sensing reflectance at 481 nm; Remote sensing reflectance at 482 nm; Remote sensing reflectance at 483 nm; Remote sensing reflectance at 484 nm; Remote sensing reflectance at 485 nm; Remote sensing reflectance at 486 nm; Remote sensing reflectance at 487 nm; Remote sensing reflectance at 488 nm; Remote sensing reflectance at 489 nm; Remote sensing reflectance at 490 nm; Remote sensing reflectance at 491 nm; Remote sensing reflectance at 492 nm; Remote sensing reflectance at 493 nm; Remote sensing reflectance at 494 nm; Remote sensing reflectance at 495 nm; Remote sensing reflectance at 496 nm; Remote sensing reflectance at 497 nm; Remote sensing reflectance at 498 nm; Remote sensing reflectance at 499 nm; Remote sensing reflectance at 500 nm; Remote sensing reflectance at 501 nm; Remote sensing reflectance at 502 nm; Remote sensing reflectance at 503 nm; Remote sensing reflectance at 504 nm; Remote sensing reflectance at 505 nm; Remote sensing reflectance at 506 nm; Remote sensing reflectance at 507 nm; Remote sensing reflectance at 508 nm; Remote sensing reflectance at 509 nm; Remote sensing reflectance at 510 nm; Remote sensing reflectance at 511 nm; Remote sensing reflectance at 512 nm; Remote sensing reflectance at 513 nm; Remote sensing reflectance at 514 nm; Remote sensing reflectance at 515 nm; Remote sensing reflectance at 516 nm; Remote sensing reflectance at 517 nm; Remote sensing reflectance at 518 nm; Remote sensing reflectance at 519 nm; Remote sensing reflectance at 520 nm; Remote sensing reflectance at 521 nm; Remote sensing reflectance at 522 nm; Remote sensing reflectance at 523 nm; Remote sensing reflectance at 524 nm; Remote sensing reflectance at 525 nm; Remote sensing reflectance at 526 nm; Remote sensing reflectance at 527 nm; Remote sensing reflectance at 528 nm; Remote sensing reflectance at 529 nm; Remote sensing reflectance at 530 nm; Remote sensing reflectance at 531 nm; Remote sensing reflectance at 532 nm; Remote sensing reflectance at 533 nm; Remote sensing reflectance at 534 nm; Remote sensing reflectance at 535 nm; Remote sensing reflectance at 536 nm; Remote sensing reflectance at 537 nm; Remote sensing reflectance at 538 nm; Remote sensing reflectance at 539 nm; Remote sensing reflectance at 540 nm; Remote sensing reflectance at 541 nm; Remote sensing reflectance at 542 nm; Remote sensing reflectance at 543 nm; Remote sensing reflectance at 544 nm; Remote sensing reflectance at 545 nm; Remote sensing reflectance at 546
    Type: Dataset
    Format: text/tab-separated-values, 6015 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 4
    facet.materialart.
    Unknown
    Remote sensing reflectance obtained from spectral underwater upwelling radiance and in air solar downwelling irradiance measurements during POLARSTERN cruise ARK-XXVI/3 (PS78) (2018)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-03-16
    Keywords: Arctic Ocean; ARK-XXVI/3; DATE/TIME; DEPTH, water; Elevation of event; Event label; FRAM; FRontiers in Arctic marine Monitoring; Laptev Sea; Latitude of event; Longitude of event; Polarstern; PS78/216-2; PS78/226-2; PS78/227-3; PS78/230-3; PS78/235-3; PS78/242-2; PS78/245-4; PS78/259-2; PS78/262-2; PS78/265-2; PS78/270-3; PS78/272-1; PS78/276-2; PS78/280-2; PS78/300-2; PS78 TransArc; RAMSES; RAMSES-ACC-VIS hyperspectral radiometer and RAMSES-ARC hyperspectral radiometer, TriOS; RAMSES hyperspectral radiometer; Remote sensing reflectance at 350 nm; Remote sensing reflectance at 351 nm; Remote sensing reflectance at 352 nm; Remote sensing reflectance at 353 nm; Remote sensing reflectance at 354 nm; Remote sensing reflectance at 355 nm; Remote sensing reflectance at 356 nm; Remote sensing reflectance at 357 nm; Remote sensing reflectance at 358 nm; Remote sensing reflectance at 359 nm; Remote sensing reflectance at 360 nm; Remote sensing reflectance at 361 nm; Remote sensing reflectance at 362 nm; Remote sensing reflectance at 363 nm; Remote sensing reflectance at 364 nm; Remote sensing reflectance at 365 nm; Remote sensing reflectance at 366 nm; Remote sensing reflectance at 367 nm; Remote sensing reflectance at 368 nm; Remote sensing reflectance at 369 nm; Remote sensing reflectance at 370 nm; Remote sensing reflectance at 371 nm; Remote sensing reflectance at 372 nm; Remote sensing reflectance at 373 nm; Remote sensing reflectance at 374 nm; Remote sensing reflectance at 375 nm; Remote sensing reflectance at 376 nm; Remote sensing reflectance at 377 nm; Remote sensing reflectance at 378 nm; Remote sensing reflectance at 379 nm; Remote sensing reflectance at 380 nm; Remote sensing reflectance at 381 nm; Remote sensing reflectance at 382 nm; Remote sensing reflectance at 383 nm; Remote sensing reflectance at 384 nm; Remote sensing reflectance at 385 nm; Remote sensing reflectance at 386 nm; Remote sensing reflectance at 387 