摘要
人类活动导致大气中温室气体浓度上升,是全球气候变暖的主要原因之一.本文针对已经连续运行13年的AIRS(Atmospheric Infrared Sounder)卫星反演的对流层中层CO_2浓度资料,利用地基观测结果对其进行验证,同时结合多种相关资料对我国区域CO_2浓度的时空分布及季节变化进行研究.结果显示:北半球30°N—60°N是CO_2浓度高值带,低值中心主要出现在15°S—15°N,140°W向东至100°E的低纬地区.地基观测与AIRS卫星反演结果基本一致,年增长率约为1.926 ppmv·a^(-1).我国区域CO_2浓度空间分布上呈现北高南低的非均匀分布特征,4个高值中心分别位于东北地区西南部、内蒙古西部、新疆地区东部和西部,低值中心在云南和西藏地区.我国区域CO_2浓度有明显的季节变化特征,最高值出现在春季,冬夏季次之,秋季最低,其季节演变特点与风场的输送、降水量的清除和植被的吸收等密切相关.
Increase of greenhouse gas generated by human activities is one of the primary causes for global warming.Mid-troposphere CO2 data retrieved by AIRS(atmospheric infrared sounder),which had been running for 13 years,were validated with ground-based stations observations in this study.Then the spatial and temporal distribution and seasonal variations of CO2 concentration in China were studied with a variety of related data.The results show that there was a high CO2 concentration zone between 30°to 60°over the northern hemisphere,and a low concentration center over low latitudes from 15°S to 15°N,140°W eastward to 100°E.AIRS CO2 products show good agreement with ground observations,with a 1.926 ppmv·a^-1 annual growth rate.Concentration of mid-troposphere CO2 was higher over northern China than over southern China,and there were four centers of high concentration located in the southwest of Northeast China,west Inner Mongolia,east and west Xinjiang,and low concentrations over Yunnan and the Tibetan area.There existed a significant seasonal CO2 variation with peak in spring,followed by winter and summer,and the lowest concentration occurs in autumn.The seasonal evolution of CO2 is closely related to the transport of the wind field,removal of precipitation and absorption of vegetation.
作者
符传博
丹利
冯锦明
彭静
营娜
FU ChuanBo;DAN Li;FENG JinMing;PENG Jing;YING Na(Institute of Atmospheric Physics,Chinese Academy of Sciences,Key Laboratory of Regional Climate-Environment Research for Temperate East Asia,Beijing 100029,China;Hainan Meteorological Observatory,Haikou 570203,China;Beijing Normal University,State Key Laboratory of Earth Surface Process and Resource Ecology,Beijing 100875,China)
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
2018年第11期4373-4382,共10页
Chinese Journal of Geophysics
基金
国家重点研发计划课题“全球CO2非均匀动态分布与地表温度时空关系研究”(2016YFA0602501)
国家自然科学基金项目(41630532,41575093)资助.
关键词
CO2
卫星遥感
非均匀分布
季节变化
中国区域
CO2
Satellite remote sensing
Heterogeneous distribution
Seasonal variation
China
作者简介
符传博,男,1985年生,高级工程师,主要从事大气环境与气候模拟研究.E-mail:hnfuchuanbo@163.com;通讯作者:丹利,男,1973年生,研究员,博士生导师,主要从事陆气相互作用与气候模拟研究.E-mail:danli@tea.ac.cn。
