NOAA/WDS Paleoclimatology - WAIS Divide 67-6ka nssS Data and EDML, EDC and TALDICE Volcanic Tie Points
This archived Paleoclimatology Study is available from the NOAA National Centers for Environmental Information (NCEI), under the World Data Service (WDS) for Paleoclimatology. The associated NCEI study type is Ice Core. The data include parameters of ice cores with a geographic location of Antarctica. The time period coverage is from 67750 to 6024 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data.
- Cite as: Buizert, C.; Sigl, M.; Severi, M.; Markle, B.R.; Wettstein, J.J.; McConnell, J.R.; Pedro, J.B.; Sodemann, H.; Goto-Azuma, K.; Kawamura, K.; Fujita, S.; Motoyama, H.; Hirabayashi, M.; Uemura, R.; Stenni, B.; Parrenin, F.; He, F.; Fudge, T.J.; Steig, E.J. (2018-11-28): NOAA/WDS Paleoclimatology - WAIS Divide 67-6ka nssS Data and EDML, EDC and TALDICE Volcanic Tie Points. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/9rd1-cb45. Accessed [date].
- Please refer to Credit tab for full citation information.
- doi:10.25921/9rd1-cb45
- noaa-icecore-24530
- NCEI DSI 1200_02
- NCEI DSI 1200_01
noaa-icecore-24530
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Distributor | NOAA National Centers for Environmental Information
ncei.info@noaa.gov |
Dataset Point of Contact | NOAA National Centers for Environmental Information
ncei.info@noaa.gov |
Dataset Point of Contact | Data Center Contact
NOAA World Data Service for Paleoclimatology 828-271-4800 paleo@noaa.gov |
Coverage Description | Date Range: 67750 cal yr BP to 6024 cal yr BP; |
Time Period | -65800 to -4074 |
Spatial Bounding Box Coordinates |
N: -79.463
S: -79.463
E: -112.11
W: -112.11
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Spatial Coverage Map |
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Data Presentation Form | Digital table - digital representation of facts or figures systematically displayed, especially in columns
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Dataset Progress Status | Complete - production of the data has been completed |
Data Update Frequency | Data update frequency not available |
Supplemental Information |
STUDY NOTES: Non-sea salt Sulfate (nssS) data for the WAIS Divide ice core, plus volcanic tie points to Antarctic ice cores EPICA Dronning Maud Land, EPICA Dome C, and Talos Dome.
ABSTRACT SUPPLIED BY ORIGINATOR: The mid-latitude westerly winds of the Southern Hemisphere play a central role in the global climate system via Southern Ocean upwelling, carbon exchange with the deep ocean, Agulhas leakage (transport of Indian Ocean waters into the Atlantic) and possibly Antarctic ice-sheet stability. Meridional shifts of the Southern Hemisphere westerly winds have been hypothesized to occur in parallel with the well-documented shifts of the intertropical convergence zone in response to Dansgaard-Oeschger (DO) events- abrupt North Atlantic climate change events of the last ice age. Shifting moisture pathways to West Antarctica are consistent with this view but may represent a Pacific teleconnection pattern forced from the tropics. The full response of the Southern Hemisphere atmospheric circulation to the DO cycle and its impact on Antarctic temperature remain unclear. Here we use five ice cores synchronized via volcanic markers to show that the Antarctic temperature response to the DO cycle can be understood as the superposition of two modes: a spatially homogeneous oceanic 'bipolar seesaw' mode that lags behind Northern Hemisphere climate by about 200 years, and a spatially heterogeneous atmospheric mode that is synchronous with abrupt events in the Northern Hemisphere. Temperature anomalies of the atmospheric mode are similar to those associated with present-day Southern Annular Mode variability, rather than the Pacific-South American pattern. Moreover, deuterium-excess records suggest a zonally coherent migration of the Southern Hemisphere westerly winds over all ocean basins in phase with Northern Hemisphere climate. Our work provides a simple conceptual framework for understanding circum-Antarctic temperature variations forced by abrupt Northern Hemisphere climate change. We provide observational evidence of abrupt shifts in the Southern Hemisphere westerly winds, which have previously documented ramifications for global ocean circulation and atmospheric carbon dioxide. These coupled changes highlight the necessity of a global, rather than a purely North Atlantic, perspective on the DO cycle. |
Purpose | Records of past temperature, precipitation, atmospheric trace gases, and other aspects of climate and environment derived from ice cores drilled on glaciers and ice caps around the world. Parameter keywords describe what was measured in this dataset. Additional summary information can be found in the abstracts of papers listed in the dataset citations. |
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Theme keywords | Global Change Master Directory (GCMD) Science Keywords
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Data Center keywords | Global Change Master Directory (GCMD) Data Center Keywords
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Last Modified: 2024-03-20
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