Impact of the Desert Dust on the Summer Monsoon System Over Southwestern North America
The radiative forcing of dust emitted from the Southwest United States (US) deserts and its impact on monsoon circulation and precipitation over the North America monsoon (NAM) region are simulated using a coupled meteorology and aerosol/chemistry model (WRF-Chem) for 15 years (1995-2009). During the monsoon season, dust has a cooling effect (-0.90 W m-2) at the surface, a warming effect (0.40 W m-2) in the atmosphere, and a negative top-of-the-atmosphere (TOA) forcing (-0.50 W m-2) over the deserts on 24-h average. Most of the dust emitted from the deserts concentrates below 800 hPa and accumulates ...
(For more, see "View full record.")