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  • 1
    Electronic Resource
    Electronic Resource
    Correlative 90 kyr northeast Asia–northwest Pacific climate records (1985)
    [s.l.] : Nature Publishing Group
    Nature 313 (1985), S. 470-472 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Modern pollen and radiolaria distributions in sediments from seas around Japan are used to interpret fossil floral and faunal changes10,11. Specifically, factor analysis of abundance data for 35 radiolarian species in 66 surface sediment samples from the northwest Pacific8 yielded four assemblages ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/313470a0
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Tropical forest history of the Ecuadorian Andes over the last 34,000 years: preliminary results from pollen and oxygen isotope analyses of Trident 163-13 from the eastern equatorial Pacific [abstract] (2021)
    In:  http://aquaticcommons.org/id/eprint/14422 | 8 | 2014-02-07 21:55:06 | 14422
    Details
    Publication Date: 2021-07-10
    Description: EXTRACT (SEE PDF FOR FULL ABSTRACT):Pollen from the upper 2.75 m of a core taken 200 km west of the Golfo de Guayaquil, Ecuador (Trident 163-13, 3° S, 84° W, 3,000 m water depth) documents changes in Andean vegetation and climate of the Cordillera Occidental for ~17,000 years before and after the last glacial maximum.
    Keywords: Atmospheric Sciences ; Earth Sciences ; PACLIM ; palynology
    Repository Name: AquaDocs
    Type: conference_item
    Format: application/pdf
    Format: application/pdf
    Format: 39-39
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    PAPER (OA)
  • 3
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    Survey of pollen and spores in DSDP Holes 96-618 and 619
    PANGAEA
    In:  Supplement to: Heusser, Linda E (1986): Survey of pollen and spores, Deep Sea Drilling Project Leg 96. In: Bouma, AH; Coleman, JM; Meyer, AW; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 96, 643-647, https://doi.org/10.2973/dsdp.proc.96.134.1986
    Details
    Publication Date: 2023-05-12
    Description: A preliminary palynological survey of 118 samples from the Mississippi Fan (Sites 615, 616, and 620) and from 2 intraslope basins (Sites 619 and 618) shows pollen in all samples. Reworked pollen is generally abundant, forming over 50% of the sum of pollen and reworked pollen. Concentration of nonreworked pollen is usually low (on the order of tens to hundreds of pollen grains per cubic centimeter wet sediment). Conifers, primarily Pinus, Picea, and Tsuga, dominate Pleistocene marine pollen spectra; significant percentages of Quercus are present in Holocene sediments and in sediments deposited during oxygen-isotope Stage 5.
    Keywords: Deep Sea Drilling Project; DSDP
    Type: Dataset
    Format: application/zip, 3 datasets
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    DATA PANGAEA
  • 4
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    Stable oxygen isotope ratios, calcium carbonate and opal content in late Pliocene sediments of DSDP Hole 75-532 in the Southeast Atlantic (Table 1)
    PANGAEA
    In:  Supplement to: Sancetta, Constance A; Heusser, Linda E; Hall, Michael A (1992): Late Pliocene climate in the Southeast Atlantic: Preliminary results from a multi-disciplinary study of DSDP Site 532. Marine Micropaleontology, 20(1), 59-75, https://doi.org/10.1016/0377-8398(92)90009-9
    Details
    Publication Date: 2023-06-27
    Description: Site 532 on the Walvis Ridge was sampled at 4000- to 800-year intervals from 2.24 to 2.60 Ma, spanning the three large glacial advances of the late Pliocene. An age model was created by correlating the oxygen isotope record to Site 607 with linear interpolations between tie-lines. The resultant age model differs from that in the site reports by more than 800,000 years, due to misidentification of a magnetic boundary. Sedimentation rates varied by an order of magnitude at this site, with minimum accumulation during glacial events. Interglacial intervals were charactrized by high marine production and high summer precipitation on land, while glacials had very low production and arid continental climate. During the large glacial events (Stages 96-100) conditions of low production and continental aridity reached their greatest intensity, but there is no evidence of a permanent mode shift in either marine or terrestrial records. Calcite concentration has a strong variation at obliquity frequencies, with maxima during interglacials, but occasionally shows a large amplitude at precessional frequencies as well, so that high concentrations occur in a few glacial intervals. As a result, color variation is not a reliable guide to glacial-scale cycles at this site. Composition of the phytoplankton assemblage is diverse and highly variable, and we have not been able to distinguish a clear indicator of upwelling-related production. Spectral analysis reveals obliquity and precessional signals in the pollen data, while several diatom records contain combination tones, indicating that these data represent a complicated response to both local and high-latitude forcing.
