DOI: 10.1029/2012JD018496
论文题名: Very high cloud detection in more than two decades of HIRS data
作者: Kolat U. ; Menzel W.P. ; Olson E. ; Frey R.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 8 起始页码: 3278
结束页码: 3284
语种: 英语
英文关键词: CALIOP
; HIRS
; upper tropospheric/lower stratospheric clouds
Scopus关键词: Clouds
; Infrared radiation
; Optical radar
; Sensors
; Brightness temperatures
; CALIOP
; Cloud-aerosol lidar with orthogonal polarizations
; Global data assimilation system
; HIRS
; National centers for environmental predictions
; Polar-orbiting satellites
; Stratospheric clouds
; Carbon dioxide
; brightness temperature
; cloud
; data assimilation
; decadal variation
; intertropical convergence zone
; Metop-A
; NOAA satellite
; satellite data
; stratosphere
; TOVS
; troposphere
英文摘要: This paper reports on the use of High-resolution Infrared Radiation Sounder (HIRS) measurements to infer the presence of upper tropospheric and lower stratospheric (UT/LS) clouds. UT/LS cloud detection is based on the fact that, when viewing an opaque UT/LS cloud that fills the sensor field of view, positive lapse rates above the tropopause cause a more absorbing CO2 or H2 O-sensitive spectral band to measure a brightness temperature warmer than that of a less absorbing or nearly transparent infrared window spectral band. The HIRS sensor has flown on 16 polar-orbiting satellites from TIROS-N through NOAA-19 and Metop-A and -B, forming the only 30 year record that includes H2 O and CO2 -sensitive spectral bands enabling the detection of these UT/LS clouds. Comparison with collocated Cloud-Aerosol Lidar with Orthogonal Polarization data reveals that 97% of the HIRS UT/LS cloud determinations are within 2.5 km of the tropopause (defined as the coldest level in the National Centers for Environmental Prediction Global Data Assimilation System); more clouds are found above the tropopause than below. From NOAA-14 data spanning 1995 through 2005, we find indications of UT/LS clouds in 0.7% of the observations from 60N to 60S using CO2 absorption bands; however, in the region of the Inter-Tropical Convergence Zone (ITCZ), this increases to 1.7%. During El Niño years, UT/LS clouds shift eastward out of their normal location in the western Pacific region. Monthly trends from 1987 through 2011 using data from NOAA-10 onwards show decreases in UT/LS cloud detection in the region of the ITCZ from 1987 until 1996, increases until 2001, and decreases thereafter. ©2012. 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/63794
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: Cooperative Institute for Meteorological Satellite Studies, Space Science and Engineering Center, University of Wisconsin-Madison, 1225 West Dayton Street, Madison WI, United States
Recommended Citation:
Kolat U.,Menzel W.P.,Olson E.,et al. Very high cloud detection in more than two decades of HIRS data[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(8)