This paper deals with the cause-of heat increase in the lower atmosphere in Hai-Cheng region prior to the earthpuake. By means of the temperature tendency equation, each item of heating factors has been Considered. The vertical velocity item's (convection item) value was -8.6℃/day, -3.8℃/day, on 3rd and Feb, respectively in the 1000rob to 970mb level, The radiation item's value was 3.9℃/day, 3.3℃/day on 3rd and 4th Feb. respectively, The horizotal transport item's value was 0.43/day, -0.8℃/day on 3rd and 4th. Feb. respectively. The latent heat item's value was Very small. The Sensible heat value (flux of sensible heat at atmosphere bottom), was calculated from the temperature tendency equation inversely; it seemed to be 7.4℃/day, 3.8℃/day on 3rd and 4th respectively. But the odeservations of the mean air temperture at 1.5m height in Hai-Cheng region showed that it appeared above the average ground temperature during the half period of lst-4th. Feb. It hinted that during the half period the sensible heat was transported from atmosphere to t-he ground. The net sensible heat transport was near zeros. The result shows that the heating mode of the lower atmosphere prior to the earthquake is Very different from traditional heating (conduct, eddy transport) It may be concerned with the pollution of gases which overflowed out of ground prior to the earthquake.
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韩元杰.海城地区震前低层大气增温的数值分析[J].地震工程学报,1981,3(3):48-60. Han Yuanjie. NUMERICAL ANALYSIS OF HEAT INCREASE IN THE LOWER ATMOSPHERE PRIOR TO THE HAI-CHENG EARTHQUAKE (1975)[J]. China Earthquake Engineering Journal,1981,3(3):48-60.