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鲁中地区霾期间气溶胶的垂直分布 及其与气象条件的关系
张琴
(淄博市气象局)
The vertical distribution of aerosol and its relationship with atmospheric Meteorological conditions during haze in Luzhong Area
zhangqin
(Zibo Meteorological Bureau of Shandong Province)
摘要
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投稿时间:2021-01-04    修订日期:2021-07-14
中文摘要: 利用CALIPSO(The Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation)气溶胶垂直廓线产品和NCEP提供的FNL(Final Operational Global Analysis) 1°×1°再分析数据,以清洁日为对比,统计分析了2007-2017年霾和重度霾期间鲁中地区气溶胶的垂直分布规律,并探讨了两者之间的关系。结果表明:霾、重度霾日的气溶胶粒子主要聚集在对流层低层2.7km、1.5km以下。以0.9,1.66,1.34km为临界高度,清洁日、霾日、重度霾日的消光系数(EC,Extinction Coefficient)在临界高度以上呈指数递减,以下呈对数递减。霾日和重度霾日年平均体积退偏比(PDR,Particulate Deploarization Ratio)和色比(CR,Color Ratio)范围为0.1-0.3和0.5-0.9。低层2km以下,重度霾日以相对规则的细粒子为主;2-4km,不规则度和尺寸都急剧增大。PDR在7km以下随高度逐步增加,7km以上逐步减小。与清洁日不同,霾日CR基本随高度逐渐增大,重度霾日则在6km以下随高度逐渐增大。污染沙尘型气溶胶对重度霾日和霾日近地面的EC贡献最大,分别为0.58km-1和0.35km-1,其次是大陆污染型,分别为0.27km-1和0.20km-1。在2-4km,沙尘型对重度霾,烟尘型对霾日EC有一定的作用。重度霾日在1.5km以下维持了较小的平均风速和较大的相对湿度,有利于EC的增大。霾日在较高的高度上维持了相对较小的平均风速和相对较大的相对湿度,使得气溶胶高浓度层达2.7km。霾时近地面污染物来源为蒙古、内蒙等地的长距离传输和周边省份的传输。重度霾时蒙古方向和河南方向的污染物传输占比更大,分别达25.26%和31.58%。重度霾对应的多层逆温比例接近50%,贴地+低悬型和贴地+高悬型逆温在其中占比最大。由于这两种逆温型在逆温层以下对应更小的出流量,大气更稳定,使得重度霾时气溶胶粒子聚集在低层。
Abstract:The vertical distribution of aerosol and atmospheric meteorological conditions during haze and heavy haze from 2007 to 2017 are analyzed by utilizing date of CALIPSO(The Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation) and NCEP FNL(Final Operational Global Analysis)1°×1° reanalysis data.The results show that aerosol particles in haze and heavy haze mainly concentrate below 2.7km and 1.5km in the lower troposphere.With 0.9, 1.66 and 1.34km as the critical height, the extinction coefficient (EC,Extinction Coefficient) of cleaning days, haze days and heavy haze days decreases exponentially above the critical height and logarithmically below.The average annual Paraticulate Deploarization Ratio (PDR,Particulate Deploarization Ratio) and color ratio (CR,Color Ratio) range of haze days and severe haze days are 0.1-0.3 and 0.5-0.9.In heavy haze, aerosol particles below 2km are relatively regular and small in size, and their irregularity and size increase sharply between 2-4km.PDR increases gradually with height below 7km and decreases gradually above 7km.Different from the cleaning day, CR basically increases with the height in haze.The contribution of polluted dust aerosol to near-ground EC in heavy haze days and haze days is 0.58km-1 and 0.35km-1, respectively.The second is the polluted continental type, 0.27km-1 and 0.20km-1 respectively.In addition, at 2-4km, the dust type has a certain effect on the EC of haze, while the elevated smoke type has a certain effect on the EC of haze.In the heavy haze days, the average wind speed and relative humidity were low below 1.5km, which is conducive to the increase of EC.In haze days, low average wind speed and high relative humidity are maintained at a higher height, making the height of aerosol high concentration layer up to 2.7km.During haze, the sources of near-surface pollutants are long-distance transmission from Mongolia, Inner Mongolia and the neighboring provinces.In heavy haze days, the transport of pollutants in the direction of Mongolia and Henan accounted for more, up to 25.26% and 31.58% respectively.The proportion of multi-layer inversion corresponding to heavy haze is close to 50%, and the proportion of Ground+low-suspended type and Ground+high-suspended type are the largest.Since these two types of inversion correspond to smaller outflow below the inversion layer, the atmosphere is more stable,and aerosol particles are concentrated in the lower layer when there is heavy haze.
文章编号:202101040001     中图分类号:    文献标志码:
基金项目:国家重点研发计划重点专项项目(2018YFC1507804),国家自然科学基金重点项目(42030611,41775048);山东省气象局重点课题(2017sdqx206)
作者单位地址
张琴 淄博市气象局 山东省淄博市张店区北西六路76号淄博市气象局
Author NameAffiliationAddress
zhangqin Zibo Meteorological Bureau of Shandong Province 山东省淄博市张店区北西六路76号淄博市气象局
引用文本:
张琴,0.The vertical distribution of aerosol and its relationship with atmospheric Meteorological conditions during haze in Luzhong Area[J].Meteor Mon,():-.
zhangqin,0.The vertical distribution of aerosol and its relationship with atmospheric Meteorological conditions during haze in Luzhong Area[J].Meteor Mon,():-.