nm; Remote sensing reflectance at 388 nm; Remote sensing reflectance at 389 nm; Remote sensing reflectance at 390 nm; Remote sensing reflectance at 391 nm; Remote sensing reflectance at 392 nm; Remote sensing reflectance at 393 nm; Remote sensing reflectance at 394 nm; Remote sensing reflectance at 395 nm; Remote sensing reflectance at 396 nm; Remote sensing reflectance at 397 nm; Remote sensing reflectance at 398 nm; Remote sensing reflectance at 399 nm; Remote sensing reflectance at 400 nm; Remote sensing reflectance at 401 nm; Remote sensing reflectance at 402 nm; Remote sensing reflectance at 403 nm; Remote sensing reflectance at 404 nm; Remote sensing reflectance at 405 nm; Remote sensing reflectance at 406 nm; Remote sensing reflectance at 407 nm; Remote sensing reflectance at 408 nm; Remote sensing reflectance at 409 nm; Remote sensing reflectance at 410 nm; Remote sensing reflectance at 411 nm; Remote sensing reflectance at 412 nm; Remote sensing reflectance at 413 nm; Remote sensing reflectance at 414 nm; Remote sensing reflectance at 415 nm; Remote sensing reflectance at 416 nm; Remote sensing reflectance at 417 nm; Remote sensing reflectance at 418 nm; Remote sensing reflectance at 419 nm; Remote sensing reflectance at 420 nm; Remote sensing reflectance at 421 nm; Remote sensing reflectance at 422 nm; Remote sensing reflectance at 423 nm; Remote sensing reflectance at 424 nm; Remote sensing reflectance at 425 nm; Remote sensing reflectance at 426 nm; Remote sensing reflectance at 427 nm; Remote sensing reflectance at 428 nm; Remote sensing reflectance at 429 nm; Remote sensing reflectance at 430 nm; Remote sensing reflectance at 431 nm; Remote sensing reflectance at 432 nm; Remote sensing reflectance at 433 nm; Remote sensing reflectance at 434 nm; Remote sensing reflectance at 435 nm; Remote sensing reflectance at 436 nm; Remote sensing reflectance at 437 nm; Remote sensing reflectance at 438 nm; Remote sensing reflectance at 439 nm; Remote sensing reflectance at 440 nm; Remote sensing reflectance at 441 nm; Remote sensing reflectance at 442 nm; Remote sensing reflectance at 443 nm; Remote sensing reflectance at 444 nm; Remote sensing reflectance at 445 nm; Remote sensing reflectance at 446 nm; Remote sensing reflectance at 447 nm; Remote sensing reflectance at 448 nm; Remote sensing reflectance at 449 nm; Remote sensing reflectance at 450 nm; Remote sensing reflectance at 451 nm; Remote sensing reflectance at 452 nm; Remote sensing reflectance at 453 nm; Remote sensing reflectance at 454 nm; Remote sensing reflectance at 455 nm; Remote sensing reflectance at 456 nm; Remote sensing reflectance at 457 nm; Remote sensing reflectance at 458 nm; Remote sensing reflectance at 459 nm; Remote sensing reflectance at 460 nm; Remote sensing reflectance at 461 nm; Remote sensing reflectance at 462 nm; Remote sensing reflectance at 463 nm; Remote sensing reflectance at 464 nm; Remote sensing reflectance at 465 nm; Remote sensing reflectance at 466 nm; Remote sensing reflectance at 467 nm; Remote sensing reflectance at 468 nm; Remote sensing reflectance at 469 nm; Remote sensing reflectance at 470 nm; Remote sensing reflectance at 471 nm; Remote sensing reflectance at 472 nm; Remote sensing reflectance at 473 nm; Remote sensing reflectance at 474 nm; Remote sensing reflectance at 475 nm; Remote sensing reflectance at 476 nm; Remote sensing reflectance at 477 nm; Remote sensing reflectance at 478 nm; Remote sensing reflectance at 479 nm; Remote sensing reflectance at 480 nm; Remote sensing reflectance at 481 nm; Remote sensing reflectance at 482 nm; Remote sensing reflectance at 483 nm; Remote sensing reflectance at 484 nm; Remote sensing reflectance at 485 nm; Remote sensing reflectance at 486 nm; Remote sensing reflectance at 487 nm; Remote sensing reflectance at 488 nm; Remote sensing reflectance at 489 nm; Remote sensing reflectance at 490 nm; Remote sensing reflectance at 491 nm; Remote sensing reflectance at 492 nm; Remote sensing reflectance at 493 nm; Remote sensing reflectance at 494 nm; Remote sensing reflectance at 495 nm; Remote sensing reflectance at 496 nm; Remote sensing reflectance at 497 nm; Remote sensing reflectance at 498 nm; Remote sensing reflectance at 499 nm; Remote sensing reflectance at 500 nm; Remote sensing reflectance at 501 nm; Remote sensing reflectance at 502 nm; Remote sensing reflectance at 503 nm; Remote sensing reflectance at 504 nm; Remote sensing reflectance at 505 nm; Remote sensing reflectance at 506 nm; Remote sensing reflectance at 507 nm; Remote sensing reflectance at 508 nm; Remote sensing reflectance at 509 nm; Remote sensing reflectance at 510 nm; Remote sensing reflectance at 511 nm; Remote sensing reflectance at 512 nm; Remote sensing reflectance at 513 nm; Remote sensing reflectance at 514 nm; Remote sensing reflectance at 515 