Characterization of Regional Combustion Efficiency usingΔXCO:ΔXCO_(2)Observed by a Portable Fourier-Transform Spectrometer at an Urban Site in Beijing  

作　　者：Ke CHE Yi LIU Zhaonan CAI Dongxu YANG Haibo WANG Denghui JI Yang YANG Pucai WANG 

机构地区：[1]Key Laboratory of Middle Atmosphere and Global Environment Observation,Institute of Atmospheric Physics,Chinese Academy of Science,Beijing 100029,China [2]Carbon Neutrality Research Center,Institute of Atmospheric Physics,Chinese Academy of Science,Beijing 100029,China [3]University of Chinese Academy of Science,Beijing 100049,China

出　　处：《Advances in Atmospheric Sciences》2022年第8期1299-1315,共17页大气科学进展（英文版）

基　　金：supported by grants from the National Key Research and Development Program of China(Grant No.2017YFB0504000);National Natural Science Foundation of China(Grant No.41875043);the Strategic Priority Research 275 Program of the Chinese Academy of Sciences(Grant No.XDA17010102);External Cooperation Program of the Chinese Academy of Science(Grant No.GJHZ1802);Youth Innovation Promotion Association,CAS.

摘　　要：Measurements of column-averaged dry-air mole fractions of carbon dioxide and carbon monoxide,CO_(2)(XCO_(2))and CO(XCO),were performed throughout 2019 at an urban site in Beijing using a compact Fourier Transform Spectrometer(FTS)EM27/SUN.This data set is used to assess the characteristics of combustion-related CO_(2)emissions of urban Beijing by analyzing the correlated daily anomalies of XCO and XCO_(2)(e.g.,ΔXCO andΔXCO_(2)).The EM27/SUN measurements were calibrated to a 125HR-FTS at the Xianghe station by an extra EM27/SUN instrument transferred between two sites.The ratio ofΔXCO overΔXCO_(2)(ΔXCO:ΔXCO_(2))is used to estimate the combustion efficiency in the Beijing region.A high correlation coefficient(0.86)betweenΔXCO andΔXCO_(2)is observed.The CO:CO_(2)emission ratio estimated from inventories is higher than the observedΔXCO:ΔXCO_(2)(10.46±0.11 ppb ppm^(−1))by 42.54%-101.15%,indicating an underestimation in combustion efficiency in the inventories.DailyΔXCO:ΔXCO_(2)are influenced by transportation governed by weather conditions,except for days in summer when the correlation is low due to the terrestrial biotic activity.By convolving the column footprint[ppm(μmol m-2 s-1)-1]generated by the Weather Research and Forecasting-X-Stochastic Time-Inverted Lagrangian Transport models(WRF-X-STILT)with two fossil-fuel emission inventories(the Multi-resolution Emission Inventory for China(MEIC)and the Peking University(PKU)inventory),the observed enhancements of CO_(2)and CO were used to evaluate the regional emissions.The CO_(2)emissions appear to be underestimated by 11%and 49%for the MEIC and PKU inventories,respectively,while CO emissions were overestimated by MEIC(30%)and PKU(35%)in the Beijing area.

关 键 词：FTS remote sensing ΔXCO:ΔXCO_(2) combustion efficiency MEGACITY 

分 类 号：X51[环境科学与工程—环境工程]