Arid
DOI10.1016/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
ISSN0034-4257
EISSN1879-0704
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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