Relation between the Atmospheric Boundary Layer and Impact Factors under Severe Surface Thermal Conditions

Figure 1

(a) 700 hPa mean atmospheric circulation field during the last 40 years (solid line: geopotential height, unit: gpm; dash line: temperature, and unit: Celsius degree) and (b) mean vertical velocity and relative humidity during the last 40 years along 40°N (solid line: vertical velocity, unit: cm·s⁻¹; dash line: relative humidity, unit: %).

(a)

(b)