珠江三角洲对流层HCHO柱浓度遥感监测及影响因子

基于OMI卫星遥感反演数据，对珠江三角洲地区2009年~2016年对流层甲醛柱浓度时空分布特征及其影响因素进行研究.结果表明，珠江三角洲甲醛柱浓度时间变化特征为：8年来呈波动变化趋势，年均值为13.11×10¹⁵ molec/cm²，最低值出现于2012年，最高值出现于2016年；最大降低率为5.8%，最大增长率为6.3%.每年夏季最高，冬季最低，大小依次为夏季 > 秋季 > 春季 > 冬季，8a来96个月甲醛月际变化幅度较大，呈单峰结构，其中每年6月最高；空间变化特征为：甲醛柱浓度值由西北往东南递减，其中以肇庆东北大部、佛山北部和广州西部组成高值区分布中心，以佛山中南部、广州东南半部和江门西北半部组成三级次高级分布区，以惠州、东莞、深圳、中山、珠海和江门等珠江三角洲近海岸地区为一二级低值浓度区；影响因素中气温与气压等气象因素对HCHO的生成和分布有着促进作用，植被对HCHO的产生有一定的贡献，甲醛柱浓度的变化与汽车保有量、地区生产总值等经济发展要素呈现正相关关系，能源消耗总量与工业废气排放总量的增加与甲醛柱浓度增长密切相关，人为因素是甲醛柱浓度变化的主要原因.

Remote sensing monitoring of tropospheric HCHO column concentration and influential factors over pearl river delta,China

Satellite remote Sensing data Retrieval based on OMI, the temporal and spatial distribution characteristics of formaldehyde column concentration in the troposphere and its influencing factors in the Pearl River Delta region from 2009 to 2016were studied. The results show that the concentration change of formaldehyde column in the Pearl River Delta was characterized by fluctuations in the past 8years, with an average annual value of 13.11×10¹⁵ molec/cm², the lowest value appeared in 2012 and the highest value appeared in 2016, the maximum reduction rate was 5.8%, the maximum growth rate was 6.3%. The highest in summer and the lowest in winter, the order was summer > autumn > spring > winter, and the monthly variation of formaldehyde in 8a to 96months was larger, showing a single peak structure, with the highest in June every year; The spatial variation was characterized by:The concentration of formaldehyde column decreases from northwest to southeast. Among them, the distribution center of the northeastern part of Zhaoqing, the northern part of Foshan and the western part of Guangzhou constitutes the distribution center of high value area. It consists of the third-level sub-level distribution area in the south-central part of Foshan, the southeastern part of Guangzhou and the northwest half of Jiangmen. In Huizhou, Dongguan, Shenzhen, Zhongshan, Zhuhai and Jiangmen, the coastal areas of the Pearl River Delta are the first-level low-value concentration areas. Meteorological factors such as temperature and pressure affect the formation and distribution of HCHO, and vegetation has a certain contribution to the production of HCHO. There is a positive correlation between the change of formaldehyde column concentration and the factors of economic development, such as automobile ownership, regional GDP, etc, the increase of total energy consumption and total industrial waste gas emission was closely related to the increase of formaldehyde column concentration, and the main reason for the change of formaldehyde column concentration was human factors.