<codeBook xmlns="ddi:codebook:2_5" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="ddi:codebook:2_5 https://ddialliance.org/Specification/DDI-Codebook/2.5/XMLSchema/codebook.xsd" version="2.5"><docDscr><citation><titlStmt><titl>Replication Data for: Airborne Observation of CO2 and CH4 in the Urban Atmospheric Boundary Layer in Eastern China</titl><IDNo agency="DOI">doi:10.7910/DVN/ZPVSVU</IDNo></titlStmt><distStmt><distrbtr source="archive">Harvard Dataverse</distrbtr><distDate>2026-02-12</distDate></distStmt><verStmt source="archive"><version date="2026-02-12" type="RELEASED">1</version></verStmt><biblCit>Jun, Wang; Honghui, Xu; Wei, Xiao; Yuting, Pang; Ning, Hu; Jiaping, Xu; Yibo, Liu; Lingbing, Bu; Chang, Cao; Zhonghao, Yang; Tianhao, Wang; Lei, Jia; Jinhui, Wu; Mi, Zhang; Xuhui, Lee, 2026, "Replication Data for: Airborne Observation of CO2 and CH4 in the Urban Atmospheric Boundary Layer in Eastern China", https://doi.org/10.7910/DVN/ZPVSVU, Harvard Dataverse, V1</biblCit></citation></docDscr><stdyDscr><citation><titlStmt><titl>Replication Data for: Airborne Observation of CO2 and CH4 in the Urban Atmospheric Boundary Layer in Eastern China</titl><IDNo agency="DOI">doi:10.7910/DVN/ZPVSVU</IDNo></titlStmt><rspStmt><AuthEnty affiliation="Yale-NUIST Center on Atmospheric Environment, State Key laboratory of Climate System Prediction and Risk Management, Nanjing University of Information Science &amp; Technology">Jun, Wang</AuthEnty><AuthEnty affiliation="Zhejiang Lin'an Atmospheric Background National Observation and Research Station, Zhejiang Institute of Meteorological Sciences">Honghui, Xu</AuthEnty><AuthEnty affiliation="Yale-NUIST Center on Atmospheric Environment, State Key laboratory of Climate System Prediction and Risk Management, Nanjing University of Information Science &amp; Technology">Wei, Xiao</AuthEnty><AuthEnty affiliation="Zhejiang Lin'an Atmospheric Background National Observation and Research Station, Zhejiang Institute of Meteorological Sciences">Yuting, Pang</AuthEnty><AuthEnty affiliation="Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science &amp; Technology">Ning, Hu</AuthEnty><AuthEnty affiliation="Jiangsu Climate Center, Nanjing">Jiaping, Xu</AuthEnty><AuthEnty affiliation="Key Laboratory of Ecosystem Carbon Source and Sink, China Meteorological Administration, Nanjing University of Information Science and Technology">Yibo, Liu</AuthEnty><AuthEnty affiliation="Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science &amp; Technology">Lingbing, Bu</AuthEnty><AuthEnty affiliation="Yale-NUIST Center on Atmospheric Environment, State Key laboratory of Climate System Prediction and Risk Management, Nanjing University of Information Science &amp; Technology">Chang, Cao</AuthEnty><AuthEnty affiliation="Yale-NUIST Center on Atmospheric Environment, State Key laboratory of Climate System Prediction and Risk Management, Nanjing University of Information Science &amp; Technology">Zhonghao, Yang</AuthEnty><AuthEnty affiliation="Yale-NUIST Center on Atmospheric Environment, State Key laboratory of Climate System Prediction and Risk Management, Nanjing University of Information Science &amp; Technology">Tianhao, Wang</AuthEnty><AuthEnty affiliation="Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science &amp; Technology">Lei, Jia</AuthEnty><AuthEnty affiliation="Yale-NUIST Center on Atmospheric Environment, State Key laboratory of Climate System Prediction and Risk Management, Nanjing University of Information Science &amp; Technology">Jinhui, Wu</AuthEnty><AuthEnty affiliation="Yale-NUIST Center on Atmospheric Environment, State Key laboratory of Climate System Prediction and Risk