DOI: 10.1002/2017JD026704
论文题名: Assessment of COSMIC radio occultation and AIRS hyperspectral IR sounder temperature products in the stratosphere using observed radiances
作者: Feltz M.L. ; Knuteson R.O. ; Revercomb H.E.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2017
卷: 122, 期: 16 起始页码: 8593
结束页码: 8616
语种: 英语
英文关键词: AIRS
; COSMIC
; radiances
; radio occultation
; stratosphere
; temperature
英文摘要: Upper air temperature is defined as an essential climate variable by the World Meteorological Organization. Two remote sensing technologies being promoted for monitoring stratospheric temperatures are GPS radio occultation (RO) and spectrally resolved IR radiances. This study assesses RO and hyperspectral IR sounder derived temperature products within the stratosphere by comparing IR spectra calculated from GPS RO and IR sounder products to coincident IR observed radiances, which are used as a reference standard. RO dry temperatures from the University Corporation for Atmospheric Research (UCAR) Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC) mission are compared to NASA Atmospheric Infrared Sounder (AIRS) retrievals using a previously developed profile-to-profile collocation method and vertical temperature averaging kernels. Brightness temperatures (BTs) are calculated for both COSMIC and AIRS temperature products and are then compared to coincident AIRS measurements. The COSMIC calculated minus AIRS measured BTs exceed the estimated 0.5 K measurement uncertainty for the winter time extratropics around 35 hPa. These differences are attributed to seasonal UCAR COSMIC biases. Unphysical vertical oscillations are seen in the AIRS L2 temperature product in austral winter Antarctic regions, and results imply a small AIRS tropical warm bias around ~35 hPa in the middle stratosphere. ©2017. American Geophysical Union. All Rights Reserved. 资助项目: NA10NES4400013
; NNX15AC26G
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62585
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: Space Science and Engineering Center, University of Wisconsin-Madison, Madison, WI, United States
Recommended Citation:
Feltz M.L.,Knuteson R.O.,Revercomb H.E.. Assessment of COSMIC radio occultation and AIRS hyperspectral IR sounder temperature products in the stratosphere using observed radiances[J]. Journal of Geophysical Research: Atmospheres,2017-01-01,122(16)