DOI: 10.1002/jgrd.50483
论文题名: Validation of AIRS/AMSU-A water vapor and temperature data with in situ aircraft observations from the surface to UT/LS from 87°N-67°S
作者: Diao M. ; Jumbam L. ; Sheffield J. ; Wood E.F. ; Zondlo M.A.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 12 起始页码: 6816
结束页码: 6836
语种: 英语
英文关键词: AIRS
; AMSU
; relative humidity
; validation
; water vapor
Scopus关键词: Air
; Aircraft
; Atmospheric humidity
; Errors
; Infrared devices
; Infrared instruments
; Sounding apparatus
; AMSU
; Atmospheric infrared sounders
; Microwave sounding unit
; Significant differences
; Temperature differences
; Temperature sensitivity
; validation
; Water vapor concentration
; Water vapor
; aircraft
; boundary layer
; comparative study
; concentration (composition)
; data set
; error analysis
; information management
; marine atmosphere
; water vapor
英文摘要: Validation of the Atmospheric Infrared Sounder (AIRS)/Advanced Microwave Sounding Unit (AMSU-A) data set with in situ observations provides useful information on its application to climate and weather studies. However, different space/time averaging windows have been used in past studies, and questions remain on the variation of errors in space, such as between land/ocean and the Northern/Southern Hemispheres. In this study, in situ aircraft measurements of water vapor and temperature are compared with the AIRS/AMSU-A retrievals (Version 5 Level 2) from 87°N to 67°S and from the surface to the upper troposphere and lower stratosphere (UT/LS). By using a smaller comparison window (1 h and 22.5 km) than previous studies, we show that the absolute percentage difference of water vapor (|dH2 Operc|) is ~20-60% and the absolute temperature difference (|dTemp|) is ~1.0-2.5 K. The land retrievals show improvements versus Version 4 by ~5% in water vapor concentration and ~0.2 K in temperature at 200-800 mbar. The land (ocean) retrievals are colder and drier (warmer and moister) than the in situ observations in the boundary layer, warmer and drier (warmer and moister) at the UT/LS. No significant differences between hemispheres are noted. Overall, future comparisons are suggested to be done within 4 h and 100 km in order to keep the errors from window sizes within ~10%. To constrain the uncertainties in previous validation results, we show that every 22.5 km (or 1 h) increment in window sizes contributes to ~2% |dH2 Operc| and ~0.1 K |dTemp| increases. Key Points Improved validation of AIRS/AMSU-A water vapor and temperature Sensitivity of validation of space/time windows studied New validations over land, ocean, and Southern Hemisphere © 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/63659
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: Department of Civil and Environmental Engineering, Princeton University, E206A Engineering Quad., Princeton, NJ 08544, United States; Center for Mid-Infrared Technologies for Health and the Environment, Princeton University, Princeton, NJ, United States; Sonoma Technology, Inc., Petaluma, CA, United States
Recommended Citation:
Diao M.,Jumbam L.,Sheffield J.,et al. Validation of AIRS/AMSU-A water vapor and temperature data with in situ aircraft observations from the surface to UT/LS from 87°N-67°S[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(12)