Central Himalayan tree-ring isotopes reveal increasing regional heterogeneity and enhancement in ice mass loss since the 1960s
Tree-ring δ18O values are a sensitive proxy for regional physical climate, while their δ13C values are a strong predictor of local ecohydrology. Utilizing available ice-core and tree-ring δ18O records from the central Himalaya (CH), we found an increase in east–west climate heterogeneity since the 1...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00055190 2023-05-15T16:39:12+02:00 Central Himalayan tree-ring isotopes reveal increasing regional heterogeneity and enhancement in ice mass loss since the 1960s Singh, Nilendu Shekhar, Mayank Singh, Jayendra Gupta, Anil K. Bräuning, Achim Mayr, Christoph Singhal, Mohit 2021-01 electronic https://doi.org/10.5194/tc-15-95-2021 https://noa.gwlb.de/receive/cop_mods_00055190 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00054841/tc-15-95-2021.pdf https://tc.copernicus.org/articles/15/95/2021/tc-15-95-2021.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-15-95-2021 https://noa.gwlb.de/receive/cop_mods_00055190 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00054841/tc-15-95-2021.pdf https://tc.copernicus.org/articles/15/95/2021/tc-15-95-2021.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2021 ftnonlinearchiv https://doi.org/10.5194/tc-15-95-2021 2022-02-08T22:34:40Z Tree-ring δ18O values are a sensitive proxy for regional physical climate, while their δ13C values are a strong predictor of local ecohydrology. Utilizing available ice-core and tree-ring δ18O records from the central Himalaya (CH), we found an increase in east–west climate heterogeneity since the 1960s. Further, δ13C records from transitional western glaciated valleys provide a robust basis for reconstructing about 3 centuries of glacier mass balance (GMB) dynamics. We reconstructed annually resolved GMB since 1743 CE based on regionally dominant tree species of diverse plant functional types. Three major phases became apparent: positive GMB up to the mid-19th century, the middle phase (1870–1960) of slightly negative but stable GMB, and an exponential ice mass loss since the 1960s. Reasons for accelerated mass loss are largely attributed to anthropogenic climate change, including concurrent alterations in atmospheric circulations (weakening of the westerlies and the Arabian Sea branch of the Indian summer monsoon). Multi-decadal isotopic and climate coherency analyses specify an eastward declining influence of the westerlies in the monsoon-dominated CH region. Besides, our study provides a long-term context for recent GMB variability, which is essential for its reliable projection and attribution. Article in Journal/Newspaper ice core The Cryosphere Niedersächsisches Online-Archiv NOA Indian The Cryosphere 15 1 95 112 |
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article Verlagsveröffentlichung Singh, Nilendu Shekhar, Mayank Singh, Jayendra Gupta, Anil K. Bräuning, Achim Mayr, Christoph Singhal, Mohit Central Himalayan tree-ring isotopes reveal increasing regional heterogeneity and enhancement in ice mass loss since the 1960s |
topic_facet |
article Verlagsveröffentlichung |
description |
Tree-ring δ18O values are a sensitive proxy for regional physical climate, while their δ13C values are a strong predictor of local ecohydrology. Utilizing available ice-core and tree-ring δ18O records from the central Himalaya (CH), we found an increase in east–west climate heterogeneity since the 1960s. Further, δ13C records from transitional western glaciated valleys provide a robust basis for reconstructing about 3 centuries of glacier mass balance (GMB) dynamics. We reconstructed annually resolved GMB since 1743 CE based on regionally dominant tree species of diverse plant functional types. Three major phases became apparent: positive GMB up to the mid-19th century, the middle phase (1870–1960) of slightly negative but stable GMB, and an exponential ice mass loss since the 1960s. Reasons for accelerated mass loss are largely attributed to anthropogenic climate change, including concurrent alterations in atmospheric circulations (weakening of the westerlies and the Arabian Sea branch of the Indian summer monsoon). Multi-decadal isotopic and climate coherency analyses specify an eastward declining influence of the westerlies in the monsoon-dominated CH region. Besides, our study provides a long-term context for recent GMB variability, which is essential for its reliable projection and attribution. |
format |
Article in Journal/Newspaper |
author |
Singh, Nilendu Shekhar, Mayank Singh, Jayendra Gupta, Anil K. Bräuning, Achim Mayr, Christoph Singhal, Mohit |
author_facet |
Singh, Nilendu Shekhar, Mayank Singh, Jayendra Gupta, Anil K. Bräuning, Achim Mayr, Christoph Singhal, Mohit |
author_sort |
Singh, Nilendu |
title |
Central Himalayan tree-ring isotopes reveal increasing regional heterogeneity and enhancement in ice mass loss since the 1960s |
title_short |
Central Himalayan tree-ring isotopes reveal increasing regional heterogeneity and enhancement in ice mass loss since the 1960s |
title_full |
Central Himalayan tree-ring isotopes reveal increasing regional heterogeneity and enhancement in ice mass loss since the 1960s |
title_fullStr |
Central Himalayan tree-ring isotopes reveal increasing regional heterogeneity and enhancement in ice mass loss since the 1960s |
title_full_unstemmed |
Central Himalayan tree-ring isotopes reveal increasing regional heterogeneity and enhancement in ice mass loss since the 1960s |
title_sort |
central himalayan tree-ring isotopes reveal increasing regional heterogeneity and enhancement in ice mass loss since the 1960s |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/tc-15-95-2021 https://noa.gwlb.de/receive/cop_mods_00055190 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00054841/tc-15-95-2021.pdf https://tc.copernicus.org/articles/15/95/2021/tc-15-95-2021.pdf |
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Indian |
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Indian |
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ice core The Cryosphere |
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ice core The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-15-95-2021 https://noa.gwlb.de/receive/cop_mods_00055190 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00054841/tc-15-95-2021.pdf https://tc.copernicus.org/articles/15/95/2021/tc-15-95-2021.pdf |
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https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
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CC-BY |
op_doi |
https://doi.org/10.5194/tc-15-95-2021 |
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The Cryosphere |
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15 |
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95 |
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