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气象:2018,44(10):1306-1317
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GOSAT卫星二氧化碳遥感产品的验证与分析
孟晓阳,张兴赢,周敏强,白文广,周丽花,余骁,胡玥明
(中国气象科学研究院,北京 100081; 国家卫星气象中心,北京 100081; 比利时高层大气物理所,布鲁塞尔 1180,比利时; 北京师范大学,北京 100875; 成都信息工程大学,成都 610225)
Validation and Analysis of GOSAT XCO2 Measurements by TCCON Sites
MENG Xiaoyang,ZHANG Xingying,ZHOU Minqiang,BAI Wenguang,ZHOU Lihua,YU Xiao,HU Yueming
(Chinese Academy of Meteorological Sciences, Beijing 100081; National Satellite Meteorological Centre, Beijing 100081; Belgian Institute for Space Aeronomy, Brussels 1180, Belgium; Beijing Normal University, Beijing 100875; Chengdu University of Information Technology, Chengdu 610225)
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投稿时间:2018-04-03    修订日期:2018-07-20
中文摘要: 本文利用全球地基二氧化碳柱浓度观测站点(Total Carbon Column Observing Network,TCCON)18个站点CO2地基观测数据对GOSAT(Greenhouse gases Observing Satellite)2009—2017年的大气CO2遥感反演产品进行验证分析,结果显示卫星CO2遥感产品与地基遥感观测结果较为一致,在东亚、北美、欧洲和大洋洲四个区域内卫星遥感产品与地基观测的平均偏差分别为2.23±2.69、2.19±2.19、2.01±2.49、1.59±1.79 ppm,相关系数不低于0.75。卫星在30°S~60°N范围内的产品精度较高,而在高纬地区产品精度稍低。本文进一步利用GOSAT L2 XCO2遥感反演产品对全球大气CO2的长时间序列变化进行了分析,结果表明2009—2017年全球大气CO2浓度呈持续上升趋势,全球年平均增长率为2.22 ppm·a-1,增长较快的国家和地区包括中国、美国、印度和非洲,受与厄尔尼诺有关的自然排放影响,2016年相对上一年的增长量最多,年均CO2绝对增量在3 ppm以上。
Abstract:The data from 18 sites of TCCON are used for the validation of GOSAT XCO2 products from 2009 to 2017, which show a consistency between satellite data and ground based measurements. Biases between the satellite data and ground based measurements in East Asia, North America, Europe and Oceania are 2.23±2.69, 2.19±2.19, 2.01±2.49, 1.59±1.79 ppm, respectively, and the correlation coefficient is not less than 0.75. The accuracy of satellite products is higher in the range of 30°S-60°N, but slightly lower in high latitudes. In addition, authors also use GOSAT L2 XCO2 products to analyze the change of global atmospheric CO2 in long term sequence. The results show that the concentration of global atmospheric CO2 shows a continuous upward trend from 2009 to 2017, and the global average annual growth rate is 2.22 ppm·a-1. There are some fast growing countries and regions, including China, the United States, India, and Africa. Influenced by natural emissions of El Ni〖AKn~D〗o, the concentration of atmospheric CO2 grew the fastest in 2016, with the growth rate being more than 3 ppm·a-1.
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基金项目:国家重点研发计划(2017YFB0504001和2016YFB0500705)、国家自然科学基金面上项目(41775028)及高分辨率对地观测系统重大专项应用共性关键技术项目(32 Y20A17 9001 15/17和32 Y20A18 9001 15/17)共同资助
引用文本:
孟晓阳,张兴赢,周敏强,白文广,周丽花,余骁,胡玥明,2018.GOSAT卫星二氧化碳遥感产品的验证与分析[J].气象,44(10):1306-1317.
MENG Xiaoyang,ZHANG Xingying,ZHOU Minqiang,BAI Wenguang,ZHOU Lihua,YU Xiao,HU Yueming,2018.Validation and Analysis of GOSAT XCO2 Measurements by TCCON Sites[J].Meteor Mon,44(10):1306-1317.