DOI: 10.1002/2014GL061524
论文题名: Deriving dynamics from GPS radio occultation: Three-dimensional wind fields for monitoring the climate
作者: Scherllin-Pirscher B. ; Steiner A.K. ; Kirchengast G.
刊名: Geophysical Research Letters
ISSN: 0094-9700
EISSN: 1944-9431
出版年: 2014
卷: 41, 期: 20 起始页码: 7367
结束页码: 7374
语种: 英语
英文关键词: climate change
; climate variability
; geostrophic wind
; GPS radio occultation
; gradient wind
; troposphere and stratosphere
Scopus关键词: Climate change
; Global positioning system
; Radio
; Troposphere
; Wind
; Atmospheric analysis
; Climate variability
; Climatological winds
; Geo-potential heights
; Geostrophic winds
; GPS radio occultations
; Horizontal resolution
; Isobaric surfaces
; Meteorology
; climate change
; climate variation
; climatology
; data set
; environmental monitoring
; geostrophic flow
; GPS
; measurement method
; stratosphere
; three-dimensional modeling
; troposphere
; wind field
英文摘要: Global Positioning System (GPS) radio occultation (RO) measurements are proven highly useful for observing the thermal structure of the troposphere and stratosphere. Here we use RO data for the first time to derive climatological wind fields from sampling error-corrected geopotential height fields on isobaric surfaces from about 800 hPa to 3 hPa. We find monthly mean RO geostrophic wind and gradient wind fields (2007 to 2012, about 500 km horizontal resolution, outside tropics) to clearly capture all main wind features, with differences to atmospheric analysis winds being, in general, smaller than 2 m/s. Larger differences (up to 10 m/s) occur close to the subtropical jet where RO winds underestimate actual winds. Such biases are caused by the geostrophic and gradient wind approximations, while RO retrieval errors introduce negligible effect. These results demonstrate that RO wind fields are of high quality and can provide new information on troposphere-stratosphere dynamics, for the benefit of monitoring the climate from weekly to decadal scales. Key PointsExtratropical wind fields were derived from GPS radio occultation (RO) dataRO geostrophic and gradient winds well represent actual 3-D wind fieldsThe monthly mean RO wind fields are, in general, accurate to within 2 m/s ©2014. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911372746&doi=10.1002%2f2014GL061524&partnerID=40&md5=eb546518634623789950b8c372812885
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6964
Appears in Collections: 气候减缓与适应
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作者单位: Wegener Center for Climate and Global Change (WEGC), Institute for Geophysics, Astrophysics, and Meteorology, University of Graz, Graz, Austria
Recommended Citation:
Scherllin-Pirscher B.,Steiner A.K.,Kirchengast G.. Deriving dynamics from GPS radio occultation: Three-dimensional wind fields for monitoring the climate[J]. Geophysical Research Letters,2014-01-01,41(20).