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Villamayor Moreno, Julián and Mohino Harris, Elsa and Juliette, Mignot and Serge, Janicot (2018) Atlantic control of the late nineteenth-century Sahel humid period. Journal of climate, 31 (20). pp. 8225-8240. ISSN 0894-8755
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Official URL: http://dx.doi.org/10.1175/JCLI-D-18-0148.1
Abstract
Precipitation regime shifts in the Sahel region have dramatic humanitarian and economic consequences such as the severe droughts during the 1970s and 1980s. Though Sahel precipitation changes during the late twentieth century have been extensively studied, little is known about the decadal variability prior to the twentieth century. Some evidence suggests that during the second half of the nineteenth century, the Sahel was as rainy as or even more rainy than during the 1950s and 1960s. Here, we reproduce such an anomalous Sahel humid period in the late nineteenth century by means of climate simulations. We show that this increase of rainfall was associated with an anomalous supply of humidity and higher-than-normal deep convection in the mid- and high troposphere. We present evidence suggesting that sea surface temperatures (SSTs) in the Atlantic basin played the dominant role in driving decadal Sahel rainfall variability during this early period.
Item Type: | Article |
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Additional Information: | ©2018 American Meteorological Society. |
Uncontrolled Keywords: | Sea-surface temperature; West-African monsoon; Rainfall variability; North-Atlantic; Decadal prediction; 20th-Century; Simulations; Dynamics; Model; Climate; Precipitation; Sea surface temperature; Atmosphere-ocean interaction; Climate models; Decadal variability; Multidecadal variability |
Subjects: | Sciences > Physics > Geophysics Sciences > Physics > Meteorology |
ID Code: | 49725 |
Deposited On: | 29 Oct 2018 18:47 |
Last Modified: | 15 Apr 2019 23:01 |
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