nm; Remote sensing reflectance at 516 nm; Remote sensing reflectance at 517 nm; Remote sensing reflectance at 518 nm; Remote sensing reflectance at 519 nm; Remote sensing reflectance at 520 nm; Remote sensing reflectance at 521 nm; Remote sensing reflectance at 522 nm; Remote sensing reflectance at 523 nm; Remote sensing reflectance at 524 nm; Remote sensing reflectance at 525 nm; Remote sensing reflectance at 526 nm; Remote sensing reflectance at 527 nm; Remote sensing reflectance at 528 nm; Remote sensing reflectance at 529 nm; Remote sensing reflectance at 530 nm; Remote sensing reflectance at 531 nm; Remote sensing reflectance at 532 nm; Remote sensing reflectance at 533 nm; Remote sensing reflectance at 534 nm; Remote sensing reflectance at 535 nm; Remote sensing reflectance at 536 nm; Remote sensing reflectance at 537 nm; Remote sensing reflectance at 538 nm; Remote sensing reflectance at 539 nm; Remote sensing reflectance at 540 nm; Remote sensing reflectance at 541 nm; Remote sensing reflectance at 542 nm; Remote sensing reflectance at 543 nm; Remote sensing reflectance at 544 nm; Remote sensing reflectance at 545 nm; Remote sensing reflectance at 546
    Type: Dataset
    Format: text/tab-separated-values, 6015 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 5
    facet.materialart.
    Unknown
    Convoluted remote sensing reflectance obtained from spectral underwater upwelling radiance and solar downwelling irradiance measurements during POLARSTERN cruise ARK-XXVI/3 (PS78) (2018)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-03-16
    Keywords: Arctic Ocean; ARK-XXVI/3; DATE/TIME; DEPTH, water; Elevation of event; Event label; FRAM; FRontiers in Arctic marine Monitoring; Laptev Sea; Latitude of event; Longitude of event; Polarstern; PS78/216-2; PS78/218-3; PS78/224-3; PS78/226-2; PS78/227-3; PS78/230-3; PS78/235-3; PS78/242-2; PS78/245-4; PS78/259-2; PS78/262-2; PS78/265-2; PS78/270-3; PS78/272-1; PS78/276-2; PS78/280-2; PS78/300-2; PS78 TransArc; RAMSES; RAMSES-ACC-VIS hyperspectral radiometer and RAMSES-ARC hyperspectral radiometer, TriOS; RAMSES hyperspectral radiometer; Remote sensing reflectance at 350 nm; Remote sensing reflectance at 351 nm; Remote sensing reflectance at 352 nm; Remote sensing reflectance at 353 nm; Remote sensing reflectance at 354 nm; Remote sensing reflectance at 355 nm; Remote sensing reflectance at 356 nm; Remote sensing reflectance at 357 nm; Remote sensing reflectance at 358 nm; Remote sensing reflectance at 359 nm; Remote sensing reflectance at 360 nm; Remote sensing reflectance at 361 nm; Remote sensing reflectance at 362 nm; Remote sensing reflectance at 363 nm; Remote sensing reflectance at 364 nm; Remote sensing reflectance at 365 nm; Remote sensing reflectance at 366 nm; Remote sensing reflectance at 367 nm; Remote sensing reflectance at 368 nm; Remote sensing reflectance at 369 nm; Remote sensing reflectance at 370 nm; Remote sensing reflectance at 371 nm; Remote sensing reflectance at 372 nm; Remote sensing reflectance at 373 nm; Remote sensing reflectance at 374 nm; Remote sensing reflectance at 375 nm; Remote sensing reflectance at 376 nm; Remote sensing reflectance at 377 nm; Remote sensing reflectance at 378 nm; Remote sensing reflectance at 379 nm; Remote sensing reflectance at 380 nm; Remote sensing reflectance at 381 nm; Remote sensing reflectance at 382 nm; Remote sensing reflectance at 383 nm; Remote sensing reflectance at 384 nm; Remote sensing reflectance at 385 nm; Remote sensing reflectance at 386 nm; Remote sensing reflectance at 387 nm; Remote sensing reflectance at 388 nm; Remote sensing reflectance at 389 nm; Remote sensing reflectance at 390 nm; Remote sensing reflectance at 391 nm; Remote sensing reflectance at 392 nm; Remote sensing reflectance at 393 nm; Remote sensing reflectance at 394 nm; Remote sensing reflectance at 395 nm; Remote sensing reflectance at 396 nm; Remote sensing reflectance at 397 nm; Remote sensing reflectance at 398 nm; Remote sensing reflectance at 399 nm; Remote sensing reflectance at 400 nm; Remote sensing reflectance at 401 nm; Remote sensing reflectance at 402 nm; Remote sensing reflectance at 403 nm; Remote sensing reflectance at 404 nm; Remote sensing reflectance at 405 nm; Remote sensing reflectance at 406 nm; Remote sensing reflectance at 407 nm; Remote sensing reflectance at 408 nm; Remote sensing reflectance at 409 nm; Remote sensing reflectance at 410 nm; Remote sensing reflectance at 411 nm; Remote sensing reflectance at 412 nm; Remote sensing reflectance at 413 nm; Remote sensing reflectance at 414 nm; Remote sensing reflectance at 415 nm; Remote sensing reflectance at 416 nm; Remote sensing reflectance at 417 nm; Remote sensing reflectance at 418 nm; Remote sensing reflectance at 419 nm; Remote sensing reflectance at 420 nm; Remote sensing reflectance at 421 