工矿城市地面热场的遥感调查及其对大气污染的影响

Remote Sensing Investigation on the Ground Thermal Field and its Influence on Air Pollution in an Industrial and Mining City

以山西省晋城市为例，采用航空热红外扫描方法获取冬季清晨（５：３０—６：３０）和中午（１３：３０—１４：３０）２个时相的图象信息，以地面同步辐射温度数据作为温度定标，进行图象的量化、几何纠正、热场分类等数字图象处理，求取该市的地面热场强度，从而得出清晨整个城市的热岛效应十分明显．而中午热岛现象不明显，地面辐射温度差２个时相均为１０℃左右。根据低空气温和下垫面辐射温度，建立了２者之间的线性关系，并由此研究了地面热场对大气污染的不良影响。

In Jincheng City, Shanxi Prmince, the two temporal thermal infrared images were taken by means of airborne thermal infrared scanner in early morning (from 5: 30 to 6: 30) and midday (from 13: 30 to 14: 30) in winter. With reference to simultaneous ground radiation temperature data, some of digital image processing methods, such as image quantization, geometric correction, and thermal field classification, were qsed for discovering the ground thermal field intensity in the city. Based on these, it was concluded that there is a very obvious ground thermal island effect in early morning and a vague one in midday, and the ground radiation temperature differences for both of the two tempral phases are about 10oC. In addition, the linear relationship between the lOw altitude air temperature and the ground radiation temperature were computed, and a bad innuence of the ground thermal fued on air pollution was found.