Arid
DOI10.3390/rs5062898
Relation between Seasonally Detrended Shortwave Infrared Reflectance Data and Land Surface Moisture in Semi-Arid Sahel
Olsen, Jorgen L.1; Ceccato, Pietro2; Proud, Simon R.1; Fensholt, Rasmus1; Grippa, Manuela3; Mougin, Eric3; Ardo, Jonas4; Sandholt, Inge1
通讯作者Olsen, Jorgen L.
来源期刊REMOTE SENSING
ISSN2072-4292
出版年2013
卷号5期号:6页码:2898-2927
英文摘要

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.


英文关键词soil moisture vegetation water stress Earth observation MSG SEVIRI SIWSI NDVI Sahel drought
类型Article
语种英语
国家Denmark ; USA ; France ; Sweden
收录类别SCI-E
WOS记录号WOS:000320771100016
WOS关键词VEGETATION WATER-CONTENT ; REMOTE-SENSING DATA ; TRIANGLE METHOD ; SPECTRAL INDEX ; SATELLITE DATA ; SOIL ; TEMPERATURE ; MODIS ; NDVI ; INFORMATION
WOS类目Remote Sensing
WOS研究方向Remote Sensing
来源机构French National Research Institute for Sustainable Development
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/179714
作者单位1.Univ Copenhagen, Dept Geosci & Nat Resource Management, DK-1350 Copenhagen K, Denmark;
2.Columbia Univ, Int Res Inst, Palisades, NY 10964 USA;
3.UPS, CNRS, CNES, Ctr Etud Spatiales BIOsphere CESBIO,UMR 5126,IRD, F-31401 Toulouse 9, France;
4.Lund Univ, Dept Phys Geog & Ecosyst Sci, SE-22362 Lund, Sweden
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GB/T 7714
Olsen, Jorgen L.,Ceccato, Pietro,Proud, Simon R.,et al. Relation between Seasonally Detrended Shortwave Infrared Reflectance Data and Land Surface Moisture in Semi-Arid Sahel[J]. French National Research Institute for Sustainable Development,2013,5(6):2898-2927.
APA Olsen, Jorgen L..,Ceccato, Pietro.,Proud, Simon R..,Fensholt, Rasmus.,Grippa, Manuela.,...&Sandholt, Inge.(2013).Relation between Seasonally Detrended Shortwave Infrared Reflectance Data and Land Surface Moisture in Semi-Arid Sahel.REMOTE SENSING,5(6),2898-2927.
MLA Olsen, Jorgen L.,et al."Relation between Seasonally Detrended Shortwave Infrared Reflectance Data and Land Surface Moisture in Semi-Arid Sahel".REMOTE SENSING 5.6(2013):2898-2927.
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