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Simulations of infrared radiances over a deep convective cloud system observed during tc4: potential for enhancing nocturnal ice cloud retrievals
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Selkirk, Henry B. Heymsfield, Gerald M. Tian, Lin King, Michael D. Korn, Errol McGill, Matthew Smith Jr., William L. Thompson, Anne M. Ayers, Kirk Yang, Ping Minnis, Patrick Hlavka, Dennis L. Hong, Gang Yost, Christopher R. Heymsfield, Andrew J. |
| Copyright Year | 2012 |
| Description | Retrievals of ice cloud properties using infrared measurements at 3.7, 6.7, 7.3, 8.5, 10.8, and 12.0 microns can provide consistent results regardless of solar illumination, but are limited to cloud optical thicknesses tau < approx.6. This paper investigates the variations in radiances at these wavelengths over a deep convective cloud system for their potential to extend retrievals of tau and ice particle size D(sub e) to optically thick clouds. Measurements from the Moderate Resolution Imaging Spectroradiometer Airborne Simulator--ASTER, the Scanning High-resolution Interferometer Sounder, the Cloud Physics Lidar (CPL), and the Cloud Radar System (CRS) aboard the NASA ER-2 aircraft during the NASA TC4 (Tropical Composition, Cloud and Climate Coupling) experiment flight during 5 August 2007, are used to examine the retrieval capabilities of infrared radiances over optically thick ice clouds. Simulations based on coincident in-situ measurements and combined cloud tau from CRS and CPL measurements are comparable to the observations. They reveal that brightness temperatures at these bands and their differences (BTD) are sensitive to tau up to approx.20 and that for ice clouds having tau > 20, the 3.7 - 10.8 microns and 3.7 - 6.7 microns BTDs are the most sensitive to D(sub e). Satellite imagery appears consistent with these results. Keywords: clouds; optical depth; particle size; satellite; TC4; multispectral thermal infrared |
| File Size | 3025822 |
| Page Count | 31 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20130008730 |
| Archival Resource Key | ark:/13960/t2c87919p |
| Language | English |
| Publisher Date | 2012-10-11 |
| Access Restriction | Open |
| Subject Keyword | Meteorology And Climatology Satellite Imagery In Situ Measurement Tropical Regions Climate Cloud Physics Data Retrieval Brightness Temperature Modis Radiometry Optical Thickness Optical Radar Convection Ice Clouds Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
