DOI: 10.1175/JCLI-D-15-0418.1
Scopus记录号: 2-s2.0-84949959477
论文题名: Linear trends and closures of 10-yr observations of AIRS stratospheric channels
作者: Pan F. ; Huang X. ; Strow L.L. ; Guo H.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 22 起始页码: 8939
结束页码: 8950
语种: 英语
Scopus关键词: Carbon dioxide
; Climate models
; Financial data processing
; Infrared devices
; Principal component analysis
; Radiative transfer
; Remote sensing
; Upper atmosphere
; Atmospheric infrared sounders
; Confidence interval
; Long-wave radiation
; Principal Components
; Radiative transfer model
; Temperature retrieval
; Trends
; Variability
; Infrared instruments
英文摘要: The Atmospheric Infrared Sounder (AIRS) level-1b radiances have been shown to be well calibrated (~0.3 K or higher) and have little secular drift (~4 mK yr-1) since operation started in September 2002. This paper investigates the linear trends of 10 years (2003-12) of AIRS global-mean radiances in the CO2 v2 band that are sensitive to emissions from the stratosphere (stratospheric channels). AIRS lower-stratospheric channels have a cooling trend of no more than 0.23 K decade-1 whereas the midstratospheric channels consistently show a statistically significant cooling trend as large as 0.58 K decade-1. The 95% confidence interval for the trend is ~±0.20 K decade-1. Two sets of synthetic AIRS radiances are computed using the principal component-based radiative transfer model (PCRTM), one based on a free-running GFDL Atmospheric Model, version 3 (AM3), over the same period and one based on ERA-Interim. The GFDL AM3 simulations overestimate the cooling trends in the mid- to upper-stratospheric channels but slightly underestimate them in the lower-stratospheric channels. The synthetic radiances based on ERA-Interim, however, have statistically significant positive trends at virtually all stratospheric channels. This confirms the challenge to the GCM modeling and reanalysis community to create a better simulation or assimilation of the stratospheric climate. It is shown that the linear trends in AIRS radiances can be reproduced to a large extent by the spectral radiative kernel technique and the trends from the AIRS L2 temperature retrievals and from the change of CO2. This suggests a closure between AIRS L1 radiances and L2 retrievals and the potential merit of AIRS data in studies of stratosphere changes. © 2015 American Meteorological Society. 资助项目: NASA, National Aeronautics and Space Administration
; NASA, National Aeronautics and Space Administration
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50902
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI, United States; Department of Physics, University of Maryland, Baltimore County, Baltimore, MD, United States; UCAR Visiting Scientist Programs, NOAA/Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States
Recommended Citation:
Pan F.,Huang X.,Strow L.L.,et al. Linear trends and closures of 10-yr observations of AIRS stratospheric channels[J]. Journal of Climate,2015-01-01,28(22)