| THE SPATIOTEMPORAL CHARACTERISTICS OF LIGHT RAIN DAYS AND LOW CLOUD COVER UNDER HEAVY
POLLUTION OVER SOUTH CHINA |
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| 作者姓名： | 符传博 丹 利 陈 红 何 鑫 |
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| 摘 要： | By using the data set of light rain days and low cloud cover at 51 stations in South
China (SC), and the method of linear regression and correlative analysis, we analyze the
spatiotemporal characteristics of the light rain days and low cloud cover including annual
variation and long-term seasonal change. The results are as follows: (1) The trends of light
rain days and low cloud cover over SC are opposite (light rain days tended to decrease and low
cloud cover tended to increase in the past 46 years). The value distributed in east is higher
than that in west, and coastal area higher than inland area. (2) The regression coefficients
of light rain days and low cloud cover during 1960–2005 are 4.88 d/10 years and 1.14%/10
years respectively, which had all passed the 0.001 significance level. (3) Variations of light
rain days are relatively small in spring and summer, but their contributions are larger for
annual value than that of autumn and winter. (4) There are two regions with large values of
aerosol optical depth (AOD), which distribute in central and southern Guangxi and Pearl River
Delta (PRD) of Guangdong, and the value of AOD in PRD is up to 0.7. The aerosol index
distributed in coastal area is higher than in the inland area, which is similar to the light
rain days and low cloud cover over SC. Aerosol indexes in SC kept increasing with fluctuation
during the past 27 years. The GDP of the three provinces in SC increased obviously during the
past 28 years, especially in Guangdong, which exhibited that there is simultaneous correlation
between light rain days with the variables of low cloud cover and release of aerosols over SC
during 1960 to 2005.
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| 关 键 词： | light rain days low cloud cover AOD Aerosol index South China |
| 修稿时间： | 2017/2/20 0:00:00 |
THE SPATIOTEMPORAL CHARACTERISTICS OF LIGHT RAIN DAYS AND LOW CLOUD COVER UNDER HEAVY
POLLUTION OVER SOUTH CHINA |
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| FU Chuan-bo,DAN Li,CHEN Hong and HE Xin.THE SPATIOTEMPORAL CHARACTERISTICS OF LIGHT RAIN DAYS AND LOW CLOUD COVER UNDER HEAVY
POLLUTION OVER SOUTH CHINA[J].Journal of Tropical Meteorology,2017,23(2):229-236. |
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| Authors: | FU Chuan-bo DAN Li CHEN Hong and HE Xin |
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| Institution: | 1. Key Laboratory of Regional Climate-Environment Research for Temperate East Asia, Institute
of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029 China; 2. Hainan
Meteorological Observatory, Haikou, 570203 China |
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| Abstract: | By using the data set of light rain days and low cloud cover at 51 stations in South China(SC), and the method of linear regression and correlative analysis, we analyze the spatiotemporal characteristics of the light rain days and low cloud cover including annual variation and long-term seasonal change. The results are as follows:(1) The trends of light rain days and low cloud cover over SC are opposite(light rain days tended to decrease and low cloud cover tended to increase in the past 46 years). The value distributed in east is higher than that in west, and coastal area higher than inland area.(2) The regression coefficients of light rain days and low cloud cover during 1960-2005 are4.88 d/10 years and 1.14%/10 years respectively, which had all passed the 0.001 significance level.(3) Variations of light rain days are relatively small in spring and summer, but their contributions are larger for annual value than that of autumn and winter.(4) There are two regions with large values of aerosol optical depth(AOD), which distribute in central and southern Guangxi and Pearl River Delta(PRD) of Guangdong, and the value of AOD in PRD is up to 0.7.The aerosol index distributed in coastal area is higher than in the inland area, which is similar to the light rain days and low cloud cover over SC. Aerosol indexes in SC kept increasing with fluctuation during the past 27 years. The GDP of the three provinces in SC increased obviously during the past 28 years, especially in Guangdong, which exhibited that there is simultaneous correlation between light rain days with the variables of low cloud cover and release of aerosols over SC during 1960 to 2005. |
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| Keywords: | light rain days low cloud cover AOD Aerosol index South China |
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