    Keywords: 75-532; AGE; Calcium carbonate; Carbonate bomb (Müller & Gastner, 1971); Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Isotope ratio mass spectrometry; Leg75; Opal, biogenic silica; Opal, extraction; Mortlock & Froelich, 1989; South Atlantic; Uvigerina spp., δ18O
    Type: Dataset
    Format: text/tab-separated-values, 702 data points
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    DATA PANGAEA
  • 5
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    (Table 3) Ratio of reworked to nonreworked pollen in selected samples from DSDP Leg 96
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 96-615; 96-618; 96-619; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Event label; Glomar Challenger; Gulf of Mexico; Gulf of Mexico/BASIN; Gulf of Mexico/FAN; Leg96; Ratio; Sample code/label
    Type: Dataset
    Format: text/tab-separated-values, 36 data points
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    DATA PANGAEA
  • 6
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    (Table 5) Organic carbon and calcium carbonate composition and ages of core W8709A-13 (2000)
    PANGAEA
    Details
    Publication Date: 2023-11-25
    Keywords: Age model; Calcium carbonate; Carbon, organic, total; Department of Geology, Oregon State University; DEPTH, sediment/rock; OSU; PC; Piston corer; W8709A; W8709A-13; Wecoma
    Type: Dataset
    Format: text/tab-separated-values, 645 data points
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    DATA PANGAEA
  • 7
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    (Table 6) δ¹⁸O, carbon composition, bulk densities, accumulation rates and ages of core EW9504-17PC (2000)
    PANGAEA
    Details
    Publication Date: 2023-11-25
    Keywords: Accumulation rate, calcium carbonate; Accumulation rate, mass; Accumulation rate, total organic carbon; Age model; Calcium carbonate; Calculated; Carbon, organic, total; Density, dry bulk; Density, wet bulk; Department of Geology, Oregon State University; Depth, reference; DEPTH, sediment/rock; Estimated; EW9504-17PC; Gamma-ray attenuation porosity evaluator (GRAPE); OSU; PC; Piston corer; Sample code/label; Sedimentation rate; Uvigerina spp., δ18O
    Type: Dataset
    Format: text/tab-separated-values, 3515 data points
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    DATA PANGAEA
  • 8
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    (Table 11) δ¹⁸O, carbon composition, bulk densities, accumulation rates and ages of core Y74-2-22 (2000)
    PANGAEA
    Details
    Publication Date: 2023-11-25
    Keywords: Accumulation rate, calcium carbonate; Accumulation rate, mass; Accumulation rate, total organic carbon; Age model; Calcium carbonate; Calculated; Carbon, organic, total; Coulometry; Density, dry bulk; Department of Geology, Oregon State University; Depth, reference; DEPTH, sediment/rock; Estimated; Intercore correlation; OSU; PC; Piston corer; Sedimentation rate; Uvigerina spp., δ18O; Y74-2; Y74-2-22; Yaquina
    Type: Dataset
    Format: text/tab-separated-values, 1919 data points
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    DATA PANGAEA
  • 9
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    Corg, CaCO3, bulk densities, accumulation rates and ages of ODP Leg 167 sites and three piston cores, California margin (2000)
    PANGAEA
    In:  Supplement to: Lyle, Mitchell W; Mix, Alan C; Ravelo, Ana Christina; Andreasen, Dyke; Heusser, Linda E; Olivarez, Annette (2000): Millennial-scale CaCO3 and Corg events along the northern and central California margins: stratigraphy and origins. In: Lyle, M; Koizumi, I; Richter, C; Moore, TC Jr (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 167, 1-20, https://doi.org/10.2973/odp.proc.sr.167.214.2000
