摘要
基于OMI卫星资料,分析了2005—2014年中国中东部地区对流层低层ρ(O_3)、对流层NO_2柱浓度及甲醛总柱浓度的时空演变趋势及相互关系.结果表明:近10年来,中国中东部地区对流层低层ρ(O_3)呈上升趋势,2005年及2014年分别为60.64、69.43μg/m^3,年均增长率为1.6%;对流层低层ρ(O_3)增长的区域面积不断扩大,部分地区增长超23μg/m^3;呈春夏季高,冬季最低的分布趋势.2005—2012年,对流层NO_2柱浓度呈上升趋势,2005年及2012年分别为4.41×10^(15)、5.90×10^(15)mol/cm^2,年均增长率为4.8%;2012年后呈下降趋势,下降的区域面积逐步扩大,部分地区降低约15×10^(14)mol/cm^2;呈冬季最高、夏季最低的分布特征;2005—2010年甲醛总柱浓度呈上升趋势,2005年及2010年分别为9.74×10^(15)、1.59×10^(16)mol/cm^2,年均增长率为12.6%,2010年后呈下降趋势;呈夏季最高、冬季最低的分布特征;甲醛总柱浓度增长的区域面积逐渐扩大.利用甲醛与NO_2柱浓度比值探讨臭氧控制区的空间分布特征,表明鲁豫晋、京津冀、长三角及珠三角地区中心城市属于VOCs控制区,周围城市属于VOCs-NO_x协同控制区,其他地区属于NOx控制区.
Spatial-temporal characteristics and relationships for lower tropospheric ozone （03 ）, tropospheric column nitrogen dioxide （NO2） and total column formaldehyde （HCHO） over central and eastern China from 2005 to 2014 were analyzed based on Ozone Monitoring Instrument （OMI） satellite data. The results showed that the annual 03 concentration had an increasing trend of 1.6% per year. 03concentrations were 60. 64 and 69.43 g/m3 in 2005 and 2014, respectively. The greatest increase occurred in spring and summer, followed by autumn, with the lowest increase in winter. In conjunction with the increase in 03 concentrations, the spatial extent of regions impacted by high 03 continued to expandand increase by 23 μg/m3 in some areas. The NO2 concentration also increased from 2005 to 2012, at 4. 8% per year. NO2 concentrations were 4.41 x 1015 and 5.9 x 1015mol/cm2 in 2005 and 2012, respectively,and NO2 concentration decreased after 2012. The greatest increase occurred in winter, while the lowest occurred in summer. The spatial extent ofregions experiencing a decrease in NO2 concentration continued to expand and decreased by 15 x 1014 mol/cm2 in some area. The HCHO concentrations increased from 2005 to 2010, at 12.6% per year. HCHO concentrations were 9. 74 - 10Is and 1.59 x1016 mol/cm2 in 2005 and 2010 respectively, and HCHO concentration decreased after 2010. The highest increase occurred in summer,while the lowest one occurred in winter. The spatial extent of elevated HCHO concentration continued to expand. HCHO/NO2 ratio was used as a preliminary indicator for the spatial extent of different ozone precursor control regimes over eastern China. Key cities of Henan- Shanxi-Shandong, Beijing-Tianjin-Hebei, Yangtze River Delta and Pearl River Delta regions were currently limited by VOCs, while other cities were limited by VOCs-N0, and NO,.
出处
《环境科学研究》
EI
CAS
CSSCI
CSCD
北大核心
2016年第8期1128-1136,共9页
Research of Environmental Sciences
基金
国家科技支撑计划项目(2014BAC22B03)
上海市环境保护局重大课题研究项目〔沪环科(2014-01)〕
作者简介
单源源（1991-），女，江苏南通人，yuan_yuan_shan@sina．com．
李莉（1979-），女，山东德州人，高级工程师，博士，主要从事大气复合污染成因与控制研究，lili@saes．sh．cn
