Article(id=1315741649523819278, tenantId=1146029695717560320, journalId=1315121910733963395, issueId=1315741514865689424, articleNumber=null, orderNo=null, doi=10.3788/gzxb20265503.0301001, pmid=null, cstr=32255.14.gzxb20265503.0301001, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1756656000000, receivedDateStr=2025-09-01, revisedDate=null, revisedDateStr=null, acceptedDate=1765209600000, acceptedDateStr=2025-12-09, onlineDate=1791626854544, onlineDateStr=2026-10-10, pubDate=1774368000000, pubDateStr=2026-03-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1791626854544, onlineIssueDateStr=2026-10-10, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1791626854544, creator=13701087609, updateTime=1791626854544, updator=13701087609, issue=Issue{id=1315741514865689424, tenantId=1146029695717560320, journalId=1315121910733963395, year='2026', volume='55', issue='3', pageStart='1', pageEnd='378', issueExtLink='null', onlineDate='null', pubDate='1774368000000', pubDateStr='2026-03-25', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1791626822438, creator='13701087609', updateTime=1791626932547, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1315741977111540218, tenantId=1146029695717560320, journalId=1315121910733963395, issueId=1315741514865689424, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1315741977111540219, tenantId=1146029695717560320, journalId=1315121910733963395, issueId=1315741514865689424, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=251, endPage=262, ext={EN=ArticleExt(id=1315741650228462352, articleId=1315741649523819278, tenantId=1146029695717560320, journalId=1315121910733963395, language=EN, title=Study on Column Concentration Variations of CO
2 and CH
4 in Dalian Region Based on Portable Fourier Transform Infrared Spectrometer, columnId=1315741650127799055, journalTitle=Acta Photonica Sinica, columnName=Atmospheric and Oceanic Optics, runingTitle=null, highlight=null, articleAbstract=
Accurate monitoring of atmospheric CO2 and CH4 column concentrations is crucial for understanding greenhouse gas source-sink processes, assessing the effectiveness of emission reduction measures, and formulating climate change mitigation strategies. Fourier Transform Infrared (FTIR) spectroscopy, known for its high spectral resolution and sensitivity, is a key ground-based remote sensing technique. The portable EM27/SUN FTIR spectrometer, developed by KIT and Bruker, features a compact and robust design suitable for long-term field observations. Its core is an interferometer: incoming solar radiation is split, reflected by fixed and moving mirrors, and recombined to generate interference signals. Subsequently, the PREPROCESS program and the PROFFAST retrieval algorithm are applied to retrieve the column concentrations of the target gases.
To further improve the retrieval accuracy and reliability of EM27/SUN, this paper evaluates the reliability of the EM27/SUN by comparing its retrieval results in the Hefei area with those from the TCCON high-resolution FTIR spectrometer. Calibration formulas were developed to optimize the EM27/SUN retrieval performance. After calibration, the daily average deviation of the column-averaged dry-air mole fraction of carbon dioxide (XCO2) between the EM27/SUN and TCCON was 1.259 0 ppm, while that of methane (XCH4) was 0.003 7 ppm. Furthermore, the observation precision of XCO2 and XCH4 was calculated based on continuous observation data from the Dalian observation site during the midday period (11∶00~13∶00) on October 23rd. The observation precision for XCO2 was found to be 0.12 ppm, and for XCH4, it was 0.9 ppb, which meets the precision requirements for ground-based remote sensing of greenhouse gas monitoring.
