Global microwave land surface emissivity retrieval at the Amsr-E microwave frequencies

Hamidreza Norouzi, Marouane Temimi, Reza Khanbilvardi

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

Land emissivity is a key boundary condition particularly when used in Numerical Weather Prediction (NWP) models. The objective of this study is to develop a global land emissivity product using AMSR-E passive microwave data. This work investigates the impact of the difference in penetration depths between passive microwave and thermal temperatures on the retrieval of land emissivity. AMSR-E frequencies (6.9, 10.7, 18.7, and 36.5 GHz) have been used to retrieve land emissivity. Composite clear sky skin temperature (DX) produced by the International Satellite Cloud Climatology Project (ISCCP) was used. Moreover, information on water vapor and air temperature obtained from the ISCCP database (TOVS data) was used to calculate the upwelling and the downwelling atmospheric brightness temperatures as well as the atmospheric transmission. Instantaneous land emissivity maps have been developed at different AMSR-E frequencies. A monthly composited map was developed for each frequency. The analysis of the obtained maps has shown an acceptable agreement with the global pattern of land use/land cover. Also, a significant difference between ascending and descending overpasses emissivity was found in deserts and high topographyregions.

Original languageEnglish
Title of host publication11th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment, MicroRad 2010 - Proceedings
Pages90-95
Number of pages6
DOIs
StatePublished - 2010
Event11th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment, MicroRad 2010 - Washington, DC, United States
Duration: 1 Mar 20104 Mar 2010

Publication series

Name11th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment, MicroRad 2010 - Proceedings

Conference

Conference11th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment, MicroRad 2010
Country/TerritoryUnited States
CityWashington, DC
Period1/03/104/03/10

Keywords

  • Brightness temperature
  • Diurnal cycle
  • Land surface emissivity
  • Microwave

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