Climatic characteristics and regionalization of fogs in China

International Conference on Energy Engineering and Environmental Protection 2016

能源学;生态环境科学

Hao, T.Y.^1 ; Chen, S.C.^2 ; Han, S.Q.^3 ; Shan, X.L.^4 ; Meng, L.H.^3

Tianjin Environmental Meteorological Centre, Tianjin

300074, China^1

Tianjin Meteorological Observation Centre, Tianjin

300061, China^2

Tianjin Institute of Meteorological Science, Tianjin

300074, China^3

Tianjin Binhai New Area Meteorological Bureau, Tianjin, 300457, China^4

关键词: Concentration degree;    Distribution characteristics;    Meteorological data;    Occurrence frequencies;    Southeastern china;    Spatial distribution patterns;    Spatial patterns;    Trend coefficients;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/52/1/012056/pdf
DOI  :  10.1088/1742-6596/52/1/012056

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Using trend coefficient method, vector analysis method, and monitored meteorological data across China, climatic characteristics and spatial pattern of fogs in China were investigated. The results show that most fogs occur in southeastern China. Thin fogs usually occur in fog-rare regions and dense fogs take place in fog-prone regions. The number of annual fog days in most regions of China exhibits a decreasing trend from 1980 to 2010. It also found that the regions with more fog days correspond to the lower concentration degree of fogs, and vice versa. In terms of the national scale, the concentration periods of fogs are mainly in November, December, and January in China. We further classified the occurrence frequencies of fogs into five spatial distribution patterns over a single year according to the spatial distribution characteristics of fogs occurrence frequencies of 36 dekads, namely, a whole year can be correspondingly divided into five phases. Based on this, multi-year average fog-prone regions in the five phases are obtained. Our results also identify the high incidence periods of fogs in different fog-prone regions.