Evaluation of Atmospheric Visibility Sensitivity Test Results in Xi'an Based on WRF/CMAQ Model
During heavy pollution conditions in winter,visibility and relative humidity exhibit a negative correlation,and visibility also shows a pronounced seasonal variation trend,with significantly more low-visibility weather occurring in autumn and winter than in spring and summer.This article evaluates the effectiveness of sensitivity tests on the prediction method for atmospheric visibility in Xi'an based on the WRF/CMAQ model,through a comparative analysis of observed and simulated values.The analysis reveals that the WRF model's simulation of the peak and trough trends in relative humidity aligns well with observations,albeit with some overestimation of the relative humidity values.Within the CMAQ model,when calculating visibility values based on aerosol extinction coefficients,the devia-tion between simulated and observed values becomes substantial when visibility exceeds 10 kilometers,with simulated values far exceeding observations.However,the improved visibility parameterization scheme B exhibits reduced relative deviations,enabling a more accurate simulation of atmospheric visibility variations.
万方数据
维普
