A Modeling Study of Boundary Layer Wind Flow over Tehran Region during a High Pollution Episode

• DOI: 10.36884/jafm.7.02.19569
• Publication Date: 2020-04-05T14:54:58Z
• Authors: Hossein Malakooti; A. A. Bidokhti

The influence of a mega-city on the atmospheric boundary layer wind field was examined in complex-terrain, semi-arid Tehran region using Pennsylvania State University/National Center for Atmospheric Research fifth-generation Mesoscale Model (MM5) during high pollution period.In addition, model sensitivity studies were conducted to evaluate performance urban canopy and soil "SM2-U (3D)" parameterization field.The topographic flows effects found play important roles modulating field, urbanized areas exerted local meteorology.An emission inventory heat generation developed updated 2005 this work.By detailed methodology, we calculated spatial temporal distributions anthropogenic flux (Q f ) 2005.Wintertime Q is larger than summertime , which reflects importance heating emissions from buildings traffic cold warm periods respectively.Different parameterizations used as tool investigate modifications induced by presence an area interest.It that, meteorological simulations, drag-force approach (DA) coupled with (SM2-U) preferable roughness (RA) slab model.The comparisons indicated that most features are well reproduced DA-SM2-U configuration being taken into account.This modeling option showed suburban part city dominated whereas center south more affected island (UHI) forcing especially night studied episodes.