Using the PROFFAST retrieval algorithm, time series of atmospheric XCO2 and XCH4 were obtained for selected dates in February, March, September, October, and November 2023 in the Dalian Changxing Island region. The mean XCO2 was (422.41±0.34) ppm (parts per million by volume), while the mean XCH4 was (1.915 2±0.001 8) ppm. The observational data were divided into two periods: the late winter to early spring transition period (late February to March) and the mid-to-late autumn period (late September to early November). The mean XCO2 during the late winter to early spring period (422.99 ppm) was higher than that during the mid-to-late autumn period (421.55 ppm). In contrast, XCH4 showed an opposite trend, with a lower mean during the late winter to early spring transition period (1.909 9 ppm) compared to the mid-to-late autumn period (1.923 2 ppm). Although CO2 and CH4 have different source-sink mechanisms, their concentration variations exhibited certain correlations in specific months, implying common influences on their variations. The correlation coefficient was 0.73 in the late winter to early spring period and 0.69 in the mid-to-late autumn period. By analyzing the characteristics of CO2 and CH4 concentration variations during the observation period and combining this with a backward trajectory model, possible source-sink processes were investigated.
Furthermore, a comparison was conducted between the EM27/SUN observation data and the corrected data from the Japanese GOSAT satellite. The results showed high consistency, with correlation coefficients of 0.87 for XCO2 and 0.76 for XCH4, respectively. Additionally, GOSAT satellite data (monthly averages) from December 2021 to November 2024 were analyzed, revealing distinct seasonal variations for both gases: XCO2 peaked in spring and winter and reached its lowest in summer (spring>winter>autumn>summer), whereas XCH4 was lower in spring and higher in summer and autumn (autumn>summer>winter>spring). Both gases exhibited a clear increasing trend over the years. This study provides important data support for greenhouse gas source-sink analysis in the Dalian region. The portable FTIR spectrometer EM27/SUN can accurately observe atmospheric CO2 and CH4 column concentrations and their variations, making it suitable for validating satellite remote sensing data in remote areas.
, authors=Huanhuan SHOU
1, 2, Yuan MENG
1, 2, Jun HUANG
1, Juan ZHU
4, Xingji LU
1, Haodong RU
1, 2, Zhengwei CAO
5, Yinbo HUANG
1, 3, Zhensong CAO
1, authorsList=Huanhuan SHOU, Yuan MENG, Jun HUANG, Juan ZHU, Xingji LU, Haodong RU, Zhengwei CAO, Yinbo HUANG, Zhensong CAO, authorCompany=null, correspAuthors=Xingji LU, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1315741654246605608, articleId=1315741649523819278, tenantId=1146029695717560320, journalId=1315121910733963395, language=CN, title=基于便携式傅里叶变换红外光谱仪研究大连地区CO
2与CH
4柱浓度变化, columnId=1315741650337514257, journalTitle=光子学报, columnName=大气与海洋光学, runingTitle=null, highlight=null, articleAbstract=
为进一步提高便携式傅里叶变换红外光谱仪EM27/SUN对CO2和CH4的柱浓度反演结果的准确性,利用总碳柱观测网络(TCCON)高分辨率傅里叶变换红外光谱仪同步测量数据,提取CO2和CH4浓度的校准公式,并对EM27/SUN进行校准,优化反演结果。校准后,EM27/SUN的测量反演结果与TCCON站点的数据相比,CO2柱平均干空气摩尔分数(XCO2)日平均偏差由1.838 5 ppm降至1.259 0 ppm;CH4柱平均干空气摩尔分数(XCH4)日平均偏差由0.008 2 ppm降为0.003 7 ppm。在此基础上,在大连长兴岛地区开展了CO2和CH4柱浓度的观测,观测期间XCO2的平均值为(422.41±0.34) ppm,XCH4平均值为(1.915 2±0.001 8) ppm。通过分析观测期间XCO2和XCH4的变化特征,并结合后向轨迹模型,探讨了可能的源汇过程。进一步地,将EM27/SUN观测数据与日本GOSAT卫星测量的数据进行相关性分析,结果显示两者具有较高的一致性,XCO2和XCH4的相关系数分别达到0.87和0.76。
, authors=寿欢欢
1, 2, 孟远
1, 2, 黄俊
1, 朱娟
4, 卢兴吉
1, 汝浩东
1, 2, 曹正伟
5, 黄印博
1, 3, 曹振松
1, authorsList=寿欢欢, 孟远, 黄俊, 朱娟, 卢兴吉, 汝浩东, 曹正伟, 黄印博, 曹振松, authorCompany=null, correspAuthors=卢兴吉, authorNote=
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1State Key Laboratory of Laser Interaction with Matter, Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
2University of Science and Technology of China, Hefei 230026, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1315741657522357053, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, authorId=1315741655706223417, language=CN, stringName=寿欢欢, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1中国科学院合肥物质科学研究院安徽光学精密机械研究所,激光与物质相互作用全国重点实验室,合肥 230031
