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
  • 2020-2024  (12)
Document type
Keywords
Publisher
Years
Year
  • 1
    facet.materialart.
    Unknown
    Sable oxygen isotope and Mg/Ca ratios of planktonic foraminifera from KX97322-4 (KX22-4) (2021)
    PANGAEA
    Details
    Publication Date: 2023-03-30
    Description: We obtained Core KX97322-4 (00°01.73′S, 159°14.66′E, 2362 m) from the Ontong Java Plateau in the central WPWP using a giant piston corer on the Science-1 vessel during the Warm Pool Subject Cruise executed in 2008. The sedimentation rate is 0.39–4.95 cm kyr^-1^, with an average time resolution of 0.57 kyr cm^-1^. The age model was established based on downcore stable oxygen isotope measurements on the benthic foraminifer Cibicidoides wuellerstorfi (〉500 μm) correlated with the reference benthic stack LR04 using Match 2.3.1 software, combined with five accelerator mass spectrometry radiocarbon (^14^C) dates on the planktonic foraminifer Trilobatus sacculifer (with a sac) (350–500 μm) measured at the National Ocean Sciences Accelerator Mass Spectrometry facility, Woods Hole Oceanographic Institution, USA. We measured stable oxygen isotope and Mg/Ca ratio of planktic foraminifera Globigerinoides ruber and Neogloboquadrina dutertrei at the Institute of Oceanology, Chinese Academy of Sciences (IOCAS), using GV IsoPrime mass spectrometer and inductively coupled plasma-optical emission spectrometry (ICP-OES, Thermo-Fisher, iCAP6300 radial) to rebuild paleo-temperature and salinity of the central western Pacific warm pool during the last 360, 000 years, aiming to probe paleo-ENSO progress in late Quaternary.
    Keywords: AGE; DEPTH, sediment/rock; Foraminifera; foraminifera oxygen isotopes. Late Quaternary; Giant piston corer; Globigerinoides ruber, Magnesium/Calcium ratio; Globigerinoides ruber, δ18O; GPC; KX22-4; KX97322-4; Mg/Ca paleothermometry; Neogloboquadrina dutertrei, Magnesium/Calcium ratio; Neogloboquadrina dutertrei, δ18O; Sea sub-surface salinity; Sea sub-surface temperature; Sea surface salinity; Sea surface salinity, difference; Sea surface temperature; Temperature, difference; West Pacific Warm Pool; δ18O, seawater, reconstructed; δ18O, seawater, reconstructed, difference; δ18O, seawater, reconstructed, residual
    Type: Dataset
    Format: text/tab-separated-values, 9271 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 2
    facet.materialart.
    Unknown
    Age determination of sediment core LV53-19-1 (2020)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: Age, 14C AMS; Age, 14C calibrated; Age, dated; Age, dated material; Age, dated standard error; AWI_Paleo; Biomarker; Calendar age; Calendar age, maximum/old; Calendar age, minimum/young; DEPTH, sediment/rock; Japan Sea; Laboratory code/label; Last Glacial; LV53-19-1; North Pacific; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; paleo-oceanography; PC; Piston corer; sea-level; SST; TEX86; UK'37; upper ocean
    Type: Dataset
    Format: text/tab-separated-values, 49 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 3
    facet.materialart.
    Unknown
    Stable oxygen isotope ratios of Globigerina bulloides of sediment core LV53-19-1 (2020)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: AGE; AWI_Paleo; Biomarker; DEPTH, sediment/rock; Globigerina bulloides, δ18O; Japan Sea; Last Glacial; LV53-19-1; North Pacific; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; paleo-oceanography; PC; Piston corer; sea-level; SST; TEX86; UK'37; upper ocean
    Type: Dataset
    Format: text/tab-separated-values, 33 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 4
    facet.materialart.
    Unknown
    Evolution of the upper ocean stratification in the Japan Sea since the last glacial (2020)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Description: Paleoceanographic evidence commonly indicates that Last Glacial Maximum surface temperatures in the Japan Sea were comparable to modern conditions, in striking difference to colder neighboring regions. Here, based on a core from the central Japan Sea, our results show similar UK′37- and TEXL86-derived temperatures between 24.7-16.3 ka BP, followed by an abrupt divergence at ~16.3 ka BP and a weakening of divergence after ~ 8.7 ka BP. We attribute this process to a highly stratified glacial upper ocean controlled by the East Asian Summer Monsoon, increasing thermal gradient between surface and subsurface layers during the deglaciation and the intrusion of Tsushima Warm Current since the mid Holocene, respectively. Therefore, we suggest threshold-like changes in upper-ocean temperatures linked to sea-level rise and monsoon dynamics, rather than just sea surface temperatures, play a critical role in shaping the thermal and ventilation history of this NW Pacific marginal sea.
