DOI: 10.1002/2016GL069936
论文题名: Tropopause sharpening by data assimilation
作者: Pilch Kedzierski R. ; Neef L. ; Matthes K.
刊名: Geophysical Research Letters
ISSN: 0094-8785
EISSN: 1944-8516
出版年: 2016
卷: 43, 期: 15 起始页码: 8298
结束页码: 8305
语种: 英语
英文关键词: Data Assimilation increments
; ERA-Interim and ECMWF operational
; Tropopause Inversion Layer
Scopus关键词: Clouds
; Cosmology
; Forecasting
; Inversion layers
; Data assimilation
; Data assimilation systems
; Era interims
; European centre for medium-range weather forecasts
; GPS radio occultations
; High resolution observations
; Operational analysis
; Operational forecast system
; Weather forecasting
英文摘要: Data assimilation was recently suggested to smooth out the sharp gradients that characterize the tropopause inversion layer (TIL) in systems that did not assimilate TIL-resolving observations. We investigate whether this effect is present in the ERA-Interim reanalysis and the European Centre for Medium-Range Weather Forecasts (ECMWF) operational forecast system (which assimilate high-resolution observations) by analyzing the 4D-Var increments and how the TIL is represented in their data assimilation systems. For comparison, we also diagnose the TIL from high-resolution GPS radio occultation temperature profiles from the COSMIC satellite mission, degraded to the same vertical resolution as ERA-Interim and ECMWF operational analyses. Our results show that more recent reanalysis and forecast systems improve the representation of the TIL, updating the earlier hypothesis. However, the TIL in ERA-Interim and ECMWF operational analyses is still weaker and farther away from the tropopause than GPS radio occultation observations of the same vertical resolution. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84982924436&doi=10.1002%2f2016GL069936&partnerID=40&md5=973d7a10f9e8c8c1d14dd54643c419d8
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9748
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: Marine Meteorology Department, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Recommended Citation:
Pilch Kedzierski R.,Neef L.,Matthes K.. Tropopause sharpening by data assimilation[J]. Geophysical Research Letters,2016-01-01,43(15).