nm; Remote sensing reflectance at 422 nm; Remote sensing reflectance at 423 nm; Remote sensing reflectance at 424 nm; Remote sensing reflectance at 425 nm; Remote sensing reflectance at 426 nm; Remote sensing reflectance at 427 nm; Remote sensing reflectance at 428 nm; Remote sensing reflectance at 429 nm; Remote sensing reflectance at 430 nm; Remote sensing reflectance at 431 nm; Remote sensing reflectance at 432 nm; Remote sensing reflectance at 433 nm; Remote sensing reflectance at 434 nm; Remote sensing reflectance at 435 nm; Remote sensing reflectance at 436 nm; Remote sensing reflectance at 437 nm; Remote sensing reflectance at 438 nm; Remote sensing reflectance at 439 nm; Remote sensing reflectance at 440 nm; Remote sensing reflectance at 441 nm; Remote sensing reflectance at 442 nm; Remote sensing reflectance at 443 nm; Remote sensing reflectance at 444 nm; Remote sensing reflectance at 445 nm; Remote sensing reflectance at 446 nm; Remote sensing reflectance at 447 nm; Remote sensing reflectance at 448 nm; Remote sensing reflectance at 449 nm; Remote sensing reflectance at 450 nm; Remote sensing reflectance at 451 nm; Remote sensing reflectance at 452 nm; Remote sensing reflectance at 453 nm; Remote sensing reflectance at 454 nm; Remote sensing reflectance at 455 nm; Remote sensing reflectance at 456 nm; Remote sensing reflectance at 457 nm; Remote sensing reflectance at 458 nm; Remote sensing reflectance at 459 nm; Remote sensing reflectance at 460 nm; Remote sensing reflectance at 461 nm; Remote sensing reflectance at 462 nm; Remote sensing reflectance at 463 nm; Remote sensing reflectance at 464 nm; Remote sensing reflectance at 465 nm; Remote sensing reflectance at 466 nm; Remote sensing reflectance at 467 nm; Remote sensing reflectance at 468 nm; Remote sensing reflectance at 469 nm; Remote sensing reflectance at 470 nm; Remote sensing reflectance at 471 nm; Remote sensing reflectance at 472 nm; Remote sensing reflectance at 473 nm; Remote sensing reflectance at 474 nm; Remote sensing reflectance at 475 nm; Remote sensing reflectance at 476 nm; Remote sensing reflectance at 477 nm; Remote sensing reflectance at 478 nm; Remote sensing reflectance at 479 nm; Remote sensing reflectance at 480 nm; Remote sensing reflectance at 481 nm; Remote sensing reflectance at 482 nm; Remote sensing reflectance at 483 nm; Remote sensing reflectance at 484 nm; Remote sensing reflectance at 485 nm; Remote sensing reflectance at 486 nm; Remote sensing reflectance at 487 nm; Remote sensing reflectance at 488 nm; Remote sensing reflectance at 489 nm; Remote sensing reflectance at 490 nm; Remote sensing reflectance at 491 nm; Remote sensing reflectance at 492 nm; Remote sensing reflectance at 493 nm; Remote sensing reflectance at 494 nm; Remote sensing reflectance at 495 nm; Remote sensing reflectance at 496 nm; Remote sensing reflectance at 497 nm; Remote sensing reflectance at 498 nm; Remote sensing reflectance at 499 nm; Remote sensing reflectance at 500 nm; Remote sensing reflectance at 501 nm; Remote sensing reflectance at 502 nm; Remote sensing reflectance at 503 nm; Remote sensing reflectance at 504 nm; Remote sensing reflectance at 505 nm; Remote sensing reflectance at 506 nm; Remote sensing reflectance at 507 nm; Remote sensing reflectance at 508 nm; Remote sensing reflectance at 509 nm; Remote sensing reflectance at 510 nm; Remote sensing reflectance at 511 nm; Remote sensing reflectance at 512 nm; Remote sensing reflectance at 513 nm; Remote sensing reflectance at 514 nm; Remote sensing reflectance at 515 nm; Remote sensing reflectance at 516 nm; Remote sensing reflectance at 517 nm; Remote sensing reflectance at 518 nm; Remote sensing reflectance at 519 nm; Remote sensing reflectance at 520 nm; Remote sensing reflectance at 521 nm; Remote sensing reflectance at 522 nm; Remote sensing reflectance at 523 nm; Remote sensing reflectance at 524 nm; Remote sensing reflectance at 525 nm; Remote sensing reflectance at 526 nm; Remote sensing reflectance at 527 nm; Remote sensing reflectance at 528 nm; Remote sensing reflectance at 529 nm; Remote sensing reflectance at 530 nm; Remote sensing reflectance at 531 nm; Remote sensing reflectance at 532 nm; Remote sensing reflectance at 533 nm; Remote sensing reflectance at 534 nm; Remote sensing reflectance at 535 nm; Remote sensing reflectance at 536 nm; Remote sensing reflectance at 537 nm; Remote sensing reflectance at 538 nm; Remote sensing reflectance at 539 nm; Remote sensing reflectance at 540 nm; Remote sensing reflectance at 541 nm; Remote sensing reflectance at 542 nm; Remote sensing reflectance at 543 nm; Remote sensing reflectance at 544 nm; Remote sensing reflectance at 545 nm; Remote
    Type: Dataset
    Format: text/tab-separated-values, 6817 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 6
    facet.materialart.
