Diurnal haze variations over the North China plain using measurements from Himawari-8/AHI
Diurnal haze variations over the North China plain using measurements from Himawari-8/AHI
复制标题
使用 Himawari-8/AHI 测量的华北平原日雾霾变化
DOI：
10.1016/j.atmosenv.2019.04.036
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发表时间：
2019-08
影响因子：
5
通讯作者：
Liu C.
中科院分区：
文献类型：
--
作者：
Shang H.;Letu H;Pan X.;Wang Z.;Ma R.;Liu C.
灰霾特性的日变化是了解灰霾污染形成及其环境影响的基础。地面测量可以提供具有高时间分辨率的信息，但霾测量在空间上不是连续的。下一代地球同步卫星Himawari-8上搭载的高级Himawari成像仪（AHI）传感器可以提供具有高空间和时间分辨率的烟雾特性。利用2015-2017年华北平原夏季和冬季的霾频次、霾特征（气溶胶光学厚度（AOD）、埃指数（AE）和细颗粒物比（RF））和云量的日变化特征，分析了华北平原夏季和冬季霾频次、霾特征和云量的日变化特征。雾和云方案和雾属性都得到了很好的验证。结果表明：冬季灰霾发生频率（33.51%）明显高于夏季（6.34%），冬季气溶胶光学厚度（0.2-0.9）日变化强于夏季（0.5-0.9）。夏季日最大灰霾频率值（16：00 p.m.）比最严重污染（13：00 p.m.）晚3 h，AOD值为0.7-0.9，AE值为1.1-1.2，RF值为0.5-0.6。冬季，9时至15时霾频次增加。然而，没有典型的日变化的AOD，AE和RF显示。同时还发现，灰霾的日变化规律与云的日变化规律相反。
The diurnal variations of haze properties are essential in understanding the haze pollution formation and its environmental impact. Ground-based measurements can provide this information with high temporal resolution, but the haze measurements are not spatially continuous. The Advanced Himawari Imager (AHI) sensor onboard the next-generation geostationary satellite Himawari-8 can provide haze properties with high spatial and temporal resolution. In this study, the diurnal variations of haze frequency, haze properties [aerosol optical depth (AOD), Angstrom exponent (AE) and fine-particle ratio (RF)] and cloud cover are jointly analyzed over the North China Plain (NCP) for summer and winter seasons during 2015–2017. Both the haze and cloud scheme and the haze properties are well validated. The results reveal that the haze frequency in winter (33.51%) is much higher than that in summer (6.34%), and the diurnal variations of AOD values in winter (0.2–0.9) are stronger than those in summer (0.5–0.9). The diurnal maximum haze frequency values in summer (16:00 p.m.) occur 3 h later than the most severe pollution (13:00 p.m.), with AOD values of 0.7–0.9, AE values of 1.1–1.2 and RF values of 0.5–0.6. In winter, the haze frequency increases from 9:00 to 15:00. However, no typical diurnal variations of AOD, AE and RF are shown. It is also found that haze frequency exhibits opposite diurnal variations compared with those of clouds.
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作者：
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