2中国科学技术大学,合肥 230026, bio={"content":"
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1State Key Laboratory of Laser Interaction with Matter, Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China), AuthorCompanyExt(id=1315741654875751211, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, companyId=1315741654716367657, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1中国科学院合肥物质科学研究院安徽光学精密机械研究所,激光与物质相互作用全国重点实验室,合肥 230031)]), AuthorCompany(id=1315741654963831596, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, xref=2, ext=[AuthorCompanyExt(id=1315741654972220205, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, companyId=1315741654963831596, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2University of Science and Technology of China, Hefei 230026, China), AuthorCompanyExt(id=1315741654984803118, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, companyId=1315741654963831596, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2中国科学技术大学,合肥 230026)])]), Author(id=1315741657610437439, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, orderNo=1, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1315741657711100738, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, authorId=1315741657610437439, language=EN, stringName=Yuan MENG, firstName=Yuan, middleName=null, lastName=MENG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, address=
1State Key Laboratory of Laser Interaction with Matter, Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
2University of Science and Technology of China, Hefei 230026, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1315741657803375427, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, authorId=1315741657610437439, language=CN, stringName=孟远, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, address=
1中国科学院合肥物质科学研究院安徽光学精密机械研究所,激光与物质相互作用全国重点实验室,合肥 230031
2中国科学技术大学,合肥 230026, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1315741654716367657, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, xref=1, ext=[AuthorCompanyExt(id=1315741654858973994, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, companyId=1315741654716367657, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1State Key Laboratory of Laser Interaction with Matter, Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China), AuthorCompanyExt(id=1315741654875751211, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, companyId=1315741654716367657, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1中国科学院合肥物质科学研究院安徽光学精密机械研究所,激光与物质相互作用全国重点实验室,合肥 230031)]), AuthorCompany(id=1315741654963831596, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, xref=2, ext=[AuthorCompanyExt(id=1315741654972220205, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, companyId=1315741654963831596, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2University of Science and Technology of China, Hefei 230026, China), AuthorCompanyExt(id=1315741654984803118, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, companyId=1315741654963831596, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2中国科学技术大学,合肥 230026)])]), Author(id=1315741657870484293, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, orderNo=2, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1315741657966953287, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, authorId=1315741657870484293, language=EN, stringName=Jun HUANG, firstName=Jun, middleName=null, lastName=HUANG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, address=
1State Key Laboratory of Laser Interaction with Matter, Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1315741658046645064, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, authorId=1315741657870484293, language=CN, stringName=黄俊, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, address=