    Unknown
    Chlorophyll a in Arctic Ocean, Fram Strait, and Greenland Sea, 1991-2012 (2015)
    PANGAEA
    In:  Supplement to: Nöthig, Eva-Maria; Bracher, Astrid; Engel, Anja; Metfies, Katja; Niehoff, Barbara; Peeken, Ilka; Bauerfeind, Eduard; Cherkasheva, Alexandra; Gäbler-Schwarz, Stefanie; Hardge, Kristin; Kilias, Estelle; Kraft, Angelina; Mebrahtom Kidane, Yohannes; Lalande, Catherine; Piontek, Judith; Thomisch, Karolin; Wurst, Mascha (2015): Summertime plankton ecology in Fram Strait—a compilation of long- and short-term observations. Polar Research, 34, 18 pp, https://doi.org/10.3402/polar.v34.23349
    Details
    Publication Date: 2023-06-21
    Description: Between Greenland and Spitsbergen, Fram Strait is a region where cold ice-covered Polar Water exits the Arctic Ocean with the East Greenland Current (EGC) and warm Atlantic Water enters the Arctic Ocean with the West Spitsbergen Current (WSC). In this compilation, we present two different data sets from plankton ecological observations in Fram Strait: (1) long-term measurements of satellite-derived (1998-2012) and in situ chlorophyll a (chl a) measurements (mainly summer cruises, 1991-2012) plus protist compositions (a station in WSC, eight summer cruises, 1998-2011); and (2) short-term measurements of a multidisciplinary approach that includes traditional plankton investigations, remote sensing, zooplankton, microbiological and molecular studies, and biogeochemical analyses carried out during two expeditions in June/July in the years 2010 and 2011. Both summer satellite-derived and in situ chl a concentrations showed slight trends towards higher values in the WSC since 1998 and 1991, respectively. In contrast, no trends were visible in the EGC. The protist composition in the WSC showed differences for the summer months: a dominance of diatoms was replaced by a dominance of Phaeocystis pouchetii and other small pico- and nanoplankton species. The observed differences in eastern Fram Strait were partially due to a warm anomaly in the WSC. Although changes associated with warmer water temperatures were observed, further long-term investigations are needed to distinguish between natural variability and climate change in Fram Strait. Results of two summer studies in 2010 and 2011 revealed the variability in plankton ecology in Fram Strait.
    Keywords: AWI_BioOce; Biological Oceanography @ AWI
    Type: Dataset
    Format: application/zip, 24 datasets
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 7
    facet.materialart.
