HIRDLS and CALIPSO observations of tropical cirrus

被引：43

作者：

Massie, Steven T. ^{[1
]}

Gille, John ^{[1
,2
]}

Craig, Cheryl ^{[1
]}

Khosravi, Rashid ^{[1
]}

Barnett, John ^{[3
]}

Read, William ^{[4
]}

Winker, David ^{[5
]}

机构：

[1] Natl Ctr Atmospher Res, Div Atmospher Chem, Boulder, CO 80307 USA

[2] Univ Colorado, Ctr Limb Atmospher Sounding, Boulder, CO 80309 USA

[3] Univ Oxford, Dept Atmospher Ocean & Planetary Phys, Oxford OX1 3PU, England

[4] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[5] NASA, Langley Res Ctr, Hampton, VA 23681 USA

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES | 2010年 / 115卷

基金：

美国国家科学基金会; 美国国家航空航天局;

关键词：

EXPERIMENT II OBSERVATIONS; GROUND-BASED LIDAR; STRATOSPHERIC AEROSOL; TROPOPAUSE; CLOUDS; LAYER; LITE;

D O I：

10.1029/2009JD012100

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

High Resolution Dynamics Limb Sounder (HIRDLS) and Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) measurements of cirrus frequency of occurrence in the upper tropical troposphere are quantified for September 2006 to August 2007. Monthly geospatial averages of cloud frequency of occurrence between 90 and 177 hPa are similar and correlate well with Microwave Limb Sounder (MLS) relative humidity with respect to ice (RHI) data, though clouds are present at individual RHI values less than 100%, due to the 5, 1, and sub-1 km vertical resolutions of the MLS, HIRDLS, and CALIPSO experiments. Seasonal variations in cloud frequency of occurrence are similar, with largest frequencies during winter (December-February). Though the CALIPSO and HIRDLS experiments employ nadir-and limb-viewing observational geometries, respectively, CALIPSO horizontal scales of cirrus are frequently larger than 100 km, and therefore similarities are present in the geospatial distributions of cloud occurrence. Isolated laminar cirrus is most prevalent away from the equator. The monthly patterns of HIRDLS and CALIPSO cloud occurrence are archived for useful comparisons to climate models.

引用

页数：15

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