Abstract:The turbulent exchange characteristics of pollution and clean process over Guangzhou region were analyzed by combining pollutants data with land-air interaction data observed in the period from May 2004 to August 2005. The analysis focused on the relationship between the surface stability, wind, turbulent energy, and mass flux with the pollutants. The correlation coefficient between mean wind and mean turbulent energy reached up to 0.9; And the stronger the wind speed was, the larger the turbulent energy was. The correlation coefficients between pollutants and mean wind, mean turbulent energy were higher, followed by the correlation coefficient between pollutants and vapor flux; the above relationships were in obvious anti-correlations. The mean wind speed, turbulent energy and vapor flux in the polluting process were just 0.48,0.59,0.51 times as high as those with clean process, indicating that the reduction of unfavourable meteorological condition for the advection and diffusion of pollutants by half could result in the pollutants being accumulated by up to 3~6 times. The relationships among the pollutants are better in the pollution processes, especially the relativity between PM10 and NO2 is higher compared with that in the clean processes, in which the relationships among the pollutants were obvious weaker and the relativity between PM10 and NO2 was very low.
邓雪娇, 李菲, 吴兑, 谭浩波, 邓涛. 广州地区典型清洁与污染过程的大气湍流与物质交换特征[J]. 中国环境科学, 2011, 31(9): 1424-1430.
DENG Xue-Jiao, LI Fei, WU Dui, TAN Hao-Bo, DENG Tao. Turbulence and mass exchange characteristics of typical clean and pollution process over Guangzhou region. CHINA ENVIRONMENTAL SCIENCECE, 2011, 31(9): 1424-1430.