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高原气象  2018, Vol. 37 Issue (4): 1110-1119    DOI: 10.7522/j.issn.1000-0534.2018.00009
论文     
激光雷达和微波辐射计对邢台市一次沙尘天气的探测分析
郝巨飞1, 袁雷武2, 李芷霞1, 齐佳慧1, 施海瑞1
1. 邢台市气象局, 河北 邢台 054000;
2. 唐山市气象局, 河北 唐山 063000
The Detection and Analysis of Dust Weather by Lidar and Microwave Radiometer in Xingtai
HAO Jufei1, YUAN Leiwu2, LI Zhixia1, QI Jiahui1, SHI Hairui1
1. Xingtai Meteorological Office of Hebei, Xingtai 054000, Hebei, China;
2. Tangshan Meteorological Office of Hebei, Tangshan 063000, Hebei, China
 全文: PDF 
摘要: 利用气溶胶激光雷达、地基多通道微波辐射计资料,反演得到邢台市2017年5月3-5日沙尘天气过程前后的消光系数、退偏比和高空的温度、湿度变化,结合后向轨迹模式等资料,分析了沙尘天气过程前后的天气形势、颗粒物污染特征及来源、消光系数、退偏比等的变化。结果表明:来源于新疆北部的沙尘气溶胶受地面冷锋东移南下影响,以西北路径远距离输送沉降是导致邢台市颗粒污染物浓度骤升的主要原因,而本地大风的出现会导致由地面向高空扩散形成的沙尘污染次高峰,其中细颗粒物PM10的浓度升幅远大于PM2.5浓度升幅;在高空2 000 m附近集聚的沙尘气溶胶可以形成消光系数大于1 km-1的强值区,沙尘聚集区域的退偏比平均值为0.252,与下层退偏比平均值为0.041的区域形成一个明显的沙尘分界线,消光系数的强值中心和退偏比的高低值分界线可以很好地表征出高空沙尘粒子的沉降变化;在高空沙尘沉降和地面大风引起的沙尘天气时,地面温度都出现了升高态势,在地面颗粒污染物浓度出现剧烈增加前,整层大气湿度呈现陡降趋势,而在颗粒污染物浓度处于高值波动阶段,整层大气湿度均维持在一个较低的水平。
关键词: 沙尘激光雷达微波辐射计大气污染    
Abstract: Based on aerosol lidar and ground-based multichannel microwave radiometer data, combined with backward trajectory model and other data, the high-altitude extinction coefficient, the depolarization ratio, the temperature and the humidity of Xingtai city were calculated and analyzed during May 3-5, 2017. The results showed that:The main reason for the increase of particulate pollutant concentration in Xingtai is the dust deposition which transported at a distance from the northwest, and the dust from northern Xinjiang is affected by cold front moving eastward, local winds also cause dust pollution from the ground to high altitude, and the increase in PM10 concentration is much higher than that of PM2.5. The sand dust that collected near the height of 2 000 m can form a strong value region with extinction coefficient greater than 1 km-1. The average value of depolarization ratio of sand dust accumulation area is 0.252, and a clear sand dust boundary is formed in the region with lower average deviation ratio of 0.041, the strong value center of the extinction coefficient and the sand dust boundary of the depolarization ratio can be used to characterize the change of dust deposition. the ground temperature has increased when dust deposition or sand dust was caused by ground wind, The atmospheric humidity in the whole layer shows a steep downward trend before the concentration of terrestrial particulate pollutants increases sharply, and the atmospheric humidity of the whole layer is maintained at a low level, the concentration of the particle pollutant is in the high value fluctuation stage.
Key words: Sand-dust    lidar    microwave radiometer    air pollution
收稿日期: 2017-09-20 出版日期: 2018-08-22
:  X513  
基金资助: 河北省“十三五”气象重点工程—云水资源开发利用工程(hbrywcsy-2017-6);河北省科技厅科研项目(15274204D)
作者简介: 郝巨飞(1981-),男,陕西榆林人,高级工程师,主要从事环境气象预报服务的研究.E-mail:dragonland@126.com
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引用本文:

郝巨飞, 袁雷武, 李芷霞, 齐佳慧, 施海瑞. 激光雷达和微波辐射计对邢台市一次沙尘天气的探测分析[J]. 高原气象, 2018, 37(4): 1110-1119.

HAO Jufei, YUAN Leiwu, LI Zhixia, QI Jiahui, SHI Hairui. The Detection and Analysis of Dust Weather by Lidar and Microwave Radiometer in Xingtai. Plateau Meteorology, 2018, 37(4): 1110-1119.

链接本文:

http://www.gyqx.ac.cn/CN/10.7522/j.issn.1000-0534.2018.00009        http://www.gyqx.ac.cn/CN/Y2018/V37/I4/1110

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