    Unknown
    Remote sensing reflectance obtained from spectral underwater upwelling radiance and solar downwelling irradiance measurements during POLARSTERN cruise ARK-XXVI/3 (PS78) (2018)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2024-02-16
    Keywords: Arctic Ocean; ARK-XXVI/3; DATE/TIME; DEPTH, water; Elevation of event; Event label; FRAM; FRontiers in Arctic marine Monitoring; Laptev Sea; Latitude of event; Longitude of event; Polarstern; PS78/216-2; PS78/218-3; PS78/224-3; PS78/226-2; PS78/227-3; PS78/230-3; PS78/235-3; PS78/242-2; PS78/245-4; PS78/259-2; PS78/262-2; PS78/265-2; PS78/270-3; PS78/272-1; PS78/276-2; PS78/280-2; PS78/300-2; PS78 TransArc; RAMSES; RAMSES-ACC-VIS hyperspectral radiometer and RAMSES-ARC hyperspectral radiometer, TriOS; RAMSES hyperspectral radiometer; Remote sensing reflectance at 350 nm; Remote sensing reflectance at 351 nm; Remote sensing reflectance at 352 nm; Remote sensing reflectance at 353 nm; Remote sensing reflectance at 354 nm; Remote sensing reflectance at 355 nm; Remote sensing reflectance at 356 nm; Remote sensing reflectance at 357 nm; Remote sensing reflectance at 358 nm; Remote sensing reflectance at 359 nm; Remote sensing reflectance at 360 nm; Remote sensing reflectance at 361 nm; Remote sensing reflectance at 362 nm; Remote sensing reflectance at 363 nm; Remote sensing reflectance at 364 nm; Remote sensing reflectance at 365 nm; Remote sensing reflectance at 366 nm; Remote sensing reflectance at 367 nm; Remote sensing reflectance at 368 nm; Remote sensing reflectance at 369 nm; Remote sensing reflectance at 370 nm; Remote sensing reflectance at 371 nm; Remote sensing reflectance at 372 nm; Remote sensing reflectance at 373 nm; Remote sensing reflectance at 374 nm; Remote sensing reflectance at 375 nm; Remote sensing reflectance at 376 nm; Remote sensing reflectance at 377 nm; Remote sensing reflectance at 378 nm; Remote sensing reflectance at 379 nm; Remote sensing reflectance at 380 nm; Remote sensing reflectance at 381 nm; Remote sensing reflectance at 382 nm; Remote sensing reflectance at 383 nm; Remote sensing reflectance at 384 nm; Remote sensing reflectance at 385 nm; Remote sensing reflectance at 386 nm; Remote sensing reflectance at 387 nm; Remote sensing reflectance at 388 nm; Remote sensing reflectance at 389 nm; Remote sensing reflectance at 390 nm; Remote sensing reflectance at 391 nm; Remote sensing reflectance at 392 nm; Remote sensing reflectance at 393 nm; Remote sensing reflectance at 394 nm; Remote sensing reflectance at 395 nm; Remote sensing reflectance at 396 nm; Remote sensing reflectance at 397 nm; Remote sensing reflectance at 398 nm; Remote sensing reflectance at 399 nm; Remote sensing reflectance at 400 nm; Remote sensing reflectance at 401 nm; Remote sensing reflectance at 402 nm; Remote sensing reflectance at 403 nm; Remote sensing reflectance at 404 nm; Remote sensing reflectance at 405 nm; Remote sensing reflectance at 406 nm; Remote sensing reflectance at 407 nm; Remote sensing reflectance at 408 nm; Remote sensing reflectance at 409 nm; Remote sensing reflectance at 410 nm; Remote sensing reflectance at 411 nm; Remote sensing reflectance at 412 nm; Remote sensing reflectance at 413 nm; Remote sensing reflectance at 414 nm; Remote sensing reflectance at 415 nm; Remote sensing reflectance at 416 nm; Remote sensing reflectance at 417 nm; Remote sensing reflectance at 418 nm; Remote sensing reflectance at 419 nm; Remote sensing reflectance at 420 nm; Remote sensing reflectance at 421 nm; Remote sensing reflectance at 422 nm; Remote sensing reflectance at 423 nm; Remote sensing reflectance at 424 nm; Remote sensing reflectance at 425 nm; Remote sensing reflectance at 426 nm; Remote sensing reflectance at 427 nm; Remote sensing reflectance at 428 nm; Remote sensing reflectance at 429 nm; Remote sensing reflectance at 430 nm; Remote sensing reflectance at 431 nm; Remote sensing reflectance at 432 nm; Remote sensing reflectance at 433 nm; Remote sensing reflectance at 434 nm; Remote sensing reflectance at 435 nm; Remote sensing reflectance at 436 nm; Remote sensing reflectance at 437 nm; Remote sensing reflectance at 438 nm; Remote sensing reflectance at 439 nm; Remote sensing reflectance at 440 nm; Remote sensing reflectance at 441 nm; Remote sensing reflectance at 442 nm; Remote sensing reflectance at 443 nm; Remote sensing reflectance at 444 nm; Remote sensing reflectance at 445 nm; Remote sensing reflectance at 446 nm; Remote sensing reflectance at 447 nm; Remote sensing reflectance at 448 nm; Remote sensing reflectance at 449 nm; Remote sensing reflectance at 450 nm; Remote sensing reflectance at 451 nm; Remote sensing reflectance at 452 nm; Remote sensing reflectance at 453 nm; Remote sensing reflectance at 454 nm; Remote sensing reflectance at 455 nm; Remote sensing reflectance at 456 nm; Remote sensing reflectance at 457 nm; Remote sensing reflectance at 458 nm; Remote sensing reflectance at 459 nm; Remote sensing reflectance at 460 nm; Remote sensing reflectance at 461 nm; Remote sensing reflectance at 462 nm; Remote sensing reflectance at 463 nm; Remote sensing reflectance at 464 nm; Remote sensing reflectance at 465 nm; Remote sensing reflectance at 466 nm; Remote sensing reflectance at 467 nm; Remote sensing reflectance at 468 nm; Remote sensing reflectance at 469 nm; Remote sensing reflectance at 470 nm; Remote sensing reflectance at 471 nm; Remote sensing reflectance at 472 nm; Remote sensing reflectance at 473 nm; Remote sensing reflectance at 474 nm; Remote sensing reflectance at 475 nm; Remote sensing reflectance at 476 nm; Remote sensing reflectance at 477 nm; Remote sensing reflectance at 478 nm; Remote sensing reflectance at 479 nm; Remote sensing reflectance at 480 nm; Remote sensing reflectance at 481 nm; Remote sensing reflectance at 482 nm; Remote sensing reflectance at 483 nm; Remote sensing reflectance at 484 nm; Remote sensing reflectance at 485 