Study on the Characteristics of Atmospheric CO2 Concentration Variations and Source-sink at Luancheng Station in Hebei
WU Guoming
HU Yannan
LI Wenxing
SUN Wanqi
WU Dongqiao
Abstract：Based on the online observation data of CO2 concentration at Luancheng Station in Hebei from May 2018 to November 2019,the diurnal and seasonal variation characteristics of CO2,the influence of near-surface wind and regional transport were analyzes.The results showed that CO2 concentration was low in the evening and high in the morning,with the latest occurrence time of the lowest value in summer and the latest occurrence time of the highest value in winter.The back-ground CO2 concentrations exhibited a unimodal distribution,with the highest value in winter(515.18×10-6)and the lowest value in summer(388.17×10-6).The northwesterly wind had a cleansing effect on the CO2 concentration at Luancheng Station.In winter,due to high local emissions from coal combustion,the CO2 concentration was less affected by near-surface wind speed and direction.The air masses affecting the CO2 polluted concentration at Luancheng Station were mainly transported from short distances.In spring and summer,the pollution was mainly transported from northern Anhui via Henan and from Shandong.In autumn and winter,local air masses from the central and southern Hebei brought high CO2 concentrations.The primary potential emission source areas for CO2 at Luancheng Station were central and southern Hebei,Shandong,northern Henan,and northern Anhui.The high carbon emissions during the heating period in central and southern Hebei were the main cause of high CO2 concentrations in autumn and winter.
Keywords：carbon dioxidediurnal variationseasonal variationsource-sink characteristicsbackward trajectory
Publication Date：2025-06-30
Online Publishing Date：2025-09-22(First online date of this platform, not the publication date of the document)
Pages：8( 73-80 )