Extinction-ice water content-effective radius algorithms for CALIPSO

Andrew J. Heymsfield; Dave Winker; Gerd Jan van Zadelhoff

doi:10.1029/2005GL022742

Extinction-ice water content-effective radius algorithms for CALIPSO

Andrew J. Heymsfield
, Dave Winker
, Gerd Jan van Zadelhoff

Dynamical and Physical Meteorology

NASA Langley Research Center
Royal Netherlands Meteorological Institute

Research output: Contribution to journal › Article › peer-review

67 Scopus citations

Abstract

Interrelationships between volume extinction coefficient (σ), ice water content (IWC), and effective radius (r_e), each dependent upon the particle size distribution (PSD) and temperature (T), are developed using in-situ microphysical measurements at low and midlatitudes, remote sensing data, and model results. The ratio [IWC /σ], proportional to r_e, increases with T. Lower values of [IWC/σ] are observed near cloud top and base than within a cloud layer, although [IWC/σ] changes more with temperature than relative height within the cloud. For equivalent radar reflectivities (Z_e) below about -28 dB, the minimum detectable with forthcoming spaceborne cloud radar, [IWC/σ] is a nearly constant value. IWC increases almost linearly with σ, with a temperature-dependence noted.

Original language	English
Pages (from-to)	1-4
Number of pages	4
Journal	Geophysical Research Letters
Volume	32
Issue number	10
DOIs	https://doi.org/10.1029/2005GL022742
State	Published - May 28 2005

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abstract = "Interrelationships between volume extinction coefficient (σ), ice water content (IWC), and effective radius (re), each dependent upon the particle size distribution (PSD) and temperature (T), are developed using in-situ microphysical measurements at low and midlatitudes, remote sensing data, and model results. The ratio [IWC /σ], proportional to re, increases with T. Lower values of [IWC/σ] are observed near cloud top and base than within a cloud layer, although [IWC/σ] changes more with temperature than relative height within the cloud. For equivalent radar reflectivities (Ze) below about -28 dB, the minimum detectable with forthcoming spaceborne cloud radar, [IWC/σ] is a nearly constant value. IWC increases almost linearly with σ, with a temperature-dependence noted.",

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N2 - Interrelationships between volume extinction coefficient (σ), ice water content (IWC), and effective radius (re), each dependent upon the particle size distribution (PSD) and temperature (T), are developed using in-situ microphysical measurements at low and midlatitudes, remote sensing data, and model results. The ratio [IWC /σ], proportional to re, increases with T. Lower values of [IWC/σ] are observed near cloud top and base than within a cloud layer, although [IWC/σ] changes more with temperature than relative height within the cloud. For equivalent radar reflectivities (Ze) below about -28 dB, the minimum detectable with forthcoming spaceborne cloud radar, [IWC/σ] is a nearly constant value. IWC increases almost linearly with σ, with a temperature-dependence noted.

AB - Interrelationships between volume extinction coefficient (σ), ice water content (IWC), and effective radius (re), each dependent upon the particle size distribution (PSD) and temperature (T), are developed using in-situ microphysical measurements at low and midlatitudes, remote sensing data, and model results. The ratio [IWC /σ], proportional to re, increases with T. Lower values of [IWC/σ] are observed near cloud top and base than within a cloud layer, although [IWC/σ] changes more with temperature than relative height within the cloud. For equivalent radar reflectivities (Ze) below about -28 dB, the minimum detectable with forthcoming spaceborne cloud radar, [IWC/σ] is a nearly constant value. IWC increases almost linearly with σ, with a temperature-dependence noted.

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Extinction-ice water content-effective radius algorithms for CALIPSO

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