1中国科学院合肥物质科学研究院安徽光学精密机械研究所,激光与物质相互作用全国重点实验室,合肥 230031, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1315741654716367657, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, xref=1, ext=[AuthorCompanyExt(id=1315741654858973994, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, companyId=1315741654716367657, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1State Key Laboratory of Laser Interaction with Matter, Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China), AuthorCompanyExt(id=1315741654875751211, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, companyId=1315741654716367657, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1中国科学院合肥物质科学研究院安徽光学精密机械研究所,激光与物质相互作用全国重点实验室,合肥 230031)])]), Author(id=1315741658122142538, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, orderNo=3, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1315741658210222924, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, authorId=1315741658122142538, language=EN, stringName=Juan ZHU, firstName=Juan, middleName=null, lastName=ZHU, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
4, address=
4Mianyang Aerospace Laboratory,Mianyang 621000, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1315741658310886221, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, authorId=1315741658122142538, language=CN, stringName=朱娟, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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4航天绵阳室,绵阳 621000, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1315741655278404402, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, xref=4, ext=[AuthorCompanyExt(id=1315741655299375923, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, companyId=1315741655278404402, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1, address=
1State Key Laboratory of Laser Interaction with Matter, Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1315741658646430546, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, authorId=1315741658386383695, language=CN, stringName=卢兴吉, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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Photograph of the EM27/SUN and its observation sites. (a) Photograph of EM27/SUN; (b) Location site 1(Google Satellite Map); (c) Location site 2(Google Satellite Map), figureFileSmall=F5K17Z7rlZyf1QjuE1yBag==, figureFileBig=ts4fD52kLIFRgohiL9Rzrw==, tableContent=null), ArticleFig(id=1315741662706516857, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, language=CN, label=图1, caption=
EM27/SUN傅立叶变换光谱仪实物图与所在观测站点。(a) 实物图; (b) 站点1(谷歌卫星地图); (c) 站点2(谷歌卫星地图), figureFileSmall=F5K17Z7rlZyf1QjuE1yBag==, figureFileBig=ts4fD52kLIFRgohiL9Rzrw==, tableContent=null), ArticleFig(id=1315741662912037754, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, language=EN, label=Fig.2, caption=
Retrieval flowchart, figureFileSmall=xJDPTddR4wPDBfGdFBSuQQ==, figureFileBig=XuM/L2H195qzKR9Vfz/MhQ==, tableContent=null), ArticleFig(id=1315741663008506747, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, language=CN, label=图2, caption=
反演流程, figureFileSmall=xJDPTddR4wPDBfGdFBSuQQ==, figureFileBig=XuM/L2H195qzKR9Vfz/MhQ==, tableContent=null), ArticleFig(id=1315741663088198524, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, language=EN, label=Fig.3, caption=
Comparison of observed CO2 and CH4 values, figureFileSmall=p/qmvIRU9nrZF1mEGhTY4g==, figureFileBig=lUmeDV72ESm0VLkCMPgj5g==, tableContent=null), ArticleFig(id=1315741663155307389, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, language=CN, label=图3, caption=
XCO2、XCH4观测值对比情况, figureFileSmall=p/qmvIRU9nrZF1mEGhTY4g==, figureFileBig=lUmeDV72ESm0VLkCMPgj5g==, tableContent=null), ArticleFig(id=1315741663239193470, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, language=EN, label=Fig.4, caption=
Correlation coefficient between EM27/SUN and TCCON data, figureFileSmall=ct4VsYydm00BIMEChQURDQ==, figureFileBig=k6xnVxyCsjtJFPF9mxNxIw==, tableContent=null), ArticleFig(id=1315741663310496639, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, language=CN, label=图4, caption=
EM27/SUN数据与TCCON数据的相关系数, figureFileSmall=ct4VsYydm00BIMEChQURDQ==, figureFileBig=k6xnVxyCsjtJFPF9mxNxIw==, tableContent=null), ArticleFig(id=1315741663402771328, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, language=EN, label=Fig.5, caption=
