Dynamics of the west african monsoon jump
WebWeak monsoon rains produced drought and famine over large parts of Africa in the 1970s and 1980s, but the West African monsoon rains have recovered somewhat since then. So there is evidence that monsoons are changing, but researchers are still investigating how the amount of monsoon rainfall will be affected by climate change in the future. WebJul 15, 2010 · Abstract This study is the last in a series of papers addressing the dynamics of the West African summer monsoon at intraseasonal time scales between 10 and 90 days. The signals of convectively coupled equatorial Rossby (ER) waves within the summer African monsoon have been investigated after filtering NOAA outgoing …
Dynamics of the west african monsoon jump
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WebAfrican Monsoon Region. African Monsoon Region is located between latitudes N10° and N20°, it is the major wind system which affected the West African Region. The temperature change weakened the African Monsoon system and Atlantic-European Hadley cell. In the African Monsoon Region, the Intertropical Convergence Zone (ITCZ) shifted southwards WebDr Klutse studies climate dynamics of West Africa. Her work focuses on climate science and development specifically on the African monsoon. [2] [3] She is a senior lecturer at the Department of Physics, University of Ghana. [4] In the past, she managed the Remote Sensing and Climate Centre. [5]
WebJun 8, 2006 · The monsoon jump occurs in the unique large-scale dynamics of the West African summer, and the RCM is able to capture that environment accurately. For … WebDec 1, 2006 · The climate of West Africa is to a large extent controlled by the WAM (Hall and Peyrillé, 2006; Fink et al., 2024). The monsoon is connected to the large north-south pressure gradient between ...
WebNov 2, 2024 · The West African Monsoon (WAM) involves the interaction of multi-scale processes ranging from planetary to cumulus scales, which makes it challenging for coarse resolution General Circulation Models to accurately simulate WAM. The present study evaluates the ability of the high-resolution ( $$\\sim$$ ∼ 25 km) Atmospheric General … WebNov 1, 2007 · The observed abrupt latitudinal shift of maximum precipitation from the Guinean coast into the Sahel region in June, known as the West African monsoon …
WebDec 1, 2010 · The WAWJ extends westward to 22°W and strengthens, with a zonal wind maximum of 4 m s −1 at 8°–10°N. Over land, the zonal wind at 14°–18°N is also stronger than in stage 1 as the monsoon flow expands northward to about 19°N over West Africa. The jet reaches peak intensity in stage 3 ( Fig. 2c ).
WebJun 29, 2015 · North Africa was wetter 15,000–5,000 years ago than today, with wetlands and lakes formed in the Sahara due to an enhanced monsoon. We reconstruct the lake … sharon wickhamWebThis study analyzes, at local and regional scales, the rainfall variability across the Agneby watershed at the Agboville outlet over the period 1950–2013. Daily rainfall data from 14 rain gauges are used. The methods used are based, firstly, on the rainfall index which aims to characterize the inter-annual and decadal variability of rainfall and, secondly, on the … sharon wichmanWeb2 days ago · NT: In West Africa—specifically the Sahelian region, where the countries of Niger, Burkina Faso, and Mali meet, the Tri-Border Region—there’s been a tremendous … sharon wi churchesWebThe African easterly jet is a region of the lower troposphere over West Africa where the seasonal mean wind speed is at a maximum and the wind is easterly. The temperature contrast between the Sahara Desert and the Gulf of Guinea causes the jet to form to the north of the monsoon trough.The jet's maximum wind speeds are at a height of 3 … sharon wienerWebDec 23, 2011 · The simulation of the onset of the West African monsoon (WAM), associated with the northward shift of the Intertropical Convergence Zone (ITCZ) occurring in May, June, and July, is a challenging task for atmospheric general circulation models (AGCMs), because of complex water and energy balance through the land-atmosphere … sharon wicklandWebWest African monsoon and its variability is used to study the effects of orbital and vegetation forcing on the dynamics of the monsoon. The purposes are to un-derstand … sharon wickWebWest African monsoon jump, regional climate model, absolute vorticity, boundary-layer entropy Abstract The observed seasonal migration of rainfall associated with the West African monsoon (WAM) is characterized by two regimes of relatively intense rainfall: an early, intense peak over the Guinean Coast during late May to early July; and a late ... sharon wickner