Dust aerosol radiative effect and influence on urban atmospheric boundary layer L. Zhang1,2, M. Chen1,2, and L. Li3 1College of Atmospheric Sciences, Lanzhou University, Lanzhou, 730000, China 2Key Laboratory of Western China's Environmental Systems (Ministry of Education), Lanzhou University, Lanzhou, 730000, China 3Beijing Regional Climate Center, Beijing Meteorological Bureau, Beijing, 100089, China
Abstract. An 1.5-level-closure and 3-D non-stationary atmospheric boundary layer (ABL)
model and a radiation transfer model with the output of Weather Research and
Forecast (WRF) Model and lidar AML-1 are employed to simulate the dust
aerosol radiative effect and its influence on ABL in Beijing for the period
of 23–26 January 2002 when a dust storm occurred. The simulation shows that
daytime dust aerosol radiative effect heats up the ABL at the mean rate of
about 0.68 K/h. The horizontal wind speed from ground to 900 m layer is also
overall increased, and the value changes about 0.01 m/s at 14:00 LT near the
ground. At night, the dust aerosol radiative effect cools the ABL at the
mean rate of −0.21 K/h and the wind speed lowers down at about −0.19 m/s at
02:00 LT near the ground.
Citation: Zhang, L., Chen, M., and Li, L.: Dust aerosol radiative effect and influence on urban atmospheric boundary layer, Atmos. Chem. Phys. Discuss., 7, 15565-15580, doi:10.5194/acpd-7-15565-2007, 2007.