DOI: 10.1002/2013JD020325
论文题名: Evaluation and assimilation of ATMS data in the ECMWF system
作者: Bormann N. ; Fouilloux A. ; Bell W.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 23 起始页码: 12970
结束页码: 12980
语种: 英语
英文关键词: ATMS
; data assimilation
; microwave sounder
; S-NPP
Scopus关键词: Data processing
; Microwave acoustics
; Sounding apparatus
; Weather forecasting
; Advanced Microwave Sounding Unit-A
; Advanced technology microwave sounders
; Antenna pattern corrections
; ATMS
; Data assimilation
; European centre for medium-range weather forecasts
; Microwave sounder
; S-NPP
; Monitoring
; calibration
; data assimilation
; data quality
; data set
; error analysis
; model validation
; noise
; Northern Hemisphere
; Southern Hemisphere
; weather forecasting
英文摘要: This paper reports on the first experiences with Advanced Technology Microwave Sounder (ATMS) data at the European Centre for Medium-Range Weather Forecasts (ECMWF), both in terms of the contribution to the calibration/ validation exercise and in terms of initial assimilation trials. Comparisons in antenna temperature space against short-term forecasts are used to establish the fidelity of the data. Monitoring of ATMS data against short-term forecasts shows that the data are generally of good quality, with a noise performance that is well within specification and after appropriate averaging, comparable to or better than that of the Advanced Microwave Sounding Unit-A (AMSU-A). Biases vary smoothly with scan positions, even before an appropriate antenna pattern correction has been established, and ATMS looks better than AMSU-A in this regard. Outer scan positions can be assimilated without restrictions due to biases, and together with the wider swath, this leads to a better coverage from one ATMS compared to one AMSU-A. There are indications of larger interchannel and spatial error correlations in ATMS data than for AMSU-A, possibly linked to a weak striping effect. The analysis and forecast impact in initial assimilation trials over two seasons are significantly positive in the short range over the Southern Hemisphere and in the long range over the Northern Hemisphere, with an otherwise overall neutral impact. Experiments in the context of a depleted observing system suggest that ATMS gives a comparable forecast impact to that from a single AMSU-A/Microwave Humidity Sounder combination. Key Points ATMS data are of expected quality They have a small positive forecast impact in a full DA system In a depleted system, the impact is comparable to that of one AMSU-A/MHS ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63108
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: ECMWF, Reading RG2 9AX, United Kingdom; Met Office, Exeter, United Kingdom
Recommended Citation:
Bormann N.,Fouilloux A.,Bell W.. Evaluation and assimilation of ATMS data in the ECMWF system[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(23)