Management, Nanjing University of Information Science &amp; Technology">Mi, Zhang</AuthEnty><AuthEnty affiliation="School of the Environment, Yale University">Xuhui, Lee</AuthEnty></rspStmt><prodStmt/><distStmt><distrbtr source="archive">Harvard Dataverse</distrbtr><contact affiliation="Yale-NUIST Center on Atmospheric Environment, State Key laboratory of Climate System Prediction and Risk Management, Nanjing University of Information Science &amp; Technology" email="20211108003@nuist.edu.cn">Jun, Wang</contact><contact affiliation="Yale-NUIST Center on Atmospheric Environment, State Key laboratory of Climate System Prediction and Risk Management, Nanjing University of Information Science &amp; Technology" email="wei.xiao@nuist.edu.cn">Wei, Xiao</contact><depositr>Jun, Wang</depositr><depDate>2026-02-10</depDate></distStmt><holdings URI="https://doi.org/10.7910/DVN/ZPVSVU"/></citation><stdyInfo><subject><keyword xml:lang="en">Earth and Environmental Sciences</keyword></subject><abstract date="2026-02-10">This dataset contains airborne vertical profile measurements of atmospheric CO&lt;sub>2 &lt;/sub> and CH&lt;sub>4&lt;/sub> concentrations over four cities in Eastern China: Beijing, Nanjing, Hengshui, and Shangqiu. The dataset includes full vertical profiles (from ground level to 2 km) over Beijing and Nanjing, as well as partial profiles over Hengshiu and Shangqiu. Data were collected on 14 May, 2023, with the primary objective of characterizing the vertical distribution of CO&lt;sub>2&lt;/sub> and CH&lt;sub>4&lt;/sub> within the urban atmospheric boundary layer.</abstract><sumDscr/></stdyInfo><method><dataColl><sources/></dataColl><anlyInfo/></method><dataAccs><setAvail/><useStmt/><notes type="DVN:TOU" level="dv">&lt;a href="http://creativecommons.org/publicdomain/zero/1.0">CC0 1.0&lt;/a></notes></dataAccs><othrStdyMat/></stdyDscr><otherMat ID="f13448851" URI="https://dataverse.harvard.edu/api/access/datafile/13448851" level="datafile"><labl>F4_5min_average.xlsx</labl><txt>Data for Figure 4.</txt><notes level="file" type="DATAVERSE:CONTENTTYPE" subject="Content/MIME Type">application/vnd.openxmlformats-officedocument.spreadsheetml.sheet</notes></otherMat><otherMat ID="f13448853" URI="https://dataverse.harvard.edu/api/access/datafile/13448853" level="datafile"><labl>F5_verticle_data.xlsx</labl><txt>Data for Figure 5.</txt><notes level="file" type="DATAVERSE:CONTENTTYPE" subject="Content/MIME Type">application/vnd.openxmlformats-officedocument.spreadsheetml.sheet</notes></otherMat><otherMat ID="f13448855" URI="https://dataverse.harvard.edu/api/access/datafile/13448855" level="datafile"><labl>F6_HSSQ_DOWN.xlsx</labl><txt>Data for Figure 6.</txt><notes level="file" type="DATAVERSE:CONTENTTYPE" subject="Content/MIME Type">application/vnd.openxmlformats-officedocument.spreadsheetml.sheet</notes></otherMat><otherMat ID="f13448854" URI="https://dataverse.harvard.edu/api/access/datafile/13448854" level="datafile"><labl>North_trip.xlsx</labl><notes level="file" type="DATAVERSE:CONTENTTYPE" subject="Content/MIME Type">application/vnd.openxmlformats-officedocument.spreadsheetml.sheet</notes></otherMat><otherMat ID="f13455823" URI="https://dataverse.harvard.edu/api/access/datafile/13455823" level="datafile"><labl>readme.txt</labl><notes level="file" type="DATAVERSE:CONTENTTYPE" subject="Content/MIME Type">text/plain</notes></otherMat><otherMat ID="f13448852" URI="https://dataverse.harvard.edu/api/access/datafile/13448852" level="datafile"><labl>South_trip.xlsx</labl><notes level="file" type="DATAVERSE:CONTENTTYPE" subject="Content/MIME Type">application/vnd.openxmlformats-officedocument.spreadsheetml.sheet</notes></otherMat></codeBook>