Diagnoses of Antarctic Inland Water Cycle Regime: Perspectives From Atmospheric Water Vapor Isotope Observations Along the Transect From Zhongshan Station to Dome A
Water stable isotopes are crucial for paleoclimate reconstruction and water cycle tracing in Antarctica. Accurate measurement of atmospheric water vapor isotopic composition of hydrogen and oxygen is required urgently for understanding the processes controlling the atmosphere–snow interaction and as...
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Online Access: | http://dx.doi.org/10.3389/feart.2022.823515 https://www.frontiersin.org/articles/10.3389/feart.2022.823515/full |
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crfrontiers:10.3389/feart.2022.823515 2024-02-11T09:57:53+01:00 Diagnoses of Antarctic Inland Water Cycle Regime: Perspectives From Atmospheric Water Vapor Isotope Observations Along the Transect From Zhongshan Station to Dome A Liu, Jingfeng Du, Zhiheng Zhang, Dongqi Wang, Shimeng 2022 http://dx.doi.org/10.3389/feart.2022.823515 https://www.frontiersin.org/articles/10.3389/feart.2022.823515/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Earth Science volume 10 ISSN 2296-6463 General Earth and Planetary Sciences journal-article 2022 crfrontiers https://doi.org/10.3389/feart.2022.823515 2024-01-26T09:56:24Z Water stable isotopes are crucial for paleoclimate reconstruction and water cycle tracing in Antarctica. Accurate measurement of atmospheric water vapor isotopic composition of hydrogen and oxygen is required urgently for understanding the processes controlling the atmosphere–snow interaction and associated isotope fractionation. This study presents in situ real-time measurements of water vapor isotopes along the transect from Zhongshan Station to Dome Argus (hereafter Dome A) in East Antarctica for the first time. The results reveal that the surface vapor stable isotopes of δ 18 O and δ D showed a gradual decreasing trend in the interior plateau region with the distance away from the coast, with significant δ 18 O-temperature correlation gradient of 1.61‰°/C and δ 18 O-altitude gradient of –2.13‰/100 m. Meanwhile, d-excess gradually arises with elevation rise. Moreover, the spatial variation of vapor isotopic composition displays three different characters implying different atmosphere circulation backgrounds controlling the inland water cycle; it can be divided as the coastal steep area below 2,000 m, a vast inland area with an elevation varied between 2,000 and 3,000 m, and high central plateau. Thirdly, observed high inland Antarctica water vapor d-excess quantitatively confirms stratosphere air intrusion and vapor derived from low latitudes by Brewer–Dobson circulation. Finally, the diurnal cycle signals of interior area water vapor isotopes δ 18 O, δ D, and air temperature highlighted the substantial domination of the supersaturation sublimation/condensation effect in inland, and this suggests that fractionation occurs during sublimation and vapor–snow exchanges should no longer be considered insignificant for the isotopic composition of near-surface snow in Antarctica. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Frontiers (Publisher) Antarctic Dome Argus ENVELOPE(77.000,77.000,-81.000,-81.000) East Antarctica Zhongshan ENVELOPE(76.371,76.371,-69.373,-69.373) Zhongshan Station ENVELOPE(76.371,76.371,-69.373,-69.373) Frontiers in Earth Science 10 |
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General Earth and Planetary Sciences |
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General Earth and Planetary Sciences Liu, Jingfeng Du, Zhiheng Zhang, Dongqi Wang, Shimeng Diagnoses of Antarctic Inland Water Cycle Regime: Perspectives From Atmospheric Water Vapor Isotope Observations Along the Transect From Zhongshan Station to Dome A |
topic_facet |
General Earth and Planetary Sciences |
description |
Water stable isotopes are crucial for paleoclimate reconstruction and water cycle tracing in Antarctica. Accurate measurement of atmospheric water vapor isotopic composition of hydrogen and oxygen is required urgently for understanding the processes controlling the atmosphere–snow interaction and associated isotope fractionation. This study presents in situ real-time measurements of water vapor isotopes along the transect from Zhongshan Station to Dome Argus (hereafter Dome A) in East Antarctica for the first time. The results reveal that the surface vapor stable isotopes of δ 18 O and δ D showed a gradual decreasing trend in the interior plateau region with the distance away from the coast, with significant δ 18 O-temperature correlation gradient of 1.61‰°/C and δ 18 O-altitude gradient of –2.13‰/100 m. Meanwhile, d-excess gradually arises with elevation rise. Moreover, the spatial variation of vapor isotopic composition displays three different characters implying different atmosphere circulation backgrounds controlling the inland water cycle; it can be divided as the coastal steep area below 2,000 m, a vast inland area with an elevation varied between 2,000 and 3,000 m, and high central plateau. Thirdly, observed high inland Antarctica water vapor d-excess quantitatively confirms stratosphere air intrusion and vapor derived from low latitudes by Brewer–Dobson circulation. Finally, the diurnal cycle signals of interior area water vapor isotopes δ 18 O, δ D, and air temperature highlighted the substantial domination of the supersaturation sublimation/condensation effect in inland, and this suggests that fractionation occurs during sublimation and vapor–snow exchanges should no longer be considered insignificant for the isotopic composition of near-surface snow in Antarctica. |
format |
Article in Journal/Newspaper |
author |
Liu, Jingfeng Du, Zhiheng Zhang, Dongqi Wang, Shimeng |
author_facet |
Liu, Jingfeng Du, Zhiheng Zhang, Dongqi Wang, Shimeng |
author_sort |
Liu, Jingfeng |
title |
Diagnoses of Antarctic Inland Water Cycle Regime: Perspectives From Atmospheric Water Vapor Isotope Observations Along the Transect From Zhongshan Station to Dome A |
title_short |
Diagnoses of Antarctic Inland Water Cycle Regime: Perspectives From Atmospheric Water Vapor Isotope Observations Along the Transect From Zhongshan Station to Dome A |
title_full |
Diagnoses of Antarctic Inland Water Cycle Regime: Perspectives From Atmospheric Water Vapor Isotope Observations Along the Transect From Zhongshan Station to Dome A |
title_fullStr |
Diagnoses of Antarctic Inland Water Cycle Regime: Perspectives From Atmospheric Water Vapor Isotope Observations Along the Transect From Zhongshan Station to Dome A |
title_full_unstemmed |
Diagnoses of Antarctic Inland Water Cycle Regime: Perspectives From Atmospheric Water Vapor Isotope Observations Along the Transect From Zhongshan Station to Dome A |
title_sort |
diagnoses of antarctic inland water cycle regime: perspectives from atmospheric water vapor isotope observations along the transect from zhongshan station to dome a |
publisher |
Frontiers Media SA |
publishDate |
2022 |
url |
http://dx.doi.org/10.3389/feart.2022.823515 https://www.frontiersin.org/articles/10.3389/feart.2022.823515/full |
long_lat |
ENVELOPE(77.000,77.000,-81.000,-81.000) ENVELOPE(76.371,76.371,-69.373,-69.373) ENVELOPE(76.371,76.371,-69.373,-69.373) |
geographic |
Antarctic Dome Argus East Antarctica Zhongshan Zhongshan Station |
geographic_facet |
Antarctic Dome Argus East Antarctica Zhongshan Zhongshan Station |
genre |
Antarc* Antarctic Antarctica East Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica |
op_source |
Frontiers in Earth Science volume 10 ISSN 2296-6463 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/feart.2022.823515 |
container_title |
Frontiers in Earth Science |
container_volume |
10 |
_version_ |
1790593424380919808 |