气候变化领域集成服务门户(CCPortal): Trends of atmospheric water vapour in Switzerland from ground-based radiometry, FTIR and GNSS data

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DOI	10.5194/acp-20-11223-2020
	Trends of atmospheric water vapour in Switzerland from ground-based radiometry, FTIR and GNSS data
	Bernet L.; Brockmann E.; Von Clarmann T.; Kämpfer N.; Mahieu E.; Mätzler C.; Stober G.; Hocke K.
发表日期	2020
ISSN	1680-7316
起始页码	11223
结束页码	11244
卷号	20 期号:19
英文摘要	Vertically integrated water vapour (IWV) is expected to increase globally in a warming climate. To determine whether IWV increases as expected on a regional scale, we present IWV trends in Switzerland from ground-based remote sensing techniques and reanalysis models, considering data for the time period 1995 to 2018. We estimate IWV trends from a ground-based microwave radiometer in Bern, from a Fourier transform infrared (FTIR) spectrometer at Jungfraujoch, from reanalysis data (ERA5 and MERRA-2) and from Swiss ground-based Global Navigation Satellite System (GNSS) stations. Using a straightforward trend method, we account for jumps in the GNSS data, which are highly sensitive to instrumental changes. We found that IWV generally increased by 2% per decade to 5% per decade, with deviating trends at some GNSS stations. Trends were significantly positive at 17% of all GNSS stations, which often lie at higher altitudes (between 850 and 1650m above sea level). Our results further show that IWV in Bern scales to air temperature as expected (except in winter), but the IWVerature relation based on reanalysis data in the whole of Switzerland is not clear everywhere. In addition to our positive IWV trends, we found that the radiometer in Bern agrees within 5% with GNSS and reanalyses. At the Jungfraujoch high-altitude station, we found a mean difference of 0.26mm (15%) between the FTIR and coincident GNSS data, improving to 4% after an antenna update in 2016. In general, we showed that ground-based GNSS data are highly valuable for climate monitoring, given that the data have been homogeneously reprocessed and that instrumental changes are accounted for. We found a response of IWV to rising temperature in Switzerland, which is relevant for projected changes in local cloud and precipitation processes. © 2020 Author(s).
语种	英语
scopus关键词	FTIR spectroscopy; GNSS; precipitation (climatology); precipitation assessment; radiometer; remote sensing; satellite data; satellite imagery; trend analysis; Bern [Switzerland]; Switzerland
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/247500
作者单位	Institute of Applied Physics, University of Bern, Bern, Switzerland; Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland; Federal Office of Topography, swisstopo, Wabern, Switzerland; Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany; Institute of Astrophysics and Geophysics, University of Liège, Liège, Belgium
推荐引用方式 GB/T 7714	Bernet L.,Brockmann E.,Von Clarmann T.,et al. Trends of atmospheric water vapour in Switzerland from ground-based radiometry, FTIR and GNSS data[J],2020,20(19).
APA	Bernet L..,Brockmann E..,Von Clarmann T..,Kämpfer N..,Mahieu E..,...&Hocke K..(2020).Trends of atmospheric water vapour in Switzerland from ground-based radiometry, FTIR and GNSS data.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(19).
MLA	Bernet L.,et al."Trends of atmospheric water vapour in Switzerland from ground-based radiometry, FTIR and GNSS data".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.19(2020).