Organized roll circulation and transport of mineral aerosols in the atmospheric boundary layer

Abstract

Investigation of roll circulations and its transport characteristics in the atmospheric boundary layer (ABL) is carried out. The case study in Kalmykia, 28 of July, 2007, where the equipment measurements have been conducted by A.M. Obukhov Institute of Atmospheric Physics, is analyzed with the use of WRF-ARW model. The evolution of the circulation with considerable asymmetry in the positive and negative velocity and helicity components is registered. The rolls is sign out by the intensification of the dust picking up and accumulation from underlying terrain, and along with intensive vortices with vertical axis become the significant source of atmospheric pollutants. Captured fine aerosols can be transported by long distances and form the aerosol layers.