Studies on the Meteorological Elements of High Cloud

[摘要] Since the accurate height of high cloud is measured by balloon tracking, we can know the meteorological elements there from radiosonde data.High cloud exists in the transitional layer between two air flows. This transitional layer has the temperature lapse rate of about 0.2_??_0.4°C/100m.From the fact that the balloon disappears at the top, inside, and base of the layer, the thickness of the layer seems to denote the thickness of high cloud but it follows, the thickness of the layer is not in so good proportion to the thickness by sight, and we must consider not only the thickness but also the density of the cloud particles.We have no reliable data of, humidity at higher level. Hair hygrometer doesn't work enough there, and in this paper the value is decided from temperature and humidity.Temperature range of high cloud extends -10_??_-50°C. This has a certain connection with the experiments on the growth of ice crystals.By analysis of transitonal, layer on time-isopleth, we can analyse the states of high cloud, and make it use for weather forecast. Here we show two cases, that is, developing and dissipating of high cloud. Relation between temperature lapse rate and state of the sky (CH) is given as one of the general results.

[学科分类] 大气科学