The Response of African Land Surface Phenology to Large Scale Climate Oscillations
Variations in agricultural production due to rainfall and temperature fluctuations are a primary cause of food insecurity on the African continent. Analysis of changes in phenology can provide quantitative information on the effect of climate variability on growing seasons in agricultural regions. U...
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ftnasantrs:oai:casi.ntrs.nasa.gov:20110015412 2023-05-15T17:35:16+02:00 The Response of African Land Surface Phenology to Large Scale Climate Oscillations Brown, Molly E. de Beurs, Kirsten Vrieling, Anton Unclassified, Unlimited, Publicly available October 15, 2010 application/pdf http://hdl.handle.net/2060/20110015412 unknown Document ID: 20110015412 http://hdl.handle.net/2060/20110015412 Copyright, Distribution as joint owner in the copyright CASI Earth Resources and Remote Sensing GSFC.JA.4701.2011 Remote Sensing of Environment (ISSN 0034-4257); 114; 10; 2286-2296 2010 ftnasantrs 2019-07-21T00:59:49Z Variations in agricultural production due to rainfall and temperature fluctuations are a primary cause of food insecurity on the African continent. Analysis of changes in phenology can provide quantitative information on the effect of climate variability on growing seasons in agricultural regions. Using a robust statistical methodology, we describe the relationship between phenology metrics derived from the 26 year AVHRR NDVI record and the North Atlantic Oscillation index (NAO), the Indian Ocean Dipole (IOD), the Pacific Decadal Oscillation (PDO), and the Multivariate ENSO Index (MEI). We map the most significant positive and negative correlation for the four climate indices in Eastern, Western and Southern Africa between two phenological metrics and the climate indices. Our objective is to provide evidence of whether climate variability captured in the four indices has had a significant impact on the vegetative productivity of Africa during the past quarter century. We found that the start of season and cumulative NDVI were significantly affected by large scale variations in climate. The particular climate index and the timing showing highest correlation depended heavily on the region examined. In Western Africa the cumulative NDVI correlates with PDO in September-November. In Eastern Africa the start of the June-October season strongly correlates with PDO in March-May, while the PDO in December-February correlates with the start of the February-June season. The cumulative NDVI over this last season relates to the MEI of March-May. For Southern Africa, high correlations exist between SOS and NAO of September-November, and cumulative NDVI and MEI of March-May. The research shows that climate indices can be used to anticipate late start and variable vigor in the growing season of sensitive agricultural regions in Africa. Other/Unknown Material North Atlantic North Atlantic oscillation NASA Technical Reports Server (NTRS) Indian Pacific |
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NASA Technical Reports Server (NTRS) |
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ftnasantrs |
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topic |
Earth Resources and Remote Sensing |
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Earth Resources and Remote Sensing Brown, Molly E. de Beurs, Kirsten Vrieling, Anton The Response of African Land Surface Phenology to Large Scale Climate Oscillations |
topic_facet |
Earth Resources and Remote Sensing |
description |
Variations in agricultural production due to rainfall and temperature fluctuations are a primary cause of food insecurity on the African continent. Analysis of changes in phenology can provide quantitative information on the effect of climate variability on growing seasons in agricultural regions. Using a robust statistical methodology, we describe the relationship between phenology metrics derived from the 26 year AVHRR NDVI record and the North Atlantic Oscillation index (NAO), the Indian Ocean Dipole (IOD), the Pacific Decadal Oscillation (PDO), and the Multivariate ENSO Index (MEI). We map the most significant positive and negative correlation for the four climate indices in Eastern, Western and Southern Africa between two phenological metrics and the climate indices. Our objective is to provide evidence of whether climate variability captured in the four indices has had a significant impact on the vegetative productivity of Africa during the past quarter century. We found that the start of season and cumulative NDVI were significantly affected by large scale variations in climate. The particular climate index and the timing showing highest correlation depended heavily on the region examined. In Western Africa the cumulative NDVI correlates with PDO in September-November. In Eastern Africa the start of the June-October season strongly correlates with PDO in March-May, while the PDO in December-February correlates with the start of the February-June season. The cumulative NDVI over this last season relates to the MEI of March-May. For Southern Africa, high correlations exist between SOS and NAO of September-November, and cumulative NDVI and MEI of March-May. The research shows that climate indices can be used to anticipate late start and variable vigor in the growing season of sensitive agricultural regions in Africa. |
format |
Other/Unknown Material |
author |
Brown, Molly E. de Beurs, Kirsten Vrieling, Anton |
author_facet |
Brown, Molly E. de Beurs, Kirsten Vrieling, Anton |
author_sort |
Brown, Molly E. |
title |
The Response of African Land Surface Phenology to Large Scale Climate Oscillations |
title_short |
The Response of African Land Surface Phenology to Large Scale Climate Oscillations |
title_full |
The Response of African Land Surface Phenology to Large Scale Climate Oscillations |
title_fullStr |
The Response of African Land Surface Phenology to Large Scale Climate Oscillations |
title_full_unstemmed |
The Response of African Land Surface Phenology to Large Scale Climate Oscillations |
title_sort |
response of african land surface phenology to large scale climate oscillations |
publishDate |
2010 |
url |
http://hdl.handle.net/2060/20110015412 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Indian Pacific |
geographic_facet |
Indian Pacific |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
CASI |
op_relation |
Document ID: 20110015412 http://hdl.handle.net/2060/20110015412 |
op_rights |
Copyright, Distribution as joint owner in the copyright |
_version_ |
1766134379419009024 |