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  • 40ka; Antarctica; Antarctic Ice Sheet; Basal melt rates; Glacial climate; Last Glacial Maximum; pre-industrial  (1)
  • 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  (1)
  • global warming  (1)
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  • 1
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    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
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    DATA PANGAEA
  • 2
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    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
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    DATA PANGAEA
  • 3
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    Poleward Shift of the Major Ocean Gyres Detected in a Warming Climate (2021)
    Details
    Publication Date: 2021-10-12
    Description: Recent evidence shows that wind-driven ocean currents, like the western boundary currents, are strongly affected by global warming. However, due to insufficient observations both on temporal and spatial scales, the impact of climate change on large-scale ocean gyres is still not clear. Here, based on satellite observations of sea surface height and sea surface temperature, we find a consistent poleward shift of the major ocean gyres. Due to strong natural variability, most of the observed ocean gyre shifts are not statistically significant, implying that natural variations may contribute to the observed trends. However, climate model simulations forced with increasing greenhouse gases suggest that the observed shift is most likely to be a response of global warming. The displacement of ocean gyres, which is coupled with the poleward shift of extratropical atmospheric circulation, has broad impacts on ocean heat transport, regional sea level rise, and coastal ocean circulation.
    Keywords: 551.46 ; ocean gyre ; climate change ; poleward shift ; global warming ; ocean circulation ; sea level rise
    Language: English
    Type: map
    Location Call Number Limitation Availability
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    CITATION GEO-LEO
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