NDLI: Soil Salinity Impacts on L-Band Remote Sensing of Soil Moisture

Content Provider	IEEE Xplore Digital Library
Author	McColl, K.A. Dongryeol Ryu Matic, V. Walker, J.P. Costelloe, J. Rudiger, C.
Copyright Year	2004
Abstract	The recently launched Soil Moisture and Ocean Salinity (SMOS) satellite is providing soil moisture observations at continental scales by measuring L-band microwave radiation emitted from the land surface. While its retrieval algorithms will correct for factors such as vegetation and surface roughness, it will not correct for soil salinity. This letter tests the assumption that soil salinity will have a negligible impact on L-band brightness temperature (Tb) at SMOS scales using field data; airborne Tb observations were collected in a saline groundwater discharge area near Nilpinna Station, South Australia. At the 500-m scale, the airborne observations of Tb could not be reproduced using the baseline algorithm of the SMOS Level 2 retrieval scheme, without accounting for soil salinity in the model. The analysis in this letter shows that soil moisture retrieval errors of at least 0.04 m³ m^-3 (i.e., the entire SMOS error budget) will occur due to salinity alone in SMOS footprints with saline coverage as low as 25% (possibly even much less). Consequently, fractional salinity coverage cannot be considered a negligible factor by microwave soil moisture satellite missions.
Sponsorship	IEEE Geoscience and Remote Sensing Society
Starting Page	262
Ending Page	266
Page Count	5
File Size	469237
File Format	PDF
ISSN	1545598X
Volume Number	9
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Soil moisture L-band Remote sensing Microwave radiometry Brightness temperature Land surface soil salinity soil moisture Soil Moisture and Ocean Salinity (SMOS)
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Geotechnical Engineering and Engineering Geology

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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The Soil Moisture and Ocean Salinity Mission - An Overview

On the Airborne Spatial Coverage Requirement for Microwave Satellite Validation

Faraday Rotation Retrieval Using SMOS Radiometric Data

Converting Between SMOS and SMAP Level-1 Brightness Temperature Observations Over Nonfrozen Land

Remote Sensing of Sea Surface Salinity From CAROLS L-Band Radiometer in the Gulf of Biscay

A combined modeling and multispectral/multiresolution remote sensing approach for disaggregation of surface soil moisture: application to SMOS configuration

SMOS Validation and the COSMOS Campaigns

ESA's Soil Moisture and Ocean Salinity Mission: Mission Performance and Operations

Surface Topography and Mixed-Pixel Effects on the Simulated L-Band Brightness Temperatures

Soil Salinity Impacts on L-Band Remote Sensing of Soil Moisture

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Converting Between SMOS and SMAP Level-1 Brightness Temperature Observations Over Nonfrozen Land

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