noaa-icecore-11818
Guoqu Glacier Ice Core, Tibet 70 Year Major Ions Data
Grigholm, B.; Mayewski, P.A.; Kang, S.; Zhang, Y.; Kaspari, S.; Sneed, S.; Zhang, Q.
Guoqu Glacier Ice Core, Tibet 70 Year Major Ions Data
2011-07-12
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/11818
Investigator
B.
Grigholm
Investigator
P.A.
Mayewski
Investigator
S.
Kang
Investigator
Y.
Zhang
Investigator
S.
Kaspari
Investigator
S.
Sneed
Investigator
Q.
Zhang
earth science
paleoclimate
ice cores
ice age,null,null,year Common Era,null,ice cores,null,null,N,null
earth science
paleoclimate
ice cores
calcium,bulk ice,null,microgram per liter,null,ice cores,null,null,N,median
earth science
paleoclimate
ice cores
chloride,bulk ice,null,microgram per liter,null,ice cores,null,null,N,median
earth science
paleoclimate
ice cores
potassium,bulk ice,null,microgram per liter,null,ice cores,null,null,N,median
earth science
paleoclimate
ice cores
sodium,bulk ice,null,microgram per liter,null,ice cores,null,null,N,median
earth science
paleoclimate
ice cores
depth,null,null,meter,null,ice cores,null,null,N,null
earth science
paleoclimate
ice cores
nitrate,bulk ice,null,microgram per liter,null,ice cores,null,null,N,median
earth science
paleoclimate
ice cores
magnesium,bulk ice,null,microgram per liter,null,ice cores,null,null,N,median
earth science
paleoclimate
ice cores
sulfate,bulk ice,null,microgram per liter,null,ice cores,null,null,N,median
earth science
paleoclimate
ice core
chemistry
geoscientificInformation
1935 AD
2004 AD
15 cal yr BP
-54 cal yr BP
Complete
33.5772
33.5772
91.1765
91.1765
5720
5720
Continent
Asia
Guoqu Glacier>LATITUDE 33.5772>LONGITUDE 91.1765
None
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English
DOC/NOAA/NESDIS/NCEI
National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
https://www.ncdc.noaa.gov/data-access/paleoclimatology-data
DATA Center Contact
Bruce
Bauer
bruce.a.bauer@noaa.gov
paleo@noaa.gov
303-497-6280
303-497-6513
325 Broadway, E/NE31
Boulder
CO
80305-3328
USA
online
ASCII
Grigholm, B., P.A. Mayewski, S. Kang, Y. Zhang, S. Kaspari,
S.B. Sneed, and Q. Zhang. 2009.
Atmospheric soluble dust records from a Tibetan ice core:
Possible climate proxies and teleconnection with the
Pacific Decadal Oscillation.
Journal of Geophysical Research, 114, D20118,
doi:10.1029/2008JD011242
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.
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.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/guoqu/guoqu2009.xls
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/guoqu/guoqu2009.txt
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11