From an atmospheric pollution perspective, the boundary layer height (BLH) is the main driver of the aerosol concentrations close to the ground.
This has several problems: Failing to account for other factors, including boundary layer height, atmospheric pressure, and surface characteristics, can bias PM2.5 prediction.
Wind tunnel pressure time histories, in a simulated atmospheric boundary layer, were used to establish the roof height, gust wind speed at failure.
The PMRS method is designed to employ currently available satellite remote sensing parameters as many as possible, including aerosol optical depth (AOD), fine mode fraction (FMF), planetary boundary layer height (PBLH) and atmospheric relative humidity (RH), and thus be capable of deriving PM2.5 from instantaneous remote sensing measurements under different pollution levels.
In the present study, the spatial correlation coefficients of wind speeds at different heights in the atmospheric boundary layer under near-neutral conditions are calculated based on field measurements taken by Doppler SODARs.
The size distribution of HOA shows a distinct ultrafine mode that is commonly observed for primary particles from fresh combustion emissions [ 12, 76, 97] most prominently during morning rush hours and at night when boundary layer height is low and atmospheric dilution of the primary emissions is weak.
The low level of dilution in surface ozone in eclipse period may be attributed with change in local atmospheric boundary layer dynamic conditions or limited air pollutants dispersion, in term of decreases in planetary boundary layer height, wind speed and hence ventilation coefficient in the same eclipse hours.
Recently, the characteristics of thousand-meter height wind field in the atmospheric boundary layer (ABL) are investigated based on the field measurement by a wind profiler, which was installed in a coastal area of China (121.75°E, 39.05°N).
By comparison with the Deaves and Harris model it is shown that such a pressure driven boundary layer is a reasonable model for the lower half of the atmospheric boundary layer where the shear stress decreases approximately linearly with height.
As pointed out by Kumar, the relationship between ground-level PM2.5 and AOD is complex, with dependence on the scattering properties of the local aerosol (a function of aerosol type and atmospheric conditions) and their vertical distribution (a function of boundary layer height, transport, production, and loss).
