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科学通报  2012 

基于TES观测的2005~2010年间中国3个代表性区域对流层臭氧浓度变化分析

, PP. 1454-1461

Keywords: TES,臭氧,中国,变化趋势,季节变化

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Abstract:

臭氧(O3)是大气中复杂光化学反应的产物.对流层臭氧既是全球性污染物,又是温室气体.本文采用Aura卫星上搭载的对流层辐射光谱仪(troposphericemissionspectrometer,TES)获得的对流层O3垂直分布数据,基于傅里叶变换,分析了2005~2010年间我国3个代表性区域(西部、华北和华南地区)的对流层臭氧在484,681和825hPa高度上的浓度变化趋势以及季节分布特点.结果显示,在中国大部分地区,O3浓度均呈现夏季高冬季低的特点,而在华南地区和华北近地面,臭氧呈现明显的春秋季双峰值现象.臭氧在464hPa高度上均呈现比较明显的增长趋势,其中华北地区增长速率最快,达到0.89±0.059nL(La)-1.在681hPa,我国华北和西部地区的臭氧都出现了明显的增长趋势,平均年增长率分别为0.57±0.065和0.41±0.041nL(La)-1;而华南地区O3浓度趋势却无明显变化.在近地面的825hPa,华北地区臭氧浓度仍然保持了0.36±0.074nL(La)-1的增长速度,而华南地区则呈现了微弱的-0.21±0.061nL(La)-1的下降趋势.在全国尺度上,我国对流层臭氧浓度在2005~2010年间整体呈现上升趋势,这将对我国的人体健康、农业生产和生态系统造成不良影响.

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