气候变化领域集成服务门户(CCPortal): A 4.5 Year-Long Record of Svalbard Water Vapor Isotopic Composition Documents Winter Air Mass Origin

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DOI	10.1029/2020JD032681
	A 4.5 Year-Long Record of Svalbard Water Vapor Isotopic Composition Documents Winter Air Mass Origin
	Leroy-Dos Santos C.; Masson-Delmotte V.; Casado M.; Fourré E.; Steen-Larsen H.C.; Maturilli M.; Orsi A.; Berchet A.; Cattani O.; Minster B.; Gherardi J.; Landais A.
发表日期	2020
ISSN	2169897X
卷号	125 期号:23
英文摘要	From May 2014 to September 2018, a laser spectrometer analyzer provided a 4.5 years continuous record of water vapor isotopic composition at Ny-Ålesund (8 m above sea level, a.s.l.), Svalbard. It corresponds to the longest data set published in polar regions. A comparison of this data set with a parallel similar data set obtained during 20 days by a second laser spectrometer installed near Mount Zeppelin (474 m a.s.l.) shows that this data set is representative of a regional signal. In addition, the observation of insignificant diurnal cycles in the isotopic signal compared to the strong isotopic signature of synoptic events and the comparison of simultaneous measurements in the vapor and in rain or snow samples lead to the conclusion that our record reflects a large part of the regional dynamics of the atmospheric water cycle driven by large-scale variability. This study focuses on winters dominated by the occurrence of synoptic events associated with humidity peaks. Using statistics and back trajectories calculations, we link high humidity peaks characterized by an anticorrelation between δ18O and d-excess in the water vapor to a rapid shift of air mass source regions from the Arctic to the North Atlantic Ocean below 60°N. On the other hand, correlation between δ18O and d-excess may be associated with a shift of air mass sources within the Arctic. These results demonstrate the added value of long-term water vapor isotopic monitoring to better understand the moisture origin in the Arctic and the atmospheric dynamics. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	air mass origin; Arctic atmospheric circulation; moisture transport; Svalbard; synoptic events; water isotopes
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185604
作者单位	Laboratoire des Sciences du Climat et de l'Environnement, UMR CEA-CNRS-UVSQ/IPSL, Gif-sur-Yvette, France; Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany; Geophysical Institute, University of Bergen, Bergen, Norway; Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research, Potsdam, Germany
推荐引用方式 GB/T 7714	Leroy-Dos Santos C.,Masson-Delmotte V.,Casado M.,et al. A 4.5 Year-Long Record of Svalbard Water Vapor Isotopic Composition Documents Winter Air Mass Origin[J],2020,125(23).
APA	Leroy-Dos Santos C..,Masson-Delmotte V..,Casado M..,Fourré E..,Steen-Larsen H.C..,...&Landais A..(2020).A 4.5 Year-Long Record of Svalbard Water Vapor Isotopic Composition Documents Winter Air Mass Origin.Journal of Geophysical Research: Atmospheres,125(23).
MLA	Leroy-Dos Santos C.,et al."A 4.5 Year-Long Record of Svalbard Water Vapor Isotopic Composition Documents Winter Air Mass Origin".Journal of Geophysical Research: Atmospheres 125.23(2020).