DOI: 10.1002/2015GL063988
论文题名: Isotope meteorology of cold front passages: A case study combining observations and modeling
作者: Aemisegger F. ; Spiegel J.K. ; Pfahl S. ; Sodemann H. ; Eugster W. ; Wernli H.
刊名: Geophysical Research Letters
ISSN: 0094-9177
EISSN: 1944-8908
出版年: 2015
卷: 42, 期: 13 起始页码: 5652
结束页码: 5660
语种: 英语
英文关键词: below-cloud evaporation
; cold front
; evapotranspiration
; precipitation
; stable water isotopes
Scopus关键词: Evaporation
; Evapotranspiration
; Isotopes
; Precipitation (chemical)
; Rain
; Surface waters
; Below-cloud
; Cold front
; Deuterium excess
; High temporal resolution
; Isotope fractionation
; Numerical sensitivity
; Soil evaporations
; Stable water isotopes
; Precipitation (meteorology)
; atmospheric chemistry
; climate prediction
; cloud droplet
; cold front
; COSMOS
; evapotranspiration
; isotopic fractionation
; precipitation (climatology)
; raindrop
; stable isotope
; water vapor
; Europe
英文摘要: This study investigates the role of below-cloud evaporation and evapotranspiration for the short-term variability of stable isotopes in near-surface water vapor and precipitation associated with central European cold fronts. To this end, a combination of observations with high temporal resolution and numerical sensitivity experiments with the isotope-enabled regional weather prediction model COSMOiso is used. The representation of the interaction between rain droplets and ambient vapor below the cloud is fundamental for adequately simulating precipitation isotopes (δp ) and total rainfall amount. Neglecting these effects leads to depletion biases of 20-40‰ in δp2H and 5-10‰ in δp18O and to an increase of 74% in rainfall amount. Isotope fractionation during soil evaporation is of primary importance for correctly simulating the variability of continental low-level vapor δv2H and δv18O and particularly of the secondary isotope parameter deuterium excess (dv ). Key Points Cold fronts leave characteristic imprint in water vapor and rain isotopes Below-cloud interaction affects rainfall amount and precipitation isotopes at short time scales Soil evaporation fractionation is crucial for isotopes in low-level water vapor. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938203185&doi=10.1002%2f2015GL063988&partnerID=40&md5=7e691e7fd2f7f35bafe936fb909f752d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8793
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland
Recommended Citation:
Aemisegger F.,Spiegel J.K.,Pfahl S.,et al. Isotope meteorology of cold front passages: A case study combining observations and modeling[J]. Geophysical Research Letters,2015-01-01,42(13).