| 广西南宁冬季层状暖云微物理特征的飞机观测分析 |
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| 引用本文： | 马新成,程鹏,毕凯,王冀,韦增岸,黄梦宇,金华,张磊.广西南宁冬季层状暖云微物理特征的飞机观测分析[J].热带气象学报,2017,33(6):922-932. |
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| 作者姓名： | 马新成 程鹏 毕凯 王冀 韦增岸 黄梦宇 金华 张磊 |
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| 作者单位： | 1.北京市人工影响天气办公室，北京 100089 |
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| 基金项目： | 国家自然科学基金项目41675138北京市气象局科技项目BMBKJ201506001北京市优秀人才培养项目20081D0200800058 |
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| 摘 要： | 利用运十二飞机在2012年冬季广西南宁地区开展的12架次层状暖云微物理探测资料进行分析，统计和观测结果表明，层状暖云垂直方向分层显著。存在逆温是典型宏观特征，降水云基本都为多层逆温，逆温位置主要出现在云顶附近。云滴平均浓度为652±607个/cm3；无降水云比降水云云滴平均浓度略大，分别为678±348个/cm3和615±363个/cm3。平均液水含量为1.03±0.73 g/m3，其中降水云远大于无降水云，分别为1.3±0.9 g/m3和0.88±0.6 g/m3。平均有效直径为18.2±5.6 μm，降水云略大于无降水云，分别为19.4±5.0 μm和17.3±6.0 μm。垂直分布上，云滴数浓度在接近地面的下层云中最大，峰值区主要出现在云底，且随高度一般呈现递减趋势。云滴谱分布显示在6.5 μm出现次峰值。降水云中大云滴主要出现在接近地面的下层云中，而无降水云中几乎没有观测到大云滴。
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| 关 键 词： | 云微物理特征 飞机探测 层状暖云 冬季 广西 |
| 收稿时间： | 2016-10-09 |
AIRBORNE MEASUREMENTS OF MICROPHYSICAL CHARACTERISTICS OF WARM STRATUS CLOUDS IN WINTER NANNING,GUANGXI |
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| Institution: | 1.Beijing Weather Modification Office, Beijing 100089, China2.Bejing Key Laboratory of Cloud, Precipitations, and Water Resources, Beijing Meteorological Bureau/Institute of Urban Meteorology, CMA, Beijing 100089, China3.Weather Modification Office of the Guangxi Zhuang Autonomous Region, Nanning 530022, China4.Beijing Emergent Incident Warning Issue Center, Beijing 100089, China |
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| Abstract: | Microphysical characteristics of warm layer clouds in winter Nanning, Guangxi are statistically analyzed based on 12 flights of airborne instruments with a Y-12 aircraft. The results show that the clouds vary obviously by layers vertically. As a typical macrophysical characteristic of the layer clouds, the temperature inversion appears in precipitation clouds, with several layers of temperature inversion. Temperature inversion often appears near the cloud top. Secondly, for the 12 flight cases, the mean number concentration of cloud droplets is 652±607 cm-3. The concentration in non-precipitation clouds is larger than in precipitation clouds, with the values being 678±348 cm-3 and 615±363 cm-3 respectively. The average liquid water content (LWC) is 1.03±0.73 g/m3. LWC in precipitation clouds is 1.3±0.9 g/m3, which is apparently larger than in non-precipitation clouds (0.88±0.6 g/m3). The mean effective diameter (ED) is 18.2±5.6 μm. In precipitation clouds, the ED is 19.4±5.0 μm, while it is 17.3±6.0 μm in non-precipitation clouds. Furthermore, the peak value of cloud number concentration is at cloud base in lower clouds. It decreases with the height. Most of the droplets are less than 50 μm. The second peak value of the PSD is about 6.5 μm. From the cloud droplet images in precipitation clouds, it is known that large droplets are at lower layer clouds with great number. But in non-precipitation clouds, unusually big cloud droplets could be found. |
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