NOAA/WDS Paleoclimatology - Guoqu Glacier Ice Core, Tibet 70 Year Major Ions 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 Ice Core. The data include parameters of ice cores with a geographic location of Asia. The time period coverage is from 15 to -54 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data.
Dataset Citation
- Cite as: Grigholm, B.; Mayewski, P.A.; Kang, S.; Zhang, Y.; Kaspari, S.; Sneed, S.; Zhang, Q. (2011-07-12): NOAA/WDS Paleoclimatology - Guoqu Glacier Ice Core, Tibet 70 Year Major Ions Data. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/5hvp-f447. Accessed [date].
- Please refer to Credit tab for full citation information.
Dataset Identifiers
- doi:10.25921/5hvp-f447
- noaa-icecore-11818
- NCEI DSI 1200_02
- NCEI DSI 1200_01
ISO 19115-2 Metadata
noaa-icecore-11818
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Ordering Instructions | Contact NCEI for other distribution options and instructions. |
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: 1935 CE to 2004 CE; Date Range: 15 cal yr BP to -54 cal yr BP; |
Time Period | 1935 to 2004 |
Spatial Bounding Box Coordinates |
West: 91.1765
East: 91.1765
South: 33.5772
North: 33.5772
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Data Presentation Form | Digital table - digital representation of facts or figures systematically displayed, especially in columns |
Dataset Progress Status | Complete - production of the data has been completed |
Data Update Frequency | Data update frequency not available |
Supplemental Information | STUDY NOTES: High resolution (Annual Median Concentrations) Na+, K+, Mg2+, Ca2+, Cl-,NO3-, SO42- from the 2005 Guoqu Glacier ice core from northern side of Mt. Geladaindong, central Tibetan Plateau. ABSTRACT SUPPLIED BY ORIGINATOR: In autumn 2005, a joint expedition between the University of Maine and the Institute of Tibetan Plateau Research recovered three ice cores from Guoqu Glacier (33°34'37.8"N, 91°10'35.3"E, 5720 m above sea level) on the northern side of Mt. Geladaindong, central Tibetan Plateau. Isotopes (d18O), major soluble ions (Na+, K+, Mg2+, Ca2+, Cl-, NO3-,SO4 2-), and radionuclide (b-activity) measurements from one of the cores revealed a 70-year record (1935–2005). Statistical analysis of major ion time series suggests that atmospheric soluble dust species dominate the chemical signature and that background dust levels conceal marine ion species deposition. The soluble dust time series have interspecies relations and common structure (empirical orthogonal function (EOF) 1), suggesting a similar soluble dust source or transport route. Annual and seasonal correlations between the EOF 1 time series and National Centers for Environmental Prediction/National Center for Atmospheric Research reanalysis climate variables (1948–2004) suggest that the Mt. Geladaindong ice core record provides a proxy for local and regional surface pressure. An approximately threefold decrease of soluble dust concentrations in the middle to late 1970s, accompanied by regional increases in pressure and temperature and decreases in wind velocity, coincides with the major 1976-1977 shift of the Pacific Decadal Oscillation (PDO) from a negative to a positive state. This is the first ice core evidence of a potential teleconnection between central Asian atmospheric soluble dust loading and the PDO. Analysis of temporally longer ice cores from Mt. Geladaindong may enhance understanding of the relationship between the PDO and central Asian atmospheric circulation and subsequent atmospheric soluble dust loading. |
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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Global Change Master Directory (GCMD) Science Keywords
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Last Modified: 2024-04-16
For questions about the information on this page, please email: ncei.info@noaa.gov
For questions about the information on this page, please email: ncei.info@noaa.gov