气候变化领域集成服务门户(CCPortal): Experimental investigation of the stable water isotope distribution in an Alpine lake environment (L-WAIVE)

CCPortal

DOI	10.5194/acp-21-10911-2021
	Experimental investigation of the stable water isotope distribution in an Alpine lake environment (L-WAIVE)
	Chazette P.; Flamant C.; Sodemann H.; Totems J.; Monod A.; Dieudonné E.; Baron A.; Seidl A.; Steen-Larsen H.C.; Doira P.; Durand A.; Ravier S.
发表日期	2021
ISSN	1680-7316
起始页码	10911
结束页码	10937
卷号	21 期号:14
英文摘要	In order to gain understanding on the vertical structure of atmospheric water vapour above mountain lakes and to assess its link with the isotopic composition of the lake water and with small-scale dynamics (i.e. valley winds, thermal convection above complex terrain), the L-WAIVE (Lacustrine-Water vApor Isotope inVentory Experiment) field campaign was conducted in the Annecy valley in the French Alps during 10ĝ€¯d in June 2019. This field campaign was based on an original experimental synergy between a suite of ground-based, boat-borne, and two ultra-light aircraft (ULA) measuring platforms implemented to characterize the thermodynamic and isotopic composition above and in the lake. A cavity ring-down spectrometer and an in-cloud liquid water collector were deployed aboard one of the ULA to characterize the vertical distribution of the main stable water isotopes (H216O, H218O and H2H16O) both in the air and in shallow cumulus clouds. The temporal evolution of the meteorological structures of the low troposphere was derived from an airborne Rayleigh-Mie lidar (embarked on a second ULA), a ground-based Raman lidar, and a wind lidar. ULA flight patterns were repeated several times per day to capture the diurnal evolution as well as the variability associated with the different weather events encountered during the field campaign, which influenced the humidity field, cloud conditions, and slope wind regimes in the valley. In parallel, throughout the campaign, liquid water samples of rain, at the air-lake water interface, and at 2ĝ€¯m depth in the lake were taken. A significant variability of the isotopic composition was observed along time, depending on weather conditions, linked to the transition from the valley boundary layer towards the free troposphere, the valley wind intensity, and the vertical thermal stability. Thus, significant gradients of isotopic content have been revealed at the transition to the free troposphere, at altitudes between 2.5 and 3.5ĝ€¯km. The influence of the lake on the atmosphere isotopic composition is difficult to isolate from other contributions, especially in the presence of thermal instabilities and valley winds. Nevertheless, such an effect appears to be detectable in a layer of about 300ĝ€¯m thickness above the lake in light wind conditions. We also noted similar isotopic compositions in cloud drops and rainwater. © Copyright:
语种	英语
scopus关键词	atmospheric chemistry; boundary layer; experimental study; isotopic composition; lacustrine environment; stable isotope; temporal evolution; thermodynamic property; troposphere; vertical distribution; water vapor; Alps; Auvergne-Rhone-Alpes; France; France; Haute Savoie; Lake Annecy
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246717
作者单位	Université Paris-Saclay, Laboratoire des Sciences du Climat et de l'Environnement (LSCE), CEA-CNRS-UVSQ, UMR CNRS 8212, CEA Saclay, Gif-sur-Yvette, 91191, France; LATMOS/IPSL, Sorbonne Université, UVSQ, CNRS UMR 8190, Paris, France; Bergen and Bjerknes Centre for Climate Research, University of Bergen, Bergen, Norway; Aix Marseille Univ, CNRS, LCE, Marseille, France; Université du Littoral Côte d'Opale, Laboratoire de Physico-Chimie de l'Atmosphère (ULCO/LPCA)59140, France
推荐引用方式 GB/T 7714	Chazette P.,Flamant C.,Sodemann H.,et al. Experimental investigation of the stable water isotope distribution in an Alpine lake environment (L-WAIVE)[J],2021,21(14).
APA	Chazette P..,Flamant C..,Sodemann H..,Totems J..,Monod A..,...&Ravier S..(2021).Experimental investigation of the stable water isotope distribution in an Alpine lake environment (L-WAIVE).ATMOSPHERIC CHEMISTRY AND PHYSICS,21(14).
MLA	Chazette P.,et al."Experimental investigation of the stable water isotope distribution in an Alpine lake environment (L-WAIVE)".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.14(2021).