北京首都国际机场冻雨过程的模拟及其产生的可能机制

柳贵钧; 王飞; 沈晗; 冯向阳; 张伟

doi:10.3878/j.issn.1006-9585.2018.17051

北京首都国际机场冻雨过程的模拟及其产生的可能机制

doi: 10.3878/j.issn.1006-9585.2018.17051

中国民用航空华北地区空中交通管理局气象中心, 北京 100621

基金项目:

民航华北空管局科技立项项目 201405

详细信息

作者简介:
柳贵钧, 男, 1967年出生, 本科, 工程师, 主要从事航空气象预报。E-mail: guijun_liu@163.com

通讯作者:
王飞, E-mail: wangf43@163.com

中图分类号: P435
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- 被引次数: 0
出版历程
- 收稿日期: 2017-03-23
- 网络出版日期: 2017-06-22
- 刊出日期: 2018-03-20

Numerical Simulation of a Freezing-Rain Process in Beijing Capital International Airport and the Mechanism for Its Formation

Meteorological Center of Air Traffic Regulation of Civil Aviation in North China, Beijing 100621

Funds:

Science and Technology Project of Civil Aviation North China Air Traffic Administration 201405

摘要

摘要: 为了探讨北京首都国际机场冻雨过程产生的可能机制，利用NCEP再分析资料、风云2号E星（FY-2E）的云顶亮温（Black Body Temperature，TBB）逐小时资料及风云3号A星（FY-3A）反演的云顶高度日平均资料做为检验依据，使用美国非静力中尺度模式（Weather Research and Forecasting，WRF）对2013年1月31日发生在首都机场附近地区的一次冻雨过程进行模拟，得出以下结论：1）模拟结果中的云顶温度与FY-2E的TBB逐小时资料对应较好：此次冻雨过程，整个降水云系云顶温度在0~-6℃之间，模拟结果水成物的垂直分布也得到了较好的印证；通过FY-3A反演的云顶高度日平均资料的检验，证明此次冻雨过程的云高基本维持在3 km左右，而且云微物理固态项的含量少。2）云顶温度、云顶高度实况与模式模拟表明此次过程是一次典型的暖雨机制冻雨，这说明产生北方冻雨的可能机制并不单一，冰相机制与暖雨机制可以同时存在。
- 冻雨 /
- 暖雨机制 /
- WRF模式 /
- FY-2E数据
Abstract: In order to investigate the possible mechanism of freezing rain process, the WRF model (Weather Research and Forecasting) was used to simulate a freezing-rain process occurred on 31 Jan 2013 in the area of the Beijing Capital International Airport. The NECP reanalysis data, the Black Body Temperature (TBB) of FY-2E, the daily average cloud height data of FY-3A are used to verify the model simulation. Major conclusions are as follows:1) The cloud top temperature of the simulation is consistent with TBB of FY-2E. During the freezing rain process, the cloud top temperature varied between 0--6℃, and the simulated vertical distribution of the hydrometeors agree well with observations. According to the cloud top height derived from FY-3A observations, it is found that the cloud top in the freezing-rain process basically remained at around 3 km, and the clouds contained less microphysical solid contents. 2) Observed cloud top temperature and height and the simulation results show that this is a typical warm freezing rain process. This result indicates that the mechanism for the formation of freezing rain in northern China may not be single. Ice-crystal processes and warm-rain processes may simultaneously exist during the formation of freezing rain.
- Freezing-rain /
- warm-rain mechanism /
- WRF model /
- FY-2E data

HTML全文

图 1 2013年1月30日(a)850 hPa相对湿度(%)与风场和(b)500 hPa位势高度(单位：gpm)

Figure 1. (a) 850-hPa relative humidity (%) and winds and (b) 500-hPa geopotential height (gpm) on 30 Jan 2013

下载: 全尺寸图片幻灯片

图 2 FY-2E卫星2013年1月31日云顶亮温(TBB)实况(单位：℃)：(a)00:00；(b)01:00；(c)02:00；(d)03:00

Figure 2. Black Body Temperature (TBB, ℃) from FY-2E satellite observations on 31 Jan 2013: (a) 0000 UTC; (b) 0100 UTC; (c) 0200 UTC; (d) 0300 UTC

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图 3 2013年1月31日FY-3A卫星日平均云顶高度(单位：km)

Figure 3. Daily mean cloud top height (km) from FY-3A satellite observations on 31 Jan 2013

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图 4 数值模拟计算2013年1月31日(a)00:00、(b)01:00、(c)02:00、(d)03:00液态水成物(阴影)与固态水成物(实线，单位：g/kg)混合比及温度(红线)垂直剖面

Figure 4. Vertical cross sections of liquid hydrometeor (shading), solid particles (solid lines, units: g/kg) and temperature (red lines, units: ℃) from numerical simulation at (a) 0000 UTC, (b) 0100 UTC, (c) 0200 UTC, and (d) 0300 UTC on 31 Jan 2013

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表 1 模式试验设计

Table 1. Design of model experiment

模式中心点	模式区域	格点数(纬向×经向)	格距/km	积云对流参数化方案	云微物理方案	边界层方案	陆面方案	长波辐射方案	短波辐射方案
（40.06°N，15.24°E）	D01	100×100	36	KF方案	WSM6方案	MYJ方案	Noah方案	RRTM方案	Dudhia方案
	D02	163×160	12	KF方案	WSM6方案	MYJ方案	Noah方案	RRTM方案	Dudhia方案
	D03	214×208	4		WSM6方案	MYJ方案	Noah方案	RRTM方案	Dudhia方案

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