nm; Remote sensing reflectance at 486 nm; Remote sensing reflectance at 487 nm; Remote sensing reflectance at 488 nm; Remote sensing reflectance at 489 nm; Remote sensing reflectance at 490 nm; Remote sensing reflectance at 491 nm; Remote sensing reflectance at 492 nm; Remote sensing reflectance at 493 nm; Remote sensing reflectance at 494 nm; Remote sensing reflectance at 495 nm; Remote sensing reflectance at 496 nm; Remote sensing reflectance at 497 nm; Remote sensing reflectance at 498 nm; Remote sensing reflectance at 499 nm; Remote sensing reflectance at 500 nm; Remote sensing reflectance at 501 nm; Remote sensing reflectance at 502 nm; Remote sensing reflectance at 503 nm; Remote sensing reflectance at 504 nm; Remote sensing reflectance at 505 nm; Remote sensing reflectance at 506 nm; Remote sensing reflectance at 507 nm; Remote sensing reflectance at 508 nm; Remote sensing reflectance at 509 nm; Remote sensing reflectance at 510 nm; Remote sensing reflectance at 511 nm; Remote sensing reflectance at 512 nm; Remote sensing reflectance at 513 nm; Remote sensing reflectance at 514 nm; Remote sensing reflectance at 515 nm; Remote sensing reflectance at 516 nm; Remote sensing reflectance at 517 nm; Remote sensing reflectance at 518 nm; Remote sensing reflectance at 519 nm; Remote sensing reflectance at 520 nm; Remote sensing reflectance at 521 nm; Remote sensing reflectance at 522 nm; Remote sensing reflectance at 523 nm; Remote sensing reflectance at 524 nm; Remote sensing reflectance at 525 nm; Remote sensing reflectance at 526 nm; Remote sensing reflectance at 527 nm; Remote sensing reflectance at 528 nm; Remote sensing reflectance at 529 nm; Remote sensing reflectance at 530 nm; Remote sensing reflectance at 531 nm; Remote sensing reflectance at 532 nm; Remote sensing reflectance at 533 nm; Remote sensing reflectance at 534 nm; Remote sensing reflectance at 535 nm; Remote sensing reflectance at 536 nm; Remote sensing reflectance at 537 nm; Remote sensing reflectance at 538 nm; Remote sensing reflectance at 539 nm; Remote sensing reflectance at 540 nm; Remote sensing reflectance at 541 nm; Remote sensing reflectance at 542 nm; Remote sensing reflectance at 543 nm; Remote sensing reflectance at 544 nm; Remote sensing reflectance at 545 nm; Remote
    Type: Dataset
    Format: text/tab-separated-values, 6817 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 8
    facet.materialart.
    Unknown
    From the chlorophyll-a in the surface layer to its vertical profile: a Greenland Sea relationship for satellite applications. (2013)
    COPERNICUS GESELLSCHAFT MBH
    In:  EPIC3Ocean Science, COPERNICUS GESELLSCHAFT MBH, 9(2), pp. 431-445, ISSN: 1812-0784
    Details
    Publication Date: 2019-12-03
    Description: Current estimates of global marine primary production range over a factor of two. Improving these estimates requires an accurate knowledge of the chlorophyll vertical profiles, since they are the basis for most primary production models. At high latitudes, the uncertainty in primary production estimates is larger than globally, because here phytoplankton absorption shows specific characteristics due to the low-light adaptation, and in situ data and ocean colour observations are scarce. To date, studies describing the typical chlorophyll profile based on the chlorophyll in the surface layer have not included the Arctic region, or, if it was included, the dependence of the profile shape on surface concentration was neglected. The goal of our study was to derive and describe the typical Greenland Sea chlorophyll profiles, categorized according to the chlorophyll concentration in the surface layer and further monthly resolved profiles. The Greenland Sea was chosen because it is known to be one of the most productive regions of the Arctic and is among the regions in the Arctic where most chlorophyll field data are available. Our database contained 1199 chlorophyll profiles from R/Vs Polarstern and Maria S. Merian cruises combined with data from the ARCSS-PP database (Arctic primary production in situ database) for the years 1957–2010. The profiles were categorized according to their mean concentration in the surface layer, and then monthly median profiles within each category were calculated. The category with the surface layer chlorophyll (CHL) exceeding 0.7 mg C m−3 showed values gradually decreasing from April to August. A similar seasonal pattern was observed when monthly profiles were averaged over all the surface CHL concentrations. The maxima of all chlorophyll profiles moved from the greater depths to the surface from spring to late summer respectively. The profiles with the smallest surface values always showed a subsurface chlorophyll maximum with its median magnitude reaching up to three times the surface concentration. While the variability of the Greenland Sea season in April, May and June followed the global non-monthly resolved relationship of the chlorophyll profile to surface chlorophyll concentrations described by the model of Morel and Berthon (1989), it deviated significantly from the model in the other months (July–September), when the maxima of the chlorophyll are at quite different depths. The Greenland Sea dimensionless monthly median profiles intersected roughly at one common depth within each category. By applying a Gaussian fit with 0.1 mg C m−3 surface chlorophyll steps to the median monthly resolved chlorophyll profiles of the defined categories, mathematical approximations were determined. They generally reproduce the magnitude and position of the CHL maximum, resulting in an average 4% underestimation in Ctot (and 2% in rough primary production estimates) when compared to in situ estimates. These mathematical approximations can be used as the input to the satellite-based primary production models that estimate primary production in the Arctic regions.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 9
    facet.materialart.
