摘要
为了更加充分地了解中国地区甲烷浓度的分布情况,利用C3S提供的甲烷浓度资料分析2003~2018年中国地区甲烷浓度的时空分布特征。结果表明:①甲烷浓度呈现东南高西北低的分布情况,甲烷浓度高值区主要分布在湖南、湖北、广西等地,低值区位于青海和西藏等地。我国甲烷浓度年际变化随时间呈增长趋势,2003~2006年甲烷浓度保持相对稳定,2007~2018年甲烷浓度出现明显的上升。②甲烷浓度具有明显的季节变化特征,夏秋季高于春冬季,其中秋季浓度最高为1781 ppbv,春季浓度最低为1748 ppbv。甲烷浓度的高峰值出现在8、9月份,低峰值出现在3、4月份。③为了更好地分析中国地区甲烷浓度,将我国分为六大地理区域,分别是东北地区、中南地区、华东地区、华北地区、西北地区、西南地区。其中,华东地区和中南地区的甲烷浓度较高,西北地区和西南地区的甲烷浓度较低。
In order to better understanding the distribution of CH4 concentration in China,this study analyzed the temporal and spatial distribution characteristics of CH4 concentration in China from 2003 to 2018 using CH4 concentration data provided by C3C.The results show that:(1)In terms of spatial distribution,the CH4 concen⁃tration features a pattern of high concentration in the southeast and low concentration in the northwest,with high values mainly distributed in Hunan,Hubei,and Guangxi,and low values in Qinghai and Tibet.The inter⁃annual variation of CH4 concentration in China showed an increasing trend over time.The methane concentra⁃tion remained relatively stable from 2003 to 2006,and increased significantly from 2007 to 2018.(2)The CH4 concentration exhibits a significant seasonal variation,with higher concentrations in summer and autumn and lower concentrations in spring and winter.The highest concentration was 1781 ppbv in autumn,while the low⁃est concentration was 1748 ppbv in spring.The peak concentration occurred in August and September,and the low point occurred in March and April.(3)In order to better analyze methane concentration in China,China is divided into six geographical regions,which are Northeast China,South Central China,East China,North Chi⁃na,Northwest China,Southwest China.Methane concentrations are higher in East China,South Central Chi⁃na,and lowest in the Northwest China,Southwest China.
作者
彭禹奇
蔡宏珂
蔡兆男
PENG Yuqi;CAI Hongke;CAI Zhaonan(School of Atmospheric Sciences,Chengdu University of Information Technology,Chengdu 610225,China;Carbon Neutrality Research Center(CNRC),Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China)
出处
《遥感技术与应用》
CSCD
北大核心
2024年第4期841-849,共9页
Remote Sensing Technology and Application
基金
国家自然科学基金区域创新发展联合基金项目“青藏高原东侧复杂地形区域极端降水的时空演变特征、形成机理及趋势预估研究”(U20A2097)
国家自然科学基金项目“基于卫星遥感的青藏高原降水云的宏微观特征研究”(42075087)。
关键词
甲烷
时空尺度
多年变化
中国
Methane
Spatio-temporal distribution
Multi-years variation characteristic
China
