Afterwards, the Northern Hemisphere glaciation added an ice volume forcing on the ASM, which additionally oscillated with glacial–interglacial cycles and there is no clear mechanism for aridification around this time.Here we use climate model simulations to identify the Tortonian stage (~7–11 Myr ago) of the Late Miocene epoch as the pivotal period for triggering north African aridity and creating the Sahara desert.We present an analysis of a present-day climate simulation (1990–2009) for the Southern Africa region with the Reg CM4 regional climate model (RCM, dx = 25 km ~0.22°) driven by the Community Atmospheric Model version 4 (CAM4) global climate model (GCM, dx = 1°).
Read more Good day lady, Looking for a lady that I can play with or ladies who wanna enjoy themselves and may join in if they want.With hundreds of members chatting daily with dozens of voyeurism live video streams, the chat room is a great place to meet, flirt, show off or simply watch.Read more am looking for a place to stay from mid dec in anywhere in sa, pref by the beach or forest- am a wonderful housepet - i clean up after yu am v sympathetic and affectionate, offer massages on demand, cooking and lap-dancing.i am also automatically a free domestic and houseslave to any wives ...Through a set of experiments with the Norwegian Earth System Model, we demonstrate that the African summer monsoon was drastically weakened by the Tethys Sea shrinkage during the Tortonian, allowing arid, desert conditions to expand across north Africa.
Not only did the Tethys shrinkage alter the mean climate of the region, it also enhanced the sensitivity of the African monsoon to orbital forcing, which subsequently became the major driver of Sahara extent fluctuations.The analysis focuses on seasonal climatologies, annual cycles, interannual variability, and extreme events.In addition to evaluating the performance of the models, we also attempt to assess the added value of the regional model compared to the driving one.CO;2&id=pmid:&genre=article&aulast=Chou&aufirst=C.&title=J. Clim.&volume=16&spage=406&epage=425&date=2003&atitle=Mechanisms limiting the northward extent of the northern summer convection zones&sid=nature: Nature"2.0. Rev.&rft.volume=124&rft.spage=2046&rft.epage=2070&rft.date=1996&rft.atitle=Multidimensional flux form semi-lagrangian transport schemes&rfr_id=info:sid/nature.com: Nature.com&id=doi:10.1175/1520-0493(1996)1242.0. Rev.&volume=124&spage=2046&epage=2070&date=1996&atitle=Multidimensional flux form semi-lagrangian transport schemes&sid=nature: Nature" history&rfr_id=info:sid/nature.com: Nature.com&id=doi:10.1038/ngeo1186&id=pmid:&genre=article&aulast=Beerling&aufirst=D.CO;2&rft_id=info:pmid/&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.aulast=Lin&rft.aufirst=S.-J.&rft.jtitle=Mon. CO;2&id=pmid:&genre=article&aulast=Lin&aufirst=S.-J.&title=Mon. The results from Plio MIP show that the ASM intensified and summer precipitation increased in North Africa during the mid-Piacenzian, which can be explained by the increased net energy in the atmospheric column above North Africa.