Climate and Desertification: A Revised Analysis

action Africa albedo America analysis annual areas arid atmosphere Australia balance belt carried cause central circulation climatic change climatology cloud countries cover depends desert desertification drought dry climates dryness dust dynamical earth effect evaporation evapotranspiration evidence experiments extensive Figure given global heat hemisphere hence human humid important increase Lake land latitude major margin mean MEETING Meteorological models modification monsoon natural North North Africa northern observations occur oceans Organization periods persistence physical Plan plants Pleistocene possible potential precipitation predicted present pressure processes produced Programme projects prolonged questions radiation rain rainfall ratio recent record regions Sahara Sahel Sahelian Sciences season seeding semi-arid shows significant similar soil solar South southern sub-tropical suggested suitable summer surface temperature tropical United University values variability variations vegetation weather wind World Climate zone