    Unknown
    Influence of the physical environment on phytoplankton blooms: a case study in the Fram Strait (2014)
    ELSEVIER SCIENCE BV
    In:  EPIC3Journal of Marine Systems, ELSEVIER SCIENCE BV, 132, pp. 196-207, ISSN: 0924-7963
    Details
    Publication Date: 2017-02-01
    Description: The Fram Strait is the main gateway for water, heat and sea-ice exchanges between the Arctic Ocean and the North Atlantic. The complex physical environment results in a highly variable primary production in space and time. Previous regional studies have defined key bottom-up (ice cover and stratification from melt water controlling the light availability, and wind mixing and water transport affecting the supply of nutrients) and top-down processes (heterotrophic grazing). In this study, in situ field data, remote sensing and modeling techniques were combined to investigate in detail the influence of melting sea-ice and ocean properties on the development of phytoplankton blooms in the Fram Strait region for the years 1998–2009. Satellite-retrieved chlorophyll-a concentrations from temporarily ice-free zones were validated with contextual field data. These were then integrated per month on a grid size of 20 × 20 km, resulting in 10 grids/fields. Factors tested for their influence on spatial and temporal variation of chlorophyll-a were: sea-ice concentration from satellite and sea-ice thickness, ocean stratification, water temperature and salinity time-series simulated by the ice-ocean model NAOSIM. The time series analysis for those ten ice-free fields showed a regional separation according to different physical processes affecting phytoplankton distribution. At the marginal ice zone the melting sea-ice was promoting phytoplankton growth by stratifying the water column and potentially seeding phytoplankton communities. In this zone, the highest mean chlorophyll concentration averaged for the productive season (April–August) of 0.8 mgC/m3 was observed. In the open ocean the phytoplankton variability was correlated highest to stratification formed by solar heating of the upper ocean layers. Coastal zone around Svalbard showed processes associated with the presence of coastal ice were rather suppressing than promoting the phytoplankton growth. During the twelve years of observations, chlorophyll concentrations significantly increased in the southern part of the Fram Strait, associated with an increase in sea surface temperature and a decrease in Svalbard coastal ice.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 10
    facet.materialart.
    Unknown
    Natural variability or anthropogenically-induced variation? Insights from 15 years of multidisciplinary observations at the arctic marine LTER site HAUSGARTEN (2018)
    Details
    Publication Date: 2021-03-29
    Description: Time-series studies of arctic marine ecosystems are rare. This is not surprising since polar regions arelargely only accessible by means of expensive modern infrastructure and instrumentation. In 1999, theAlfred Wegener Institute, Helmholtz-Centre for Polar and Marine Research (AWI) established the LTER(Long-Term Ecological Research) observatory HAUSGARTEN crossing the Fram Strait at about 79◦N.Multidisciplinary investigations covering all parts of the open-ocean ecosystem are carried out at a totalof 21 permanent sampling sites in water depths ranging between 250 and 5500 m. From the outset,repeated sampling in the water column and at the deep seafloor during regular expeditions in summermonths was complemented by continuous year-round sampling and sensing using autonomous instru-ments in anchored devices (i.e., moorings and free-falling systems). The central HAUSGARTEN stationat 2500 m water depth in the eastern Fram Strait serves as an experimental area for unique biologicalin situ experiments at the seafloor, simulating various scenarios in changing environmental settings.Long-term ecological research at the HAUSGARTEN observatory revealed a number of interesting tem-poral trends in numerous biological variables from the pelagic system to the deep seafloor. Contrary tocommon intuition, the entire ecosystem responded exceptionally fast to environmental changes in theupper water column. Major variations were associated with a Warm-Water-Anomaly evident in sur-face waters in eastern parts of the Fram Strait between 2005 and 2008. However, even after 15 years ofintense time-series work at HAUSGARTEN, we cannot yet predict with complete certainty whether thesetrends indicate lasting alterations due to anthropologically-induced global environmental changes of thesystem, or whether they reflect natural variability on multiyear time-scales, for example, in relation todecadal oscillatory atmospheric processes.
    Keywords: HAUSGARTEN; Arctic Ocean; Deep sea; Natural variability; Anthropogenic impact ; 551
    Language: English
    Type: article , publishedVersion
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    CITATION GEO-LEO
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...