    Details
    Publication Date: 2024-01-09
    Description: Sediments from five Leg 167 drill sites and three piston cores were analyzed for Corg and CaCO3. Oxygen isotope stratigraphy on benthic foraminifers was used to assign age models to these sedimentary records. We find that the northern and central California margin is characterized by k.y.-scale events that can be found in both the CaCO3 and Corg time series. We show that the CaCO3 events are caused by changes in CaCO3 production by plankton, not by dissolution. We also show that these CaCO3 events occur in marine isotope Stages (MIS) 2, 3, and 4 during Dansgaard/Oeschger interstadials. They occur most strongly, however, on the MIS 5/4 glaciation and MIS 2/1 deglaciation. We believe that the link between the northeastern Pacific Ocean and North Atlantic is primarily transmitted by the atmosphere, not the ocean. Highest CaCO3 production and burial occurs when the surface ocean is somewhat cooler than the modern ocean, and the surface mixed layer is somewhat more stable.
    Keywords: Department of Geology, Oregon State University; Ocean Drilling Program; ODP; OSU
    Type: Dataset
    Format: application/zip, 8 datasets
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    DATA PANGAEA
  • 10
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    High-resolution sedimentological and paleontological record of ODP Site 167-1019 (2003)
    PANGAEA
    In:  Supplement to: Barron, John A; Heusser, Linda E; Herbert, Timothy D; Lyle, Mitchell W (2003): High resolution climatic evolution of coastal Northern California during the past 16,000 Years. Paleoceanography, 18(1), 1020, https://doi.org/10.1029/2002PA000768
    Details
    Publication Date: 2024-01-09
    Description: Holocene and latest Pleistocene oceanographic conditions and the coastal climate of northern California have varied greatly, based upon high-resolution studies (ca. every 100 years) of diatoms, alkenones, pollen, CaCO3%, and total organic carbon at Ocean Drilling Program (ODP) Site 1019 (41.682°N, 124.930°W, 980 m water depth). Marine climate proxies (alkenone sea surface temperatures [SSTs] and CaCO3%) behaved remarkably like the Greenland Ice Sheet Project (GISP)-2 oxygen isotope record during the Bølling-Allerod, Younger Dryas (YD), and early part of the Holocene. During the YD, alkenone SSTs decreased by 〉3°C below mean Bølling-Allerod and Holocene SSTs. The early Holocene (ca. 11.6 to 8.2 ka) was a time of generally warm conditions and moderate CaCO3 content (generally 〉4%). The middle part of the Holocene (ca. 8.2 to 3.2 ka) was marked by alkenone SSTs that were consistently 1-2°C cooler than either the earlier or later parts of the Holocene, by greatly reduced numbers of the gyre-diatom Pseudoeunotia doliolus (〈10%), and by a permanent drop in CaCO3% to 〈3%. Starting at ca. 5.2 ka, coastal redwood and alder began a steady rise, arguing for increasing effective moisture and the development of the north coast temperate rain forest. At ca. 3.2 ka, a permanent ca. 1°C increase in alkenone SST and a threefold increase in P. doliolus signaled a warming of fall and winter SSTs. Intensified (higher amplitude and more frequent) cycles of pine pollen alternating with increased alder and redwood pollen are evidence that rapid changes in effective moisture and seasonal temperature (enhanced El Niño-Southern Oscillation [ENSO] cycles) have characterized the Site 1019 record since about 3.5 ka.
    Keywords: Ocean Drilling Program; ODP
    Type: Dataset
    Format: application/zip, 6 datasets
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    DATA PANGAEA
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