NOAA/WDS Paleoclimatology - Chinese Loess Plateau 60KYr Grain Size Data
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 Loess and Eolian Dust. The data include parameters of loess and paleosol with a geographic location of China, Eastern Asia. The time period coverage is from 60100 to 2000 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: Sun, Y.; Clemens, S.C.; Morrill, C.; Lin, X.P.; Wang, X.L.; An, Z. (2012-05-30): NOAA/WDS Paleoclimatology - Chinese Loess Plateau 60KYr Grain Size Data. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/60kr-fk43. Accessed [date].
- Please refer to Credit tab for full citation information.
- doi:10.25921/60kr-fk43
- noaa-loess-12971
- NCEI DSI 1200_02
- NCEI DSI 1200_01
noaa-loess-12971
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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: 60100 cal yr BP to 2000 cal yr BP; |
Time Period | -58150 to -50 |
Spatial Bounding Box Coordinates |
N: 37.49
S: 36.35
E: 104.6
W: 102.88
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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: Grain size data for the past 60,000 years from 2 loess sections in the northwestern Chinese Loess Plateau. 20-m sampling pits were excavated at Jingyuan and Gulang, with age models developed via 40 optically stimulated luminescence (OSL) measurements. Grain size was measured on 2000 samples taken at 2-cm. intervals. Grain size data is interpreted as a winter monsoon strength proxy. Jingyuan, Chinese Loess Plateau: 36.35°N, 104.6°E, 2210 m elev. Gulang, Chinese Loess Plateau: 37.49°N, 102.88°E, 2400 m elev.
ABSTRACT SUPPLIED BY ORIGINATOR: The last glacial period was characterized by abrupt, millennial-scale climate change. These climate fluctuations are particularly pronounced in records of the East Asian monsoon system, and seem to be linked to changes in North Atlantic circulation. Here we present records of grain size variations from the northwestern Chinese Loess Plateau, dated using optically stimulated luminescence. We reconstruct changes in the strength of the East Asian winter monsoon over the past 60,000 years and find reconstructed millennial-scale variations that are broadly correlated with temperature variations over Greenland, suggesting a common forcing. We investigate the effect of a slow-down of Atlantic meridional overturning circulation on the monsoon system using a coupled climate model simulation with added freshwater flux into the northern North Atlantic, and find a strengthening winter monsoon circulation over the regions that supply dust to the Loess Plateau and a reduction in summer monsoon precipitation over East Asia. We conclude that Atlantic meridional overturning circulation is a driver of abrupt change in the East Asian winter and summer monsoon systems, and that the northern westerlies play a role in transmitting this signal from the North Atlantic to the Asian monsoon regions. |
Purpose | Records of past environment derived from Loess and Eolian dust (silt-sized material deposited on the Earth surface by the surface winds. 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: 2024-02-20
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