|
Read Full Article (file size: 1033456 bytes) Cited by
JOURNAL OF GEOPHYSICAL RESEARCH,
VOL. 112,
D24S31,
doi:10.1029/2007JD008788,
2007
High Resolution Dynamics Limb Sounder observations of polar stratospheric clouds and subvisible cirrus
Steven Massie
National Center for Atmospheric Research, Boulder, Colorado, USA
John Gille
National Center for Atmospheric Research, Boulder, Colorado, USA
Rashid Khosravi
National Center for Atmospheric Research, Boulder, Colorado, USA
Hyunah Lee
National Center for Atmospheric Research, Boulder, Colorado, USA
Douglas Kinnison
National Center for Atmospheric Research, Boulder, Colorado, USA
Gene Francis
National Center for Atmospheric Research, Boulder, Colorado, USA
Bruno Nardi
National Center for Atmospheric Research, Boulder, Colorado, USA
Thomas Eden
National Center for Atmospheric Research, Boulder, Colorado, USA
Cheryl Craig
National Center for Atmospheric Research, Boulder, Colorado, USA
Chris Halvorson
National Center for Atmospheric Research, Boulder, Colorado, USA
Michael Coffey
National Center for Atmospheric Research, Boulder, Colorado, USA
Daniel Packman
National Center for Atmospheric Research, Boulder, Colorado, USA
Charles Cavanaugh
National Center for Atmospheric Research, Boulder, Colorado, USA
James Craft
Center for Limb Atmospheric Sounding, University of Colorado, Boulder, Colorado, USA
Vincil Dean
Center for Limb Atmospheric Sounding, University of Colorado, Boulder, Colorado, USA
David Ellis
Center for Limb Atmospheric Sounding, University of Colorado, Boulder, Colorado, USA
John Barnett
Department of Physics, University of Oxford, Oxford, UK
Christopher Hepplewhite
Department of Physics, University of Oxford, Oxford, UK
Alyn Lambert
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA
Gloria Manney
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA
Anthony Strawa
NASA Ames Research Center, Moffett Field, California, USA
Marion Legg
Bay Area Environmental Research Institute, Sonoma, California, USA
Abstract
The High Resolution Dynamics Limb Sounder (HIRDLS) cloud detection and cloud top determination algorithm is described and
applied to 2005–2007 HIRDLS radiance profiles. Statistical averages of HIRDLS and correlative cloud data are highly correlated.
The 1998–2005 Halogen Occultation Experiment (HALOE) and HIRDLS time averaged cloud top pressures have a correlation coefficient
of 0.87 and 0.93 in the tropics and midlatitudes, respectively. Time series of the temperature T < 195 K hemispherical area,
on the 450 K potential temperature surface, and the total number of polar stratospheric clouds observed by the HIRDLS experiment
in January and February 2005 have a correlation coefficient of 0.92. HALOE and HIRDLS normalized distributions of cloud counts,
expressed as a function of outgoing longwave radiation (OLR), have a correlation coefficient of 0.99. Tropical averages of
1998–2005 HALOE and HIRDLS cloud occurrence frequencies at 82 and 100 hPa are within 25% of each other, and the morphology
of latitude-longitude contour maps of cloud frequency are similar. Colocated Stratospheric Aerosol and Gas Experiment (SAGE
III) and HIRDLS cloud top pressure values in 2005 have a correlation coefficient of 0.85 when the distance between observations
is less than 100 km and the time difference is less than 6 h. Correlations between colocated SAGE III and HIRDLS cloud top
pressures improve as space and time differences decrease.
Received 12
April
2007;
accepted 12
September
2007;
published 15
December
2007.
Keywords: satellite;
clouds;
validation.
Index Terms: 0305 Atmospheric Composition and Structure: Aerosols and particles (0345, 4801, 4906); 0345 Atmospheric Composition and Structure: Pollution: urban and regional (0305, 0478, 4251); 0320 Atmospheric Composition and Structure: Cloud physics and chemistry.
Read Full Article (file size: 1033456 bytes) Cited by
Citation: Massie, S., et al.
(2007),
High Resolution Dynamics Limb Sounder observations of polar stratospheric clouds and subvisible cirrus,
J. Geophys. Res.,
112,
D24S31,
doi:10.1029/2007JD008788.
Copyright 2007 by the American Geophysical Union.
|