Influence of regional precipitation patterns on stable isotopes in ice cores from the central Himalayas
Several ice cores have been recovered from the Dasuopu (DSP) Glacier and the East Rongbuk (ER) Glacier in the central Himalayas since the 1990s. Although the distance between the DSP and the ER ice core drilling sites is only 125 km, the stable isotopic record (18O or D) of the DSP core is interpret...
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ftcwashingtonuni:oai:digitalcommons.cwu.edu:cotsfac-1270 2023-05-15T16:38:58+02:00 Influence of regional precipitation patterns on stable isotopes in ice cores from the central Himalayas Pang, H. Hou, S. Kaspari, Susan Mayewski, P. A. 2014-02-25T08:00:00Z application/pdf https://digitalcommons.cwu.edu/cotsfac/270 https://digitalcommons.cwu.edu/cgi/viewcontent.cgi?article=1270&context=cotsfac unknown ScholarWorks@CWU https://digitalcommons.cwu.edu/cotsfac/270 https://digitalcommons.cwu.edu/cgi/viewcontent.cgi?article=1270&context=cotsfac © Author(s) 2014. http://creativecommons.org/licenses/by/3.0/ CC-BY All Faculty Scholarship for the College of the Sciences ice cores Himalayas rain precipitation isotopes Atmospheric Sciences Climate Environmental Sciences Glaciology text 2014 ftcwashingtonuni 2022-10-20T20:29:10Z Several ice cores have been recovered from the Dasuopu (DSP) Glacier and the East Rongbuk (ER) Glacier in the central Himalayas since the 1990s. Although the distance between the DSP and the ER ice core drilling sites is only 125 km, the stable isotopic record (18O or D) of the DSP core is interpreted in previous studies as a temperature proxy, while the ER core is interpreted as a precipitation proxy. Thus, the climatological significance of the stable isotopic records of these Himalayan ice cores remains a subject of debate. Based on analysis of regional precipitation patterns over the region, we find that remarkable discrepancy in precipitation seasonality between the two sites may account for their disparate isotopic interpretations. At the ER core site, the Indian summer monsoon (ISM) precipitation is dominating due to topographic blocking of the moisture from westerlies by the high ridges of Mt. Qomolangma (Everest), which results in a negative correlation between the ER 18O or D record and precipitation amount along the southern slope of the central Himalayas in response to the “amount effect”. At the DSP core site, in comparison with the ISM precipitation, the wintertime precipitation associated with the westerlies is likely more important owing to its local favorable topographic conditions for interacting with the western disturbances. Therefore, the DSP stable isotopic record may be primarily controlled by the westerlies. Our results have important implications for interpreting the stable isotopic ice core records recovered from different climatological regimes of the Himalayas. Text ice core Central Washington University: ScholarWorks Indian |
institution |
Open Polar |
collection |
Central Washington University: ScholarWorks |
op_collection_id |
ftcwashingtonuni |
language |
unknown |
topic |
ice cores Himalayas rain precipitation isotopes Atmospheric Sciences Climate Environmental Sciences Glaciology |
spellingShingle |
ice cores Himalayas rain precipitation isotopes Atmospheric Sciences Climate Environmental Sciences Glaciology Pang, H. Hou, S. Kaspari, Susan Mayewski, P. A. Influence of regional precipitation patterns on stable isotopes in ice cores from the central Himalayas |
topic_facet |
ice cores Himalayas rain precipitation isotopes Atmospheric Sciences Climate Environmental Sciences Glaciology |
description |
Several ice cores have been recovered from the Dasuopu (DSP) Glacier and the East Rongbuk (ER) Glacier in the central Himalayas since the 1990s. Although the distance between the DSP and the ER ice core drilling sites is only 125 km, the stable isotopic record (18O or D) of the DSP core is interpreted in previous studies as a temperature proxy, while the ER core is interpreted as a precipitation proxy. Thus, the climatological significance of the stable isotopic records of these Himalayan ice cores remains a subject of debate. Based on analysis of regional precipitation patterns over the region, we find that remarkable discrepancy in precipitation seasonality between the two sites may account for their disparate isotopic interpretations. At the ER core site, the Indian summer monsoon (ISM) precipitation is dominating due to topographic blocking of the moisture from westerlies by the high ridges of Mt. Qomolangma (Everest), which results in a negative correlation between the ER 18O or D record and precipitation amount along the southern slope of the central Himalayas in response to the “amount effect”. At the DSP core site, in comparison with the ISM precipitation, the wintertime precipitation associated with the westerlies is likely more important owing to its local favorable topographic conditions for interacting with the western disturbances. Therefore, the DSP stable isotopic record may be primarily controlled by the westerlies. Our results have important implications for interpreting the stable isotopic ice core records recovered from different climatological regimes of the Himalayas. |
format |
Text |
author |
Pang, H. Hou, S. Kaspari, Susan Mayewski, P. A. |
author_facet |
Pang, H. Hou, S. Kaspari, Susan Mayewski, P. A. |
author_sort |
Pang, H. |
title |
Influence of regional precipitation patterns on stable isotopes in ice cores from the central Himalayas |
title_short |
Influence of regional precipitation patterns on stable isotopes in ice cores from the central Himalayas |
title_full |
Influence of regional precipitation patterns on stable isotopes in ice cores from the central Himalayas |
title_fullStr |
Influence of regional precipitation patterns on stable isotopes in ice cores from the central Himalayas |
title_full_unstemmed |
Influence of regional precipitation patterns on stable isotopes in ice cores from the central Himalayas |
title_sort |
influence of regional precipitation patterns on stable isotopes in ice cores from the central himalayas |
publisher |
ScholarWorks@CWU |
publishDate |
2014 |
url |
https://digitalcommons.cwu.edu/cotsfac/270 https://digitalcommons.cwu.edu/cgi/viewcontent.cgi?article=1270&context=cotsfac |
geographic |
Indian |
geographic_facet |
Indian |
genre |
ice core |
genre_facet |
ice core |
op_source |
All Faculty Scholarship for the College of the Sciences |
op_relation |
https://digitalcommons.cwu.edu/cotsfac/270 https://digitalcommons.cwu.edu/cgi/viewcontent.cgi?article=1270&context=cotsfac |
op_rights |
© Author(s) 2014. http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
_version_ |
1766029332923285504 |