Effect of Moisture Sources on the Isotopic Composition of Precipitation in Northwest China
Stable isotopes (18O/16O and 2H/1H) are fingerprints of water molecules and thus can be used to gain insight on water circulation. Especially, the factors controlling the isotopic composition of precipitation should be identified because they act as baseline determinants of the isotopic variations o...
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ftmdpi:oai:mdpi.com:/2073-4441/15/8/1584/ 2023-08-20T04:04:41+02:00 Effect of Moisture Sources on the Isotopic Composition of Precipitation in Northwest China Yanlong Kong Ke Wang Sheng Pan Yaqian Ren Weizun Zhang agris 2023-04-19 application/pdf https://doi.org/10.3390/w15081584 EN eng Multidisciplinary Digital Publishing Institute Hydrology https://dx.doi.org/10.3390/w15081584 https://creativecommons.org/licenses/by/4.0/ Water; Volume 15; Issue 8; Pages: 1584 moisture sources stable isotopes precipitation HYSPLIT Northwest China Text 2023 ftmdpi https://doi.org/10.3390/w15081584 2023-08-01T09:44:54Z Stable isotopes (18O/16O and 2H/1H) are fingerprints of water molecules and thus can be used to gain insight on water circulation. Especially, the factors controlling the isotopic composition of precipitation should be identified because they act as baseline determinants of the isotopic variations of surface water and groundwater. Here, using the HYSPLIT model, we attribute observed isotope variations to different moisture sources and characterize the isotopic composition of meteoric precipitation in Northwest China. Results show that the westerlies play a dominant role across the region throughout the year, while other moisture sources only affect some parts of the region during a specific season, i.e., Arctic airflow only affects the Altay Mountains as far as the Middle Tianshan Mountains; the East Asia Monsoon only affects the region east of 100° E longitude during the summer; and summer rainfall of local origin may contribute to the precipitation budget of basin areas. Given the different moisture sources across Northwest China, a local meteoric water line (NWMWL) of δ2H = 6.8δ18O − 1.6 is observed. Our findings not only can provide valuable insights into the mechanism of precipitation isotope fractionation in Northwest China but also can contribute to a better understanding of regional climate and hydrological studies. Text Arctic MDPI Open Access Publishing Arctic Water 15 8 1584 |
institution |
Open Polar |
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MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
moisture sources stable isotopes precipitation HYSPLIT Northwest China |
spellingShingle |
moisture sources stable isotopes precipitation HYSPLIT Northwest China Yanlong Kong Ke Wang Sheng Pan Yaqian Ren Weizun Zhang Effect of Moisture Sources on the Isotopic Composition of Precipitation in Northwest China |
topic_facet |
moisture sources stable isotopes precipitation HYSPLIT Northwest China |
description |
Stable isotopes (18O/16O and 2H/1H) are fingerprints of water molecules and thus can be used to gain insight on water circulation. Especially, the factors controlling the isotopic composition of precipitation should be identified because they act as baseline determinants of the isotopic variations of surface water and groundwater. Here, using the HYSPLIT model, we attribute observed isotope variations to different moisture sources and characterize the isotopic composition of meteoric precipitation in Northwest China. Results show that the westerlies play a dominant role across the region throughout the year, while other moisture sources only affect some parts of the region during a specific season, i.e., Arctic airflow only affects the Altay Mountains as far as the Middle Tianshan Mountains; the East Asia Monsoon only affects the region east of 100° E longitude during the summer; and summer rainfall of local origin may contribute to the precipitation budget of basin areas. Given the different moisture sources across Northwest China, a local meteoric water line (NWMWL) of δ2H = 6.8δ18O − 1.6 is observed. Our findings not only can provide valuable insights into the mechanism of precipitation isotope fractionation in Northwest China but also can contribute to a better understanding of regional climate and hydrological studies. |
format |
Text |
author |
Yanlong Kong Ke Wang Sheng Pan Yaqian Ren Weizun Zhang |
author_facet |
Yanlong Kong Ke Wang Sheng Pan Yaqian Ren Weizun Zhang |
author_sort |
Yanlong Kong |
title |
Effect of Moisture Sources on the Isotopic Composition of Precipitation in Northwest China |
title_short |
Effect of Moisture Sources on the Isotopic Composition of Precipitation in Northwest China |
title_full |
Effect of Moisture Sources on the Isotopic Composition of Precipitation in Northwest China |
title_fullStr |
Effect of Moisture Sources on the Isotopic Composition of Precipitation in Northwest China |
title_full_unstemmed |
Effect of Moisture Sources on the Isotopic Composition of Precipitation in Northwest China |
title_sort |
effect of moisture sources on the isotopic composition of precipitation in northwest china |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2023 |
url |
https://doi.org/10.3390/w15081584 |
op_coverage |
agris |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Water; Volume 15; Issue 8; Pages: 1584 |
op_relation |
Hydrology https://dx.doi.org/10.3390/w15081584 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/w15081584 |
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Water |
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1584 |
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