DOI: 10.1002/2016JD025902
论文题名: The power of vertical geolocation of atmospheric profiles from GNSS radio occultation
作者: Scherllin-Pirscher B. ; Steiner A.K. ; Kirchengast G. ; Schwärz M. ; Leroy S.S.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2017
卷: 122, 期: 3 起始页码: 1595
结束页码: 1616
语种: 英语
英文关键词: atmospheric structure
; different vertical coordinates
; radio occultation
; uncertainty
Scopus关键词: altitude
; atmospheric pressure
; atmospheric structure
; coordinate
; geopotential
; GNSS
; height
; jet stream
; potential temperature
; radio wave
; sea level
; stratosphere-troposphere interaction
; thermodynamics
; tropopause
; uncertainty analysis
英文摘要: High-resolution measurements from Global Navigation Satellite System (GNSS) radio occultation (RO) provide atmospheric profiles with independent information on altitude and pressure. This unique property is of crucial advantage when analyzing atmospheric characteristics that require joint knowledge of altitude and pressure or other thermodynamic atmospheric variables. Here we introduce and demonstrate the utility of this independent information from RO and discuss the computation, uncertainty, and use of RO atmospheric profiles on isohypsic coordinates—mean sea level altitude and geopotential height—as well as on thermodynamic coordinates (pressure and potential temperature). Using geopotential height as vertical grid, we give information on errors of RO-derived temperature, pressure, and potential temperature profiles and provide an empirical error model which accounts for seasonal and latitudinal variations. The observational uncertainty of individual temperature/pressure/potential temperature profiles is about 0.7 K/0.15%/1.4 K in the tropopause region. It gradually increases into the stratosphere and decreases toward the lower troposphere. This decrease is due to the increasing influence of background information. The total climatological error of mean atmospheric fields is, in general, dominated by the systematic error component. We use sampling error-corrected climatological fields to demonstrate the power of having different and accurate vertical coordinates available. As examples we analyze characteristics of the location of the tropopause for geopotential height, pressure, and potential temperature coordinates as well as seasonal variations of the midlatitude jet stream core. This highlights the broad applicability of RO and the utility of its versatile vertical geolocation for investigating the vertical structure of the troposphere and stratosphere. ©2017. The Authors. 资助项目: P27724-NBL
; T620-N29
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62712
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Wegener Center for Climate and Global Change (WEGC) and Institute for Geophysics, Astrophysics, and Meteorology/Institute of Physics, University of Graz, Graz, Austria; Zentralanstalt für Meteorologie und Geodynamik (ZAMG), Vienna, Austria; School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, United States
Recommended Citation:
Scherllin-Pirscher B.,Steiner A.K.,Kirchengast G.,et al. The power of vertical geolocation of atmospheric profiles from GNSS radio occultation[J]. Journal of Geophysical Research: Atmospheres,2017-01-01,122(3)