Next Article in Journal
The Intercomparison of X-Band SAR Images from COSMO‑SkyMed and TerraSAR-X Satellites: Case Studies
Previous Article in Journal
Estimation of Offshore Wind Resources in Coastal Waters off Shirahama Using ENVISAT ASAR Images
 
 
Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
Journals
Remote Sensing
Volume 5
Issue 6
10.3390/rs5062898
remotesensing-logo
Submit to this Journal Review for this Journal Propose a Special Issue
► Article Menu

Article Menu

share Share announcement Help format_quote Cite question_answer Discuss in SciProfiles
first_page
settings
Order Article Reprints
Font Type:
Arial Georgia Verdana
Font Size:
Aa Aa Aa
Line Spacing:
Column Width:
Background:
Article

Relation between Seasonally Detrended Shortwave Infrared Reflectance Data and Land Surface Moisture in Semi‑Arid Sahel

by
Jørgen L. Olsen
1,*,
Pietro Ceccato
2,
Simon R. Proud
1,
Rasmus Fensholt
1,
Manuela Grippa
3,
Eric Mougin
3,
Jonas Ardö
4 and
Inge Sandholt
1
1
Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Voldgade 10, DK-1350 Copenhagen K, Denmark
2
The International Research Institute, Columbia University, 61 Route 9W, Palisades, NY 10964, USA
3
Centre d'Etudes Spatiales de la BIOsphere (CESBIO), UMR 5126 UPS-CNRS-CNES-IRD, 18 Avenue Edouard Belin, bpi 2801, F-31401 Toulouse Cedex 9, France
4
Department of Physical Geography and Ecosystems Science, Lund University, Sölvegatan 12, SE-22362 Lund, Sweden
*
Author to whom correspondence should be addressed.
Remote Sens. 2013, 5(6), 2898-2927; https://doi.org/10.3390/rs5062898
Submission received: 18 April 2013 / Revised: 23 May 2013 / Accepted: 23 May 2013 / Published: 6 June 2013
Browse Figures
Versions Notes

Abstract

In the Sudano-Sahelian areas of Africa droughts can have serious impacts on natural resources, and therefore land surface moisture is an important factor. Insufficient conventional sites for monitoring land surface moisture make the use of Earth Observation data for this purpose a key issue. In this study we explored the potential of using reflectance data in the Red, Near Infrared (NIR), and Shortwave Infrared (SWIR) spectral regions for detecting short term variations in land surface moisture in the Sahel, by analyzing data from three test sites and observations from the geostationary Meteosat Second Generation (MSG) satellite. We focused on responses in surface reflectance to soil- and surface moisture for bare soil and early to mid- growing season. A method for implementing detrended time series of the Shortwave Infrared Water Stress Index (SIWSI) is examined for detecting variations in vegetation moisture status, and is compared to detrended time series of the Normalized Difference Vegetation Index (NDVI). It was found that when plant available water is low, the SIWSI anomalies increase over time, while the NDVI anomalies decrease over time, but less systematically. Therefore SIWSI may carry important complementary information to NDVI in terms of vegetation water status, and can provide this information with the unique combination of temporal and spatial resolution from optical geostationary observations over Sahel. However, the relation between SIWSI anomalies and periods of water stress were not found to be sufficiently robust to be used for water stress detection.
Keywords: soil moisture; vegetation; water stress; Earth observation; MSG SEVIRI; SIWSI; NDVI; Sahel; drought soil moisture; vegetation; water stress; Earth observation; MSG SEVIRI; SIWSI; NDVI; Sahel; drought

Share and Cite

MDPI and ACS Style

Olsen, J.L.; Ceccato, P.; Proud, S.R.; Fensholt, R.; Grippa, M.; Mougin, E.; Ardö, J.; Sandholt, I. Relation between Seasonally Detrended Shortwave Infrared Reflectance Data and Land Surface Moisture in Semi‑Arid Sahel. Remote Sens. 2013, 5, 2898-2927. https://doi.org/10.3390/rs5062898

AMA Style

Olsen JL, Ceccato P, Proud SR, Fensholt R, Grippa M, Mougin E, Ardö J, Sandholt I. Relation between Seasonally Detrended Shortwave Infrared Reflectance Data and Land Surface Moisture in Semi‑Arid Sahel. Remote Sensing. 2013; 5(6):2898-2927. https://doi.org/10.3390/rs5062898

Chicago/Turabian Style

Olsen, Jørgen L., Pietro Ceccato, Simon R. Proud, Rasmus Fensholt, Manuela Grippa, Eric Mougin, Jonas Ardö, and Inge Sandholt. 2013. "Relation between Seasonally Detrended Shortwave Infrared Reflectance Data and Land Surface Moisture in Semi‑Arid Sahel" Remote Sensing 5, no. 6: 2898-2927. https://doi.org/10.3390/rs5062898

APA Style

Olsen, J. L., Ceccato, P., Proud, S. R., Fensholt, R., Grippa, M., Mougin, E., Ardö, J., & Sandholt, I. (2013). Relation between Seasonally Detrended Shortwave Infrared Reflectance Data and Land Surface Moisture in Semi‑Arid Sahel. Remote Sensing, 5(6), 2898-2927. https://doi.org/10.3390/rs5062898

Article Metrics

Back to TopTop