城市化对城市及周围附近气压变化影响分析

THE URBANIZATION INFLUENCES THE BAROMETRIC CHANGE OF THE CITY AND SURROUNDINGS

通过对订正到海平面高度的城市市中心与市郊两地气压的对比分析，发现虽然市中心与市郊两地海平面气压变化趋势一致，但两地气压数据存在显著差异，由于城市环境影响形成了城市及周围附近气压场的变化，市中心比市郊气压要低，经过比较发现，市中心与市郊海平面气压羞绝对值存在着“冬季大、春秋次之、夏季最小”的季节变化规律，以及“白天不明显、夜间显著”日变化规律的“城市气压洼地效应”，该效应是造成两地气压差异的除海拔高度不同之外的另一个重要原因．

By comparatively analyzing the barometric data of the city centre which is revised to the sea level and the suburb, we found that while the barometric around the sea level of the two places changes in the same trend, the two places＇ barometric data exist significant differences. As the changes of barometric field which closes to the city and nearby caused by urban environment impact, the barometric in city center is lower than the barometric in suburb. Passing by more detection, the variety regulations which draws from the absolute value of the difference between city center and suburb sea - level barometric and can be describe as ： for the season--＂ winter maximum, the spring and autumn time less and summer minimum＂ ;for one day--＂ not obvious in the daytime and obvious in the nighttime＂ forms ＂the city barometric marsh land effect＂, that effect is another important reason which resulted in the barometric difference in the two sides except the differences of the height above the sea level. At present, domestic and foreign workers in this area seldom carried out research about ＂The influences caused by the urbanization on the barometric changes of the city and surroundings＂. This experiment which has also studied the correlation between ＂the city barometric marsh land effect＂ and ＂the city heat island effect＂ is a beneficial attempt for the further research so that to reveal the law of ＂the influences of the urbanization on the urban climate＂.