Characteristics Variation of Atmospheric CO_(2)and CH_(4)in Yongxing Island,South China Sea  

作　　者：LV Honggang JIANG Yifei WANG Haiyan 

机构地区：[1]Key Laboratory of Marine Hazards Forecasting,National Marine Environmental Forecasting Center,Ministry of Natural Resources(MNR),Beijing 100081,China [2]National Marine Environmental Forecasting Center,Beijing 100081,China

出　　处：《Journal of Ocean University of China》2024年第2期438-446,共9页中国海洋大学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.41907180).

摘　　要：Using the observation data in Yongxing Island,South China Sea(SCS)from December 2013 to November 2018,the multiple time scales variation of atmospheric CO_(2)and CH_(4)were analyzed to understand their temporal variation characteristics and controlling factors.The regional-averaged background mole fractions of CO_(2)and CH_(4)both show a single-period sinusoidal variation with a lower value at noon and a higher value in the wee hours.In the seasonal scale,they exhibited a significant seasonal difference with higher values in winter and lower values in summer.In the annual scale,CO_(2)and CH_(4)both show an increasing trend,with an annual growth rate of approximately 3.2 ppm and 12 ppb,respectively.The annual growth rate at this site was higher than the global average.The change in atmospheric CO_(2)and CH_(4)in Yongxing Island was probably caused by the higher emission of the surrounding areas and the airflows driven by monsoon.Hopefully,the long-term and high-resolution greenhouse gases(GHGs)dataset will aid relevent researchers and decision-makers in performing more in-depth studies for GHG sources in order to derive effective strategies.

关 键 词：carbon dioxide METHANE OBSERVATION backward trajectory atmospheric transport 

分 类 号：P402[天文地球—大气物理学与大气环境]