Atmospheric Soluble Dust Records from a Tibetan Ice Core: Possible Climate Proxies and Teleconnection With the Pacific Decadal Oscillation
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 degrees 34'37.80 '' N, 91 degrees 10'35.3 '' E, 5720 m above sea level) on the northern side of Mt. Geladain...
Published in: | Journal of Geophysical Research: Atmospheres |
---|---|
Main Authors: | , , , , , , |
Format: | Text |
Language: | unknown |
Published: |
DigitalCommons@UMaine
2009
|
Subjects: | |
Online Access: | https://digitalcommons.library.umaine.edu/ers_facpub/14 https://doi.org/10.1029/2008JD011242 https://digitalcommons.library.umaine.edu/context/ers_facpub/article/1013/viewcontent/mayewski_109_d20118.pdf |
id |
ftmaineuniv:oai:digitalcommons.library.umaine.edu:ers_facpub-1013 |
---|---|
record_format |
openpolar |
spelling |
ftmaineuniv:oai:digitalcommons.library.umaine.edu:ers_facpub-1013 2024-09-15T18:11:56+00:00 Atmospheric Soluble Dust Records from a Tibetan Ice Core: Possible Climate Proxies and Teleconnection With the Pacific Decadal Oscillation Grigholm, B. Mayewski, Paul Andrew Kang, Shichang Zhang, Y. Kaspari, S. Sneed, Sharon B. Zhang, Q. 2009-10-30T07:00:00Z application/pdf https://digitalcommons.library.umaine.edu/ers_facpub/14 https://doi.org/10.1029/2008JD011242 https://digitalcommons.library.umaine.edu/context/ers_facpub/article/1013/viewcontent/mayewski_109_d20118.pdf unknown DigitalCommons@UMaine https://digitalcommons.library.umaine.edu/ers_facpub/14 doi:10.1029/2008JD011242 https://digitalcommons.library.umaine.edu/context/ers_facpub/article/1013/viewcontent/mayewski_109_d20118.pdf This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. In addition, no permission is required from the rights-holder(s) for educational uses. For other uses, you need to obtain permission from the rights-holder(s). Earth Science Faculty Scholarship Earth Sciences text 2009 ftmaineuniv https://doi.org/10.1029/2008JD011242 2024-07-24T05:38:40Z 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 degrees 34'37.80 '' N, 91 degrees 10'35.3 '' E, 5720 m above sea level) on the northern side of Mt. Geladaindong, central Tibetan Plateau. Isotopes ( delta(18)O), major soluble ions (Na(+), K(+), Mg(2+), Ca(2+), Cl(-), NO(3)(-), SO(4)(2-)), and radionuclide (beta-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. Text ice core The University of Maine: DigitalCommons@UMaine Journal of Geophysical Research: Atmospheres 114 D20 |
institution |
Open Polar |
collection |
The University of Maine: DigitalCommons@UMaine |
op_collection_id |
ftmaineuniv |
language |
unknown |
topic |
Earth Sciences |
spellingShingle |
Earth Sciences Grigholm, B. Mayewski, Paul Andrew Kang, Shichang Zhang, Y. Kaspari, S. Sneed, Sharon B. Zhang, Q. Atmospheric Soluble Dust Records from a Tibetan Ice Core: Possible Climate Proxies and Teleconnection With the Pacific Decadal Oscillation |
topic_facet |
Earth Sciences |
description |
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 degrees 34'37.80 '' N, 91 degrees 10'35.3 '' E, 5720 m above sea level) on the northern side of Mt. Geladaindong, central Tibetan Plateau. Isotopes ( delta(18)O), major soluble ions (Na(+), K(+), Mg(2+), Ca(2+), Cl(-), NO(3)(-), SO(4)(2-)), and radionuclide (beta-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. |
format |
Text |
author |
Grigholm, B. Mayewski, Paul Andrew Kang, Shichang Zhang, Y. Kaspari, S. Sneed, Sharon B. Zhang, Q. |
author_facet |
Grigholm, B. Mayewski, Paul Andrew Kang, Shichang Zhang, Y. Kaspari, S. Sneed, Sharon B. Zhang, Q. |
author_sort |
Grigholm, B. |
title |
Atmospheric Soluble Dust Records from a Tibetan Ice Core: Possible Climate Proxies and Teleconnection With the Pacific Decadal Oscillation |
title_short |
Atmospheric Soluble Dust Records from a Tibetan Ice Core: Possible Climate Proxies and Teleconnection With the Pacific Decadal Oscillation |
title_full |
Atmospheric Soluble Dust Records from a Tibetan Ice Core: Possible Climate Proxies and Teleconnection With the Pacific Decadal Oscillation |
title_fullStr |
Atmospheric Soluble Dust Records from a Tibetan Ice Core: Possible Climate Proxies and Teleconnection With the Pacific Decadal Oscillation |
title_full_unstemmed |
Atmospheric Soluble Dust Records from a Tibetan Ice Core: Possible Climate Proxies and Teleconnection With the Pacific Decadal Oscillation |
title_sort |
atmospheric soluble dust records from a tibetan ice core: possible climate proxies and teleconnection with the pacific decadal oscillation |
publisher |
DigitalCommons@UMaine |
publishDate |
2009 |
url |
https://digitalcommons.library.umaine.edu/ers_facpub/14 https://doi.org/10.1029/2008JD011242 https://digitalcommons.library.umaine.edu/context/ers_facpub/article/1013/viewcontent/mayewski_109_d20118.pdf |
genre |
ice core |
genre_facet |
ice core |
op_source |
Earth Science Faculty Scholarship |
op_relation |
https://digitalcommons.library.umaine.edu/ers_facpub/14 doi:10.1029/2008JD011242 https://digitalcommons.library.umaine.edu/context/ers_facpub/article/1013/viewcontent/mayewski_109_d20118.pdf |
op_rights |
This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. In addition, no permission is required from the rights-holder(s) for educational uses. For other uses, you need to obtain permission from the rights-holder(s). |
op_doi |
https://doi.org/10.1029/2008JD011242 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
114 |
container_issue |
D20 |
_version_ |
1810449524400848896 |