A numerical study of the air-mass transformation over the Japan Sea in winter
A numerical study of the air-mass transformation over the Japan Sea in winter
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冬季日本海气团转化的数值研究
DOI：
10.2151/jmsj1965.43.1_1
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发表时间：
1965
影响因子：
3.1
通讯作者：
T. Asai
中科院分区：
文献类型：
--
作者：
T. Asai
造成日本群岛冬季降雪的最重要原因之一，与日本海上空大陆极地气团的转换有关。由于感热和潜热的增加，CP气团在相对温暖的水中被迅速改变。通过考虑水蒸气的相变和随静态稳定性变化的交换系数，对涡旋扩散引起的空气质量转化理论进行了重新检验。通过数值实验对模型进行了验证。结果表明，如果考虑模式中交换系数的变化，本模式能较好地描述冬季日本海的平均天气状况。
One of the most important causes for snowfall over the Japanese Islands in winter is associated with the transformation of continental polar air-masses during passage over the Japan Sea. The cP air-masses are rapidly modified over the relatively warm water owing to the addition of sensible and latent heat. The theory of air-mass transformation due to eddy diffusions is re-examined by taking account of the phase change of water vapor and the variable exchange coefficient dependent on the static stability. Numerical experiments are made to test the model. It is shown that the present simple model can describe the average weather condition over the Japan Sea in winter, if the variation of exchange coefficients in the model is taken into consideration.