The temporal, spatial variation and influencing factor of formaldehyde column concentration in the Yangtze River Delta in the past 10 years
LI Yang1, JU Tian-zhen1, MA Cheng2, CHANG Feng2, ZHANG Yan-ping2, HE Fan2, WANG Qing-qing1
1. College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China;
2. Zhangye City Environmental Protection Agency, Zhangye 734000, China
The study of air pollution in areas with dense economically developed populations was of great significance for ensuring regional environmental security and human settlement health. This article was based on Aura-OMI HCHO data products, it interpreted and analyzed the quantitative distribution, dynamics and influencing factors of formaldehyde column concentration in the Yangtze River Delta region from 2008 to 2017. The results showed that in the past 10years the average value of formaldehyde column was 14.16×1015 molec/cm2, the maximum value was 15.41×1015 molec/cm2, the minimum value was 12.27×1015 molec/cm2, the maximum growth rate was 17.8%, and the average growth rate was 0.17%, the maximum rate of decline was 15.95%. In time, the concentration of formaldehyde has shown a fluctuating upward trend over the past 10years, mainly in the fourth, third and fifth grades, the highest in summer, followed by spring and autumn, and the smallest in winter. The share ratios in spring, summer, autumn and winter were 25.96%, 34.28%, 22.00%, and 17.76%, respectively. In space, the concentration decreases from the central to the both sides, the coastal area was the lowest, and the high value area gradually shifts from northwest to southeast. The main factors affecting the change of formaldehyde column concentration in the Yangtze River Delta were natural factors and human factors. The natural factors were mainly temperature and precipitation,while the human factors were mainly the total energy consumption, the secondary industry, the tertiary industry, the gross production value,the furniture and building decoration materials. There were spatial-temporal evolutions and influencing factors of the Yangtze River Delta and Beijing-Tianjin-Hebei have similarities and differences.
李阳, 巨天珍, 马成, 常锋, 张延平, 何帆, 王青青. 长江三角洲近10年甲醛柱浓度变化及影响因素[J]. 中国环境科学, 2019, 39(3): 897-907.
LI Yang, JU Tian-zhen, MA Cheng, CHANG Feng, ZHANG Yan-ping, HE Fan, WANG Qing-qing. The temporal, spatial variation and influencing factor of formaldehyde column concentration in the Yangtze River Delta in the past 10 years. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(3): 897-907.
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