Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.rse.2011.07.011 |
Analysis of teleconnections between AVHRR-based sea surface temperature and vegetation productivity in the semi-arid Sahel | |
Huber, Silvia; Fensholt, Rasmus | |
通讯作者 | Huber, Silvia |
来源期刊 | REMOTE SENSING OF ENVIRONMENT
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ISSN | 0034-4257 |
EISSN | 1879-0704 |
出版年 | 2011 |
卷号 | 115期号:12页码:3276-3285 |
英文摘要 | Vegetation productivity across the Sahel is known to be affected by a variety of global sea surface temperature (SST) patterns. Often climate indices are used to relate Sahelian vegetation variability to large-scale ocean-atmosphere phenomena. However, previous research findings reporting on the Sahelian vegetation response to climate indices have been inconsistent and contradictory, which could partly be caused by the variations in spatial extent/definitions of climate indices and size of the region studied. The aim of this study was to analyze the linkage between climate indices, pixel-wise spatio-temporal patterns of global sea surface temperature and the Sahelian vegetation dynamics for 1982-2007. We stratified the Sahel into five subregions to account for the longitudinal variability in rainfall. We found significant correlations between climate indices and the Normalized Difference Vegetation Index (NDVI) in the Sahel, however with different magnitudes in terms of strength for the western, central and eastern Sahel. Also the correlations based on NDVI and global SST anomalies revealed the same East-West gradient, with a stronger association for the western than the eastern Sahel. Warmer than average SSTs throughout the Mediterranean basin seem to be associated with enhanced greenness over the central Sahel whereas colder than average SSTs in the Pacific and warmer than average SSTs in the eastern Atlantic were related to increased greenness in the most western Sahel. Accordingly, we achieved high correlations for SSTs of oceanic basins which are geographically associated to the climate indices yet by far not always these patterns were coherent. The detected SST-NDVI patterns could provide the basis to develop new means for improved forecasts in particular of the western Sahelian vegetation productivity. (C) 2011 Elsevier Inc. All rights reserved. |
英文关键词 | Climate indices NDVI Oceanic forcing Remote sensing Sahel SST Vegetation dynamics |
类型 | Article |
语种 | 英语 |
国家 | Denmark |
收录类别 | SCI-E |
WOS记录号 | WOS:000298311300026 |
WOS关键词 | AFRICAN ECOSYSTEMS ; EL-NINO ; RAINFALL ; NDVI ; ATLANTIC ; CLIMATE ; DYNAMICS ; VARIABILITY ; PACIFIC ; IMPACT |
WOS类目 | Environmental Sciences ; Remote Sensing ; Imaging Science & Photographic Technology |
WOS研究方向 | Environmental Sciences & Ecology ; Remote Sensing ; Imaging Science & Photographic Technology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/170323 |
作者单位 | Univ Copenhagen, Dept Geog & Geol, DK-1350 Copenhagen, Denmark |
推荐引用方式 GB/T 7714 | Huber, Silvia,Fensholt, Rasmus. Analysis of teleconnections between AVHRR-based sea surface temperature and vegetation productivity in the semi-arid Sahel[J],2011,115(12):3276-3285. |
APA | Huber, Silvia,&Fensholt, Rasmus.(2011).Analysis of teleconnections between AVHRR-based sea surface temperature and vegetation productivity in the semi-arid Sahel.REMOTE SENSING OF ENVIRONMENT,115(12),3276-3285. |
MLA | Huber, Silvia,et al."Analysis of teleconnections between AVHRR-based sea surface temperature and vegetation productivity in the semi-arid Sahel".REMOTE SENSING OF ENVIRONMENT 115.12(2011):3276-3285. |
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