气候变化领域集成服务门户(CCPortal): Tritium as a hydrological tracer in Mediterranean precipitation events

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DOI	10.5194/acp-20-3555-2020
	Tritium as a hydrological tracer in Mediterranean precipitation events
	Juhlke T.R.; Sültenfuß J.; Trachte K.; Huneau F.; Garel E.; Santoni S.; Barth J.A.C.; Van Geldern R.
发表日期	2020
ISSN	1680-7316
起始页码	3555
结束页码	3568
卷号	20 期号:6
英文摘要	Climate models are in need of improved constraints for water vapor transport in the atmosphere, and tritium can serve as a powerful tracer in the hydrological cycle. Although the general principles of tritium distribution and transfer processes within and between the various hydrological compartments are known, variation on short timescales and aspects of altitude dependence are still under debate. To address questions regarding tritium sources, sinks, and transfer processes, the sampling of individual precipitation events in Corte on the island of Corsica in the Mediterranean Sea was performed between April 2017 and April 2018. Tritium concentrations of 46 event samples were compared to their moisture origin and corresponding air mass history. Air mass back-trajectories were generated from the novel high-resolution ERA5 dataset from the ECMWF (European Centre for Medium-Range Weather Forecasts). Geographical source regions with similar tritium concentrations were predefined using generally known tritium distribution patterns, such as the "continental effect", and from data records derived at long-term measurement stations of tritium in precipitation across the working area. Our model-derived source region tritium concentrations agreed well with annual mean station values. Moisture that originated from continental Europe and the Atlantic Ocean was most distinct regarding tritium concentrations with values up to 8.8 TU (tritium units) and near 0 TU, respectively. The seasonality of tritium values ranged from 1.6 TU in January to 10.1 TU in May, and they exhibited well-known elevated concentrations in spring and early summer due to increased stratosphere-troposphere exchange. However, this pattern was interrupted by extreme events. The average altitude of trajectories was correlated with the tritium concentrations in precipitation, especially in spring and early summer and if outlier values of extreme tritium concentrations were excluded. However, in combination with the trajectory information, these outlier values proved to be valuable for improving the comprehension of tritium movement in the atmosphere. Our work shows how event-based tritium research can advance the understanding of its distribution in the atmosphere. © 2020 BMJ Publishing Group. All rights reserved.
语种	英语
scopus关键词	concentration (composition); hydrological cycle; precipitation quality; tracer; tritium; water vapor; British Columbia; Canada; Corse; Cortes Island; Discovery Islands; France; Mediterranean Sea
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/141457
作者单位	GeoZentrum Nordbayern, Department Geographie und Geowissenschaften, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schlossgarten 5, Erlangen, 91054, Germany; Institut für Umweltphysik, Universität Bremen, Otto Hahn Allee 1, Bremen, 28355, Germany; Institute for Environmental Sciences, Brandenburg University of Technology (BTU), Cottbus-Senftenberg, 03044, Germany; Université de Corse Pascal Paoli, Faculté des Sciences et Techniques, Département d'Hydrogéologie, Campus Grimaldi, BP 52, Corte, 20250, France; CNRS, UMR 6134 SPE, Corte, 20250, France
推荐引用方式 GB/T 7714	Juhlke T.R.,Sültenfuß J.,Trachte K.,et al. Tritium as a hydrological tracer in Mediterranean precipitation events[J],2020,20(6).
APA	Juhlke T.R..,Sültenfuß J..,Trachte K..,Huneau F..,Garel E..,...&Van Geldern R..(2020).Tritium as a hydrological tracer in Mediterranean precipitation events.Atmospheric Chemistry and Physics,20(6).
MLA	Juhlke T.R.,et al."Tritium as a hydrological tracer in Mediterranean precipitation events".Atmospheric Chemistry and Physics 20.6(2020).