The climatic cyclicity in semiarid-arid central Asia over the past 500,000 years
Central Asia is currently a semiarid-arid region, dominated by the Westerlies. It is important to understand mechanisms of climate and precipitation changes here, as water availability in the region is crucial today and in the future. High-resolution, absolutely-dated oxygen isotope (delta(18)O) rec...
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Online Access: | http://ir.ieecas.cn/handle/361006/10209 https://doi.org/10.1029/2011GL050202 |
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ftchinacascieeca:oai:ir.ieecas.cn:361006/10209 2023-06-11T04:12:42+02:00 The climatic cyclicity in semiarid-arid central Asia over the past 500,000 years Cheng, H (Cheng, H.) 1,2 Zhang, PZ (Zhang, P. Z.) 3 Spotl, C (Spoetl, C.) 4 Edwards, RL (Edwards, R. L.) 2 Cai, YJ (Cai, Y. J.) 5 Zhang, DZ (Zhang, D. Z.) 3 Sang, WC (Sang, W. C.) 3 Tan, M (Tan, M.) 6 An, ZS (An, Z. S.) 5 2012-01-13 http://ir.ieecas.cn/handle/361006/10209 https://doi.org/10.1029/2011GL050202 英语 eng GEOPHYSICAL RESEARCH LETTERS http://ir.ieecas.cn/handle/361006/10209 doi:10.1029/2011GL050202 null 期刊论文 2012 ftchinacascieeca https://doi.org/10.1029/2011GL050202 2023-05-08T13:23:34Z Central Asia is currently a semiarid-arid region, dominated by the Westerlies. It is important to understand mechanisms of climate and precipitation changes here, as water availability in the region is crucial today and in the future. High-resolution, absolutely-dated oxygen isotope (delta(18)O) records of stalagmites from Kesang Cave characterize a dynamic precipitation history over most of the past 500,000 years. This record demonstrates, for the first time, that climate change in the region exhibits a processional rhythm with abrupt inceptions of low delta(18)O speleothem growth at times of high Northern Hemisphere summer insolation followed by gradual delta(18)O increases that track decreases of insolation. These observations and interpretations contrast with the interpretation of nearby, but higher elevation ice core records. The absolutely-dated cave delta(18)O shifts can be used to correlate the regional climate variability by providing chronological marks. Combined with other paleoclimate records, the Kesang observations suggest that possible incursions of Asian summer monsoon rainfall or related moisture into the Kesang site and/or adjacent areas during the high insolation times may play an important role in changing orbital-scale hydrology of the region. Based on our record, arid climate will prevail in this region for the next several millennia, providing that anthropogenic effects do not supersede natural processes. Report ice core Institute of Earth Environment: IEECAS OpenIR (Chinese Academy of Sciences) Geophysical Research Letters 39 1 n/a n/a |
institution |
Open Polar |
collection |
Institute of Earth Environment: IEECAS OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchinacascieeca |
language |
English |
description |
Central Asia is currently a semiarid-arid region, dominated by the Westerlies. It is important to understand mechanisms of climate and precipitation changes here, as water availability in the region is crucial today and in the future. High-resolution, absolutely-dated oxygen isotope (delta(18)O) records of stalagmites from Kesang Cave characterize a dynamic precipitation history over most of the past 500,000 years. This record demonstrates, for the first time, that climate change in the region exhibits a processional rhythm with abrupt inceptions of low delta(18)O speleothem growth at times of high Northern Hemisphere summer insolation followed by gradual delta(18)O increases that track decreases of insolation. These observations and interpretations contrast with the interpretation of nearby, but higher elevation ice core records. The absolutely-dated cave delta(18)O shifts can be used to correlate the regional climate variability by providing chronological marks. Combined with other paleoclimate records, the Kesang observations suggest that possible incursions of Asian summer monsoon rainfall or related moisture into the Kesang site and/or adjacent areas during the high insolation times may play an important role in changing orbital-scale hydrology of the region. Based on our record, arid climate will prevail in this region for the next several millennia, providing that anthropogenic effects do not supersede natural processes. |
format |
Report |
author |
Cheng, H (Cheng, H.) 1,2 Zhang, PZ (Zhang, P. Z.) 3 Spotl, C (Spoetl, C.) 4 Edwards, RL (Edwards, R. L.) 2 Cai, YJ (Cai, Y. J.) 5 Zhang, DZ (Zhang, D. Z.) 3 Sang, WC (Sang, W. C.) 3 Tan, M (Tan, M.) 6 An, ZS (An, Z. S.) 5 |
spellingShingle |
Cheng, H (Cheng, H.) 1,2 Zhang, PZ (Zhang, P. Z.) 3 Spotl, C (Spoetl, C.) 4 Edwards, RL (Edwards, R. L.) 2 Cai, YJ (Cai, Y. J.) 5 Zhang, DZ (Zhang, D. Z.) 3 Sang, WC (Sang, W. C.) 3 Tan, M (Tan, M.) 6 An, ZS (An, Z. S.) 5 The climatic cyclicity in semiarid-arid central Asia over the past 500,000 years |
author_facet |
Cheng, H (Cheng, H.) 1,2 Zhang, PZ (Zhang, P. Z.) 3 Spotl, C (Spoetl, C.) 4 Edwards, RL (Edwards, R. L.) 2 Cai, YJ (Cai, Y. J.) 5 Zhang, DZ (Zhang, D. Z.) 3 Sang, WC (Sang, W. C.) 3 Tan, M (Tan, M.) 6 An, ZS (An, Z. S.) 5 |
author_sort |
Cheng, H (Cheng, H.) 1,2 |
title |
The climatic cyclicity in semiarid-arid central Asia over the past 500,000 years |
title_short |
The climatic cyclicity in semiarid-arid central Asia over the past 500,000 years |
title_full |
The climatic cyclicity in semiarid-arid central Asia over the past 500,000 years |
title_fullStr |
The climatic cyclicity in semiarid-arid central Asia over the past 500,000 years |
title_full_unstemmed |
The climatic cyclicity in semiarid-arid central Asia over the past 500,000 years |
title_sort |
climatic cyclicity in semiarid-arid central asia over the past 500,000 years |
publishDate |
2012 |
url |
http://ir.ieecas.cn/handle/361006/10209 https://doi.org/10.1029/2011GL050202 |
genre |
ice core |
genre_facet |
ice core |
op_relation |
GEOPHYSICAL RESEARCH LETTERS http://ir.ieecas.cn/handle/361006/10209 doi:10.1029/2011GL050202 |
op_rights |
null |
op_doi |
https://doi.org/10.1029/2011GL050202 |
container_title |
Geophysical Research Letters |
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39 |
container_issue |
1 |
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1768388729894862848 |