Global warming induced hybrid rainy seasons in the Sahel
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, increasin...
| Main Authors: | , , , , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
IOP Publishing
2016
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/77798 |
| _version_ | 1855523205306908672 |
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| author | Salack, S. Klein, C. Giannini, A. Sarr, B. Worou, Omonlola N. Belko, N. Bliefernicht, J. Kunstman, H. |
| author_browse | Belko, N. Bliefernicht, J. Giannini, A. Klein, C. Kunstman, H. Salack, S. Sarr, B. Worou, Omonlola N. |
| author_facet | Salack, S. Klein, C. Giannini, A. Sarr, B. Worou, Omonlola N. Belko, N. Bliefernicht, J. Kunstman, H. |
| author_sort | Salack, S. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | 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 | Journal Article |
| id | CGSpace77798 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | IOP Publishing |
| publisherStr | IOP Publishing |
| record_format | dspace |
| spelling | CGSpace777982025-11-11T10:14:20Z Global warming induced hybrid rainy seasons in the Sahel Salack, S. Klein, C. Giannini, A. Sarr, B. Worou, Omonlola N. Belko, N. Bliefernicht, J. Kunstman, H. global warming farming systems food security agroclimatic 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. 2016-10-01 2016-11-21T11:48:59Z 2016-11-21T11:48:59Z Journal Article https://hdl.handle.net/10568/77798 en Open Access application/pdf 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. |
| spellingShingle | global warming farming systems food security agroclimatic Salack, S. Klein, C. Giannini, A. Sarr, B. Worou, Omonlola N. Belko, N. Bliefernicht, J. Kunstman, H. Global warming induced hybrid rainy seasons in the Sahel |
| title | 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_short | Global warming induced hybrid rainy seasons in the Sahel |
| title_sort | global warming induced hybrid rainy seasons in the sahel |
| topic | global warming farming systems food security agroclimatic |
| url | https://hdl.handle.net/10568/77798 |
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