Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.3390/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
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ISSN | 2072-4292 |
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 |
推荐引用方式 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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