Global warming induced hybrid rainy seasons in the Sahel
Open Access Journal The small rainfall recovery observed over the Sahel, concomitant with a regional climate warming, conceals some drought features that exacerbate food security. The new rainfall features include false start and early cessation of rainy seasons, increased frequency of intense daily...
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ftcgiar:oai:cgspace.cgiar.org:10568/77798 2023-10-09T21:54:02+02:00 Global warming induced hybrid rainy seasons in the Sahel Salack, S. Klein, C. Giannini, A. Sarr, B. Worou, O.N. Belko, N. Bliefernicht, J. Kunstman, H. 2016-11-21T11:48:59Z 1-11 application/pdf https://hdl.handle.net/10568/77798 https://doi.org/10.1088/1748-9326/11/10/104008 en eng IOP Publishing Salack, S., Klein, C., Giannini, A., Sarr, B., Worou, O.N., Belko, N., . & Kunstman, H. (2016). Global warming induced hybrid rainy seasons in the Sahel. Environmental Research Letters, 11(10), 104008. 1748-9326 https://hdl.handle.net/10568/77798 https://doi.org/10.1088/1748-9326/11/10/104008 CC-BY-3.0 Open Access Environmental Research Letters global warming farming systems food security agroclimatic Journal Article 2016 ftcgiar https://doi.org/10.1088/1748-9326/11/10/104008 2023-09-12T22:54:58Z Open Access Journal The small rainfall recovery observed over the Sahel, concomitant with a regional climate warming, conceals some drought features that exacerbate food security. The new rainfall features include false start and early cessation of rainy seasons, increased frequency of intense daily rainfall, increasing number of hot nights and warm days and a decreasing trend in diurnal temperature range. Here, we explain these mixed dry/wet seasonal rainfall features which are called hybrid rainy seasons by delving into observed data consensus on the reduction in rainfall amount, its spatial coverage, timing and erratic distribution of events, and other atmospheric variables crucial in agro-climatic monitoring and seasonal forecasting. Further composite investigations of seasonal droughts, oceans warming and the regional atmospheric circulation nexus reveal that the low-to-mid-level atmospheric winds pattern, often stationary relative to either strong or neutral El-Niño-Southern-Oscillations drought patterns, associates to basin warmings in the North Atlantic and the Mediterranean Sea to trigger hybrid rainy seasons in the Sahel. More challenging to rain-fed farming systems, our results suggest that these new rainfall conditions will most likely be sustained by global warming, reshaping thereby our understanding of food insecurity in this region. Article in Journal/Newspaper North Atlantic CGIAR CGSpace (Consultative Group on International Agricultural Research) Environmental Research Letters 11 10 104008 |
institution |
Open Polar |
collection |
CGIAR CGSpace (Consultative Group on International Agricultural Research) |
op_collection_id |
ftcgiar |
language |
English |
topic |
global warming farming systems food security agroclimatic |
spellingShingle |
global warming farming systems food security agroclimatic Salack, S. Klein, C. Giannini, A. Sarr, B. Worou, O.N. Belko, N. Bliefernicht, J. Kunstman, H. Global warming induced hybrid rainy seasons in the Sahel |
topic_facet |
global warming farming systems food security agroclimatic |
description |
Open Access Journal The small rainfall recovery observed over the Sahel, concomitant with a regional climate warming, conceals some drought features that exacerbate food security. The new rainfall features include false start and early cessation of rainy seasons, increased frequency of intense daily rainfall, increasing number of hot nights and warm days and a decreasing trend in diurnal temperature range. Here, we explain these mixed dry/wet seasonal rainfall features which are called hybrid rainy seasons by delving into observed data consensus on the reduction in rainfall amount, its spatial coverage, timing and erratic distribution of events, and other atmospheric variables crucial in agro-climatic monitoring and seasonal forecasting. Further composite investigations of seasonal droughts, oceans warming and the regional atmospheric circulation nexus reveal that the low-to-mid-level atmospheric winds pattern, often stationary relative to either strong or neutral El-Niño-Southern-Oscillations drought patterns, associates to basin warmings in the North Atlantic and the Mediterranean Sea to trigger hybrid rainy seasons in the Sahel. More challenging to rain-fed farming systems, our results suggest that these new rainfall conditions will most likely be sustained by global warming, reshaping thereby our understanding of food insecurity in this region. |
format |
Article in Journal/Newspaper |
author |
Salack, S. Klein, C. Giannini, A. Sarr, B. Worou, O.N. Belko, N. Bliefernicht, J. Kunstman, H. |
author_facet |
Salack, S. Klein, C. Giannini, A. Sarr, B. Worou, O.N. Belko, N. Bliefernicht, J. Kunstman, H. |
author_sort |
Salack, S. |
title |
Global warming induced hybrid rainy seasons in the Sahel |
title_short |
Global warming induced hybrid rainy seasons in the Sahel |
title_full |
Global warming induced hybrid rainy seasons in the Sahel |
title_fullStr |
Global warming induced hybrid rainy seasons in the Sahel |
title_full_unstemmed |
Global warming induced hybrid rainy seasons in the Sahel |
title_sort |
global warming induced hybrid rainy seasons in the sahel |
publisher |
IOP Publishing |
publishDate |
2016 |
url |
https://hdl.handle.net/10568/77798 https://doi.org/10.1088/1748-9326/11/10/104008 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Environmental Research Letters |
op_relation |
Salack, S., Klein, C., Giannini, A., Sarr, B., Worou, O.N., Belko, N., . & Kunstman, H. (2016). Global warming induced hybrid rainy seasons in the Sahel. Environmental Research Letters, 11(10), 104008. 1748-9326 https://hdl.handle.net/10568/77798 https://doi.org/10.1088/1748-9326/11/10/104008 |
op_rights |
CC-BY-3.0 Open Access |
op_doi |
https://doi.org/10.1088/1748-9326/11/10/104008 |
container_title |
Environmental Research Letters |
container_volume |
11 |
container_issue |
10 |
container_start_page |
104008 |
_version_ |
1779317451719180288 |