气候变化领域集成服务门户(CCPortal): Diagnoses of Antarctic Inland Water Cycle Regime: Perspectives From Atmospheric Water Vapor Isotope Observations Along the Transect From Zhongshan Station to Dome A

CCPortal

DOI	10.3389/feart.2022.823515
	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
通讯作者	Liu, JF (通讯作者)，Northwest Normal Univ, Coll Geog & Environm Sci, Lanzhou, Peoples R China. ; Liu, JF (通讯作者)，Peking Univ, Coll Urban & Environm Sci, Beijing, Peoples R China.
发表日期	2022
EISSN	2296-6463
卷号	10
英文摘要	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 delta O-18 and delta D showed a gradual decreasing trend in the interior plateau region with the distance away from the coast, with significant delta O-18-temperature correlation gradient of 1.61 parts per thousand degrees/C and delta O-18-altitude gradient of -2.13 parts per thousand/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 delta O-18, delta 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.
关键词	SURFACE SNOW EAST ANTARCTICA ACCUMULATION VARIABILITY TRAVERSE ORIGIN SIGNAL SCALE FIELD
英文关键词	atmospheric water vapor isotope; Antarctic; Dome Argus; Brewer-Dobson circulation; water cycle
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000768020700001
来源期刊	FRONTIERS IN EARTH SCIENCE
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254685
作者单位	[Liu, Jingfeng] Northwest Normal Univ, Coll Geog & Environm Sci, Lanzhou, Peoples R China; [Liu, Jingfeng] Peking Univ, Coll Urban & Environm Sci, Beijing, Peoples R China; [Du, Zhiheng; Wang, Shimeng] Chinese Acad Sci, Northwest Inst EcoEnvironm & Resources, State Key Lab Cryospher Sci, Lanzhou, Peoples R China; [Zhang, Dongqi] Chinese Acad Meteorol Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Liu, Jingfeng,Du, Zhiheng,Zhang, Dongqi,et al. Diagnoses of Antarctic Inland Water Cycle Regime: Perspectives From Atmospheric Water Vapor Isotope Observations Along the Transect From Zhongshan Station to Dome A[J]. 中国科学院西北生态环境资源研究院,2022,10.
APA	Liu, Jingfeng,Du, Zhiheng,Zhang, Dongqi,&Wang, Shimeng.(2022).Diagnoses of Antarctic Inland Water Cycle Regime: Perspectives From Atmospheric Water Vapor Isotope Observations Along the Transect From Zhongshan Station to Dome A.FRONTIERS IN EARTH SCIENCE,10.
MLA	Liu, Jingfeng,et al."Diagnoses of Antarctic Inland Water Cycle Regime: Perspectives From Atmospheric Water Vapor Isotope Observations Along the Transect From Zhongshan Station to Dome A".FRONTIERS IN EARTH SCIENCE 10(2022).