    Keywords: AWI_Paleo; Biomarker; Japan Sea; Last Glacial; LV53-19-1; North Pacific; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; paleo-oceanography; PC; Piston corer; sea-level; SST; TEX86; UK'37; upper ocean
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 5
    facet.materialart.
    Unknown
    Mg/Ca ratios and stable oxygen isotope of multiple planktonic foraminifera from KX97322-4 (KX22-4) over the last 30,000 years (2022)
    PANGAEA
    Details
    Publication Date: 2023-12-14
    Description: Using a large piston corer on the Science-1 vessel during the Warm Pool Subject Cruise in 2008, we recovered Core KX97322-4 (00°01.73′S, 159°14.66′E, 2362 m) from the Ontong-Java Plateau in the central western Pacific warm pool. The sedimentation rate is 0.39-4.95 cm/kyr, with an average time resolution of 0.57 kyr/cm. The age model was established based on downcore stable oxygen isotope measurements on the benthic foraminifer Cibicidoides wuellerstorfi (〉500 μm) correlated with the reference benthic stack LR04 using Match 2.3.1 software, combined with seven accelerator mass spectrometry radiocarbon (14C) data on the planktonic foraminifer Trilobatus sacculifer (with a sac) (350–500 μm), five data published before and another two new data was performed at NOSMAS and Beta Analytic Inc., USA. We measured stable oxygen isotope and Mg/Ca ratio of planktic foraminifera Globigerinoides ruber, T.sacculifer, Neogloboquadrina dutertrei, Globigerinella siphonifera, Globorotalia crassaformis and Globorotalia truncatulinoides dextral at the Institute of Oceanology, Chinese Academy of Sciences (IOCAS), using GV IsoPrime mass spectrometer and inductively coupled plasma-optical emission spectrometry (ICP-OES, Thermo-Fisher, iCAP6300 radial) to rebuild paleo-temperature and salinity of the central western Pacific warm pool during the last 30,000 years, aiming to probe paleo-ENSO progress during the last deglaciation.
    Keywords: AGE; Calculated; Giant piston corer; Globigerinella siphonifera, Magnesium/Calcium ratio; Globigerinoides ruber, Magnesium/Calcium ratio; Globigerinoides ruber, δ18O; Globorotalia crassaformis, Magnesium/Calcium ratio; Globorotalia truncatulinoides dextral, Magnesium/Calcium ratio; GPC; KX22-4; KX97322-4; last deglaciation; Mg/Ca-based paleotemperatures; Neogloboquadrina dutertrei, Magnesium/Calcium ratio; Ocean heat content; oxygen isotope; Planktonic foraminifera; see description in data abstract; Temperature, water; Trilobatus sacculifer, Magnesium/Calcium ratio; Trilobatus sacculifer, δ18O; Western Pacific Warm Pool
    Type: Dataset
    Format: text/tab-separated-values, 616 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 6
    facet.materialart.
    Unknown
    Biomarker of sediment core LV53-19-1 (2020)
    PANGAEA
    Details
    Publication Date: 2023-12-18
    Keywords: Acyclic glycerol dialkyl glycerol tetraether; AGE; Alkenone, C37:2; Alkenone, C37:2+C37:3; Alkenone, C37:3; Alkenone, unsaturation index UK'37; AWI_Paleo; Biomarker; Branched and isoprenoid tetraether index; Branched glycerol dialkyl glycerol tetraether, Ia; Branched glycerol dialkyl glycerol tetraether, Ib; Branched glycerol dialkyl glycerol tetraether, Ic; Branched glycerol dialkyl glycerol tetraether, IIa; Branched glycerol dialkyl glycerol tetraether, IIb; Branched glycerol dialkyl glycerol tetraether, IIc; Branched glycerol dialkyl glycerol tetraether, IIIa; Branched glycerol dialkyl glycerol tetraether, IIIb; Branched glycerol dialkyl glycerol tetraether, IIIc; Calculated from TEX86H (Kim et al., 2010); Calculated from TEX86L (Kim et al., 2010); Calculated from UK'37 (Müller et al, 1998); Crenarchaeol; Crenarchaeol regio-isomer; DEPTH, sediment/rock; Dicyclic glycerol dialkyl glycerol tetraether; Isoprenoidal glycerol dialkyl glycerol tetraethers; Japan Sea; Last Glacial; LV53-19-1; Monocyclic glycerol dialkyl glycerol tetraether; North Pacific; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; paleo-oceanography; PC; Piston corer; Ratio; Ring index; sea-level; Sea surface temperature; Sea surface temperature, annual mean; SST; Temperature, difference; Tetraether index of 86 carbon atoms, high-temperature region; Tetraether index of 86 carbon atoms, low-temperature region; TEX86; Tricyclic glycerol dialkyl glycerol tetraether; UK'37; upper ocean
    Type: Dataset
    Format: text/tab-separated-values, 645 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 7
    facet.materialart.
