Impact of large scale climate oscillation on drought in West Africa
Drought poses a significant threat to the delicate economies in subsaharan Africa. This study investigates the influence of large scale ocean oscillation on drought in West Africa. Standardized Precipitation Index for the region was computed using monthly precipitation data from the Climate Research...
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ftdatacite:10.48550/arxiv.1901.10145 2023-05-15T17:32:49+02:00 Impact of large scale climate oscillation on drought in West Africa Ogunjo, Samuel T. Fuwape, Ibiyinka A. Olusegun, Christiana F. 2019 https://dx.doi.org/10.48550/arxiv.1901.10145 https://arxiv.org/abs/1901.10145 unknown arXiv Creative Commons Attribution Share Alike 4.0 International https://creativecommons.org/licenses/by-sa/4.0/legalcode cc-by-sa-4.0 CC-BY-SA Atmospheric and Oceanic Physics physics.ao-ph FOS Physical sciences Preprint Article article CreativeWork 2019 ftdatacite https://doi.org/10.48550/arxiv.1901.10145 2022-04-01T08:50:40Z Drought poses a significant threat to the delicate economies in subsaharan Africa. This study investigates the influence of large scale ocean oscillation on drought in West Africa. Standardized Precipitation Index for the region was computed using monthly precipitation data from the Climate Research Unit during the period 1961 -1990. The impact of three ocean oscillation indices - Southern Ocean Index (SOI), Pacific Decadal Oscillation (PDO) and North Atlantic Oscillation (NAO) on drought over West Africa was investigated using linear correlation, co-integration test, mutual information and nonlinear synchronization methods. SOI showed predominantly positive correlation with drought over the region while PDO and NAO showed negative correlation. This was confirmed by the co-integration tests. The nonlinear test revealed more complex relationship between the indices and drought. PDO has lesser influence or contribute less to the drought in the coastal region compared to the Sahel region of West Africa. : 25 pages, 7 figures, no table Report North Atlantic North Atlantic oscillation Southern Ocean DataCite Metadata Store (German National Library of Science and Technology) Southern Ocean Pacific Soi ENVELOPE(30.704,30.704,66.481,66.481) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Atmospheric and Oceanic Physics physics.ao-ph FOS Physical sciences |
spellingShingle |
Atmospheric and Oceanic Physics physics.ao-ph FOS Physical sciences Ogunjo, Samuel T. Fuwape, Ibiyinka A. Olusegun, Christiana F. Impact of large scale climate oscillation on drought in West Africa |
topic_facet |
Atmospheric and Oceanic Physics physics.ao-ph FOS Physical sciences |
description |
Drought poses a significant threat to the delicate economies in subsaharan Africa. This study investigates the influence of large scale ocean oscillation on drought in West Africa. Standardized Precipitation Index for the region was computed using monthly precipitation data from the Climate Research Unit during the period 1961 -1990. The impact of three ocean oscillation indices - Southern Ocean Index (SOI), Pacific Decadal Oscillation (PDO) and North Atlantic Oscillation (NAO) on drought over West Africa was investigated using linear correlation, co-integration test, mutual information and nonlinear synchronization methods. SOI showed predominantly positive correlation with drought over the region while PDO and NAO showed negative correlation. This was confirmed by the co-integration tests. The nonlinear test revealed more complex relationship between the indices and drought. PDO has lesser influence or contribute less to the drought in the coastal region compared to the Sahel region of West Africa. : 25 pages, 7 figures, no table |
format |
Report |
author |
Ogunjo, Samuel T. Fuwape, Ibiyinka A. Olusegun, Christiana F. |
author_facet |
Ogunjo, Samuel T. Fuwape, Ibiyinka A. Olusegun, Christiana F. |
author_sort |
Ogunjo, Samuel T. |
title |
Impact of large scale climate oscillation on drought in West Africa |
title_short |
Impact of large scale climate oscillation on drought in West Africa |
title_full |
Impact of large scale climate oscillation on drought in West Africa |
title_fullStr |
Impact of large scale climate oscillation on drought in West Africa |
title_full_unstemmed |
Impact of large scale climate oscillation on drought in West Africa |
title_sort |
impact of large scale climate oscillation on drought in west africa |
publisher |
arXiv |
publishDate |
2019 |
url |
https://dx.doi.org/10.48550/arxiv.1901.10145 https://arxiv.org/abs/1901.10145 |
long_lat |
ENVELOPE(30.704,30.704,66.481,66.481) |
geographic |
Southern Ocean Pacific Soi |
geographic_facet |
Southern Ocean Pacific Soi |
genre |
North Atlantic North Atlantic oscillation Southern Ocean |
genre_facet |
North Atlantic North Atlantic oscillation Southern Ocean |
op_rights |
Creative Commons Attribution Share Alike 4.0 International https://creativecommons.org/licenses/by-sa/4.0/legalcode cc-by-sa-4.0 |
op_rightsnorm |
CC-BY-SA |
op_doi |
https://doi.org/10.48550/arxiv.1901.10145 |
_version_ |
1766131096802557952 |