Use of airs and modis thermal infrared channels to retrieve ice cloud properties
dc.contributor.advisor | Yang, Ping | |
dc.creator | Yost, Christopher Rogers | |
dc.date.accessioned | 2007-04-25T20:04:23Z | |
dc.date.available | 2007-04-25T20:04:23Z | |
dc.date.created | 2006-12 | |
dc.date.issued | 2007-04-25 | |
dc.identifier.uri | https://hdl.handle.net/1969.1/4718 | |
dc.description.abstract | In this study, we use thermal infrared channels to retrieve the optical thickness and effective particle radius of ice clouds. A physical model is used in conjunction with Atmospheric Infrared Sounder (AIRS) temperature and water vapor profiles to simulate the top-of-atmosphere (TOA) brightness temperatures (BTs) observed by the Moderate Resolution Imaging Spectroradiometer (MODIS) for channels located at 8.5, 11.0, and 12.0 õm (1176, 909, and 833 cm-1). The model is initially validated by comparing simulated clear-sky BTs to MODIS-observed clear-sky BTs. We also investigate the effect of introducing a +3 K bias in the temperature profile, a +3 K bias in the surface temperature, and a +20% bias in the water vapor profile in order to test the sensitivity of the model to these inputs. For clear-sky cases, the simulated TOA BTs agree with MODIS to within 2-3 K. The model is then extended to simulate thermal infrared BTs for cloudy skies, and we infer the optical thickness and effective radius of ice clouds by matching MODIS-observed BTs to calculations. The optical thickness retrieval is reasonably consistent with the MODIS Collection 5 operational retrieval for optically thin clouds but tends to retrieve smaller particle sizes than MODIS. | en |
dc.format.extent | 2143629 bytes | en |
dc.format.medium | electronic | en |
dc.format.mimetype | application/pdf | |
dc.language.iso | en_US | |
dc.publisher | Texas A&M University | |
dc.subject | reomte sensing | en |
dc.subject | cloud | en |
dc.subject | climate | en |
dc.subject | MODIS | en |
dc.subject | AIRS | en |
dc.title | Use of airs and modis thermal infrared channels to retrieve ice cloud properties | en |
dc.type | Book | en |
dc.type | Thesis | en |
thesis.degree.department | Atmospheric Sciences | en |
thesis.degree.discipline | Atmospheric Sciences | en |
thesis.degree.grantor | Texas A&M University | en |
thesis.degree.name | Master of Science | en |
thesis.degree.level | Masters | en |
dc.contributor.committeeMember | Kattawar, George | |
dc.contributor.committeeMember | North, Gerald | |
dc.contributor.committeeMember | Wilheit, Thomas | |
dc.type.genre | Electronic Thesis | en |
dc.type.material | text | en |
dc.format.digitalOrigin | born digital | en |
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