    Unknown
    Basal melt rates in equilibrium simulations of the Antarctic ice sheet under pre-industrial, 40 ka, and Last Glacial Maximum ocean conditions using the Parallel Ice Sheet Model (PISM 1.1) (2021)
    PANGAEA
    Details
    Publication Date: 2024-04-20
    Description: We present basal melt rates for the ice shelves in equilibrium simulations of the Antarctic ice sheet (AIS), using the 3D thermodynamical Parallel Ice Sheet Model (PISM) version 1.1 with PICO as ocean component. The applied climate forcing consists of yearly mean present-day temperature and precipitation fields from RACMO2.3 (RACMO2 ANT27), and 400-800 m depth average ocean temperature and salinity, obtained from simulations using the atmosphere-ocean general circulation model COSMOS (ocean model MPIOM). COSMOS was run using pre-industrial settings (PID; 278 ppm CO2), settings from 40 kyr ago (40ka; 195 ppm CO2), and Last Glacial Maximum settings (LGM; 185 ppm CO2). All simulations are started with present-day bedrock conditions, and a present-day AIS size (Bedmap2). The steady state simulations are conducted by applying the same climate forcing over 200 kyr, after a thermodynamical spin-up (no mass changes) of 200,100 yr.
    Keywords: 40ka; Antarctica; Antarctic Ice Sheet; Basal melt rates; Glacial climate; Last Glacial Maximum; pre-industrial
    Type: Dataset
    Format: application/zip, 164.5 kBytes
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 8
    facet.materialart.
    Unknown
    Changes in deep Pacific circulation and carbon storage during the Pliocene-Pleistocene transition (2023)
    Elsevier
    In:  EPIC3Earth and Planetary Science Letters, Elsevier, 605, pp. 118020-118020, ISSN: 0012-821X
    Details
    Publication Date: 2023-03-10
    Description: The global climate has been gradually cooling over the Cenozoic and is punctuated by the intensification of Northern Hemisphere Glaciation (NHG) from the latest Pliocene to earliest Pleistocene (∼3.1–2.5 millions of years ago, Ma). A decline of atmospheric CO2 is supposed as a prerequisite for the NHG, but the associated carbon-cycle processes remain elusive. Here we combine foraminiferal records of neodymium isotope and boron-calcium ratio, and simulations of an Earth system model, to investigate changes in the water-mass composition and carbonate-ion concentration of the deep Pacific Ocean during the NHG. Our proxy records have revealed a significant expansion of southern-sourced waters with increased respired carbon storage into the deep Pacific during the NHG. These changes may be explained by strengthened deep-water formation and biological-pump efficiency in the Southern Ocean due to Antarctic sea-ice growth, as suggested by our model experiments and evidence from the Sub-Antarctic region. These results provide key clues for quantifying the role of the dissolved inorganic carbon content of deep Pacific waters in modulating atmospheric CO2 during the NHG.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 9
    facet.materialart.
    Unknown
    The North Pacific in Warm(ing) Climates: effects on ocean circulation and biogeochemical cycles (2020)
    In:  EPIC3EGU General Assembly, Online Meeting, 2020-05-04-2020-05-08
    Details
    Publication Date: 2023-06-21
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 10
    facet.materialart.
    Unknown
    Aridity synthesis for eight selected key regions of the global climate system during the last 60 000 years (2020)
    Copernicus Publications (EGU)
    Details
    Publication Date: 2023-02-08
    Description: A compilation of the published literature on dust content in terrestrial and marine sediment cores was synchronized with pollen data and speleothem growth phases on the Greenland Ice Core Chronology 2005 (GICC05) time axis. Aridity patterns for eight key areas of the global climate system have been reconstructed for the last 60 000 years. These records have different time resolutions and different dating methods, i.e. different types of stratigraphy. Nevertheless, all regions analysed in this study show humid conditions during early Marine Isotope Stage 3 (MIS3) and the early Holocene or deglaciation, but not always at the same time. Such discrepancies have been interpreted as regional effects, although stratigraphic uncertainties may affect some of the proposed interpretations. In comparison, most of the MIS2 interval becomes arid in all of the Northern Hemisphere records, but the peak arid conditions of the Last Glacial Maximum (LGM) and Heinrich event 1 differ in duration and intensity among regions. In addition, we also compare the aridity synthesis with modelling results using a global climate model (GCM). Indeed, geological archives and GCMs show agreement on the aridity pattern for the Holocene or deglaciation, for the LGM and for late MIS3.
    Type: Article , PeerReviewed
    Format: text
    Format: archive
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    OceanRep: Article in a Scientific Journal - peer-reviewed
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...