Soil moisture retrieval over the Mackenzie River basin using AMSR-E 6.9 GHz brightness temperature

Naira Chaouch, Robert Leconte, Ramata Magagi, Marouane Temimi

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

2 Scopus citations

Abstract

An approach is proposed to estimate soil moisture and to monitor its change from AMSR-E 6.9 GHz passive microwave data acquired over a large northern basin. The lack of in situ direct measurements is a major issue to be resolved to reach the aim of this work. Therefore, "external" ancillary data were used as a surrogate for available measurements. The methodology is based on the inversion of a microwave radiative transfer model. A sequential method based on the sensitivity of the emitted microwave signal to soil roughness and vegetation parameters was applied to calibrate the model. The roughness parameter was determined from AMSR-E data acquired under dry watershed conditions. The vegetation parameters were estimated under wet conditions. The method was first applied in the Peace-Athabasca Delta area located in Northern Alberta, Canada. The estimated geophysical parameters were then used to retrieve soil moisture estimates for sites with similar LAI values. It was found that the variations of the estimated soil moisture compared well with soil moisture imported from NARR data. A satisfactory agreement was obtained between soil moisture, precipitation and temperature.

Original languageEnglish
Title of host publicationIAHS-AISH Publication - Remote Sensing for Environmental Monitoring and Change Detection
Pages64-69
Number of pages6
Edition316
StatePublished - 2007
EventIAHS Symposium on Remote Sensing for Environmental Monitoring and Change Detection - 24th General Assembly of the International Union of Geodesy and Geophysics (IUGG) - Perugia, Italy
Duration: 2 Jul 200713 Jul 2007

Publication series

NameIAHS-AISH Publication
Number316
ISSN (Print)0144-7815

Conference

ConferenceIAHS Symposium on Remote Sensing for Environmental Monitoring and Change Detection - 24th General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Country/TerritoryItaly
CityPerugia
Period2/07/0713/07/07

Keywords

  • AMSR-E brightness temperature
  • C-band emission
  • Soil moisture
  • Vegetation parameter

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