| 韩芳蓉,舒 斯,郭英莲,许建玉.基于地基微波辐射计对武汉夏季暴雨过程的观测分析[J].沙漠与绿洲气象,2017,11(6):83~88 |
| 基于地基微波辐射计对武汉夏季暴雨过程的观测分析 |
| Analysis of a heavy rain process in summer by the ground-based microwave radiometer in Wuhan |
| 投稿时间：2017-04-09 修订日期：2017-08-04 |
| DOI：10.12057/j.issn.1002-0799.2017.06.012 |
| 中文关键词: 微波辐射计资料,暴雨过程,对应特征 |
| 英文关键词:microwave radiometer data, heavy rain process, corresponding features |
| 基金项目:湖北省气象局面上项目(2016Y02) |
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| 中文摘要: |
| 利用地基微波辐射计获取的高时空分辨率资料，结合卫星云图资料，对2012年7月12-13日武汉站发生的暴雨过程中各气象要素与降水的关系进行了分析。结果表明：1）相对湿度、液态水含量、不稳定能量的数值、垂直高度等在降水期均明显大于非降水期，说明这些要素变化特征与降水有较好的对应关系，应用地基微波辐射计资料要素分析降水过程具有很高的可靠性。2）以小时雨量10mm将降水分界为弱降水和强降水时段，云底高度在强降水时段才为零；温度的垂直分布在降水时段存在逆温，且强降水比弱降水时段逆温层更高；水汽密度在有降水发生时，底层的大值区有所抬升，并在强降水时段对流层低层出现>26g/m3的大值中心。可以通过地基微波辐射计对降水做进一步的量级划分，有助于明确雨团性质和降水效率。 |
| 英文摘要: |
| By using the data measured by ground-based microwave radiometer with high spatial and temporal resolution and satellite infrared images, this paper analyzes the relationship about meteorological elements and precipitations in a heavy rain process in Wuhan on 12-13 July 2012. The results showed that: Firstly, the values of the relative humidity、the liquid water content and the unstable energy and the altitude of their maximum values in the precipitation period were all significantly greater than that in the precipitation period, which illustrated the corresponding relationship with these variation characteristics of elements and the precipitation, and it also showed a high reliability of the analysis of precipitation process by ground-based microwave radiometer. Secondly, the precipitation was divided into weak rain and heavy rain by an hourly rainfall of 10mm. The height of the cloud was zero only in the heavy rainfall period;The vertical distribution of temperature had an inversion during the period of precipitation, and the altitude of the inversion was higher in heavy rain period than that in the other. When the rain occurred, the bottom of the water vapor density raised with high value, and there was the large value center of > 26g/m3 in the lower troposphere during the heavy rainfall period.The precipitation could be further divided by the ground-based microwave radiometer data, which can help to clarify the feature of the rain group and the precipitation efficiency. |
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