Observation data from 11∶00 to 13∶00 on October 23, 2023, figureFileSmall=yJmC/kj50vf4EGXP69VrAQ==, figureFileBig=y/TUx/nMkzBB/SLF5KIx8A==, tableContent=null), ArticleFig(id=1315741663461491585, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, language=CN, label=图5, caption=
2023年10月23日11∶00-13∶00内的观测数据, figureFileSmall=yJmC/kj50vf4EGXP69VrAQ==, figureFileBig=y/TUx/nMkzBB/SLF5KIx8A==, tableContent=null), ArticleFig(id=1315741663536989058, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, language=EN, label=Fig.6, caption=
Variation of XCO2 during the observation period, figureFileSmall=4+CwmuJQNJYT87vZfZ5chg==, figureFileBig=iNvMVPZcpQPM5qgQw1gX1Q==, tableContent=null), ArticleFig(id=1315741663612486531, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, language=CN, label=图6, caption=
观测期间XCO2的变化, figureFileSmall=4+CwmuJQNJYT87vZfZ5chg==, figureFileBig=iNvMVPZcpQPM5qgQw1gX1Q==, tableContent=null), ArticleFig(id=1315741663683789700, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, language=EN, label=Fig.7, caption=
Variation of XCH4 during the observation period, figureFileSmall=GyN8ow7Ik4h5T6odno7ZZQ==, figureFileBig=jdVGSFp7h21vFXMoAbLtyA==, tableContent=null), ArticleFig(id=1315741663767675781, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, language=CN, label=图7, caption=
观测期间XCH4的变化, figureFileSmall=GyN8ow7Ik4h5T6odno7ZZQ==, figureFileBig=jdVGSFp7h21vFXMoAbLtyA==, tableContent=null), ArticleFig(id=1315741663838978950, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, language=EN, label=Fig.8, caption=
Correlation between XCO2 and XCH4 at the Dalian station, figureFileSmall=f1qWZNqoXrpKBYgpLO6FaA==, figureFileBig=vOJrZ70ND1fzkv6ChutodQ==, tableContent=null), ArticleFig(id=1315741663906087815, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, language=CN, label=图8, caption=
大连站点XCO2与XCH4的相关性, figureFileSmall=f1qWZNqoXrpKBYgpLO6FaA==, figureFileBig=vOJrZ70ND1fzkv6ChutodQ==, tableContent=null), ArticleFig(id=1315741663985779592, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, language=EN, label=Fig.9, caption=
Backward transport trajectories of gas molecules and wind rose diagram. (a) 72-h backward transport trajectories; (b) Wind rose diagram, figureFileSmall=55MJbu3Q7851BqZGfpaZWQ==, figureFileBig=JisII6TcPg1CHc1h2ekO0w==, tableContent=null), ArticleFig(id=1315741664090637193, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, language=CN, label=图9, caption=
气体分子后向输送轨迹与风玫瑰图。(a) 72小时气体分子后向输送轨迹; (b) 风玫瑰图, figureFileSmall=55MJbu3Q7851BqZGfpaZWQ==, figureFileBig=JisII6TcPg1CHc1h2ekO0w==, tableContent=null), ArticleFig(id=1315741664250020746, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, language=EN, label=Fig.10, caption=
Comparative analysis of satellite and ground-based data, figureFileSmall=xjvW7Fi/ys3+2oqPi1177Q==, figureFileBig=lIkQmlYnWXVAVxVbDtvvCg==, tableContent=null), ArticleFig(id=1315741664396821387, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, language=CN, label=图10, caption=
卫星与地基数据对比分析, figureFileSmall=xjvW7Fi/ys3+2oqPi1177Q==, figureFileBig=lIkQmlYnWXVAVxVbDtvvCg==, tableContent=null), ArticleFig(id=1315741664493290380, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, language=EN, label=Fig.11, caption=
GOSAT satellite monthly average CO2 and CH4 column concentrations (2021.12~2024.11), figureFileSmall=uNlMsGuyCEC60m+ly13r3w==, figureFileBig=ZRGjhcR9HTP7yPRFJGynsg==, tableContent=null), ArticleFig(id=1315741664556204941, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, language=CN, label=图11, caption=
GOSAT卫星CO2、CH4的月平均柱浓度变化(2021.12~2024.11), figureFileSmall=uNlMsGuyCEC60m+ly13r3w==, figureFileBig=ZRGjhcR9HTP7yPRFJGynsg==, tableContent=null), ArticleFig(id=1315741664631702414, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, language=EN, label=Table 1, caption=
Comparison of measurement results before calibration
, figureFileSmall=null, figureFileBig=null, tableContent=
| Gas | Mean (EM27/SUN) | Mean (TCCON) | Daily mean bias | R |
|---|
| CO2 | 418.89 ppm (415.49~423.85) | 417.16 ppm (412.40~423.32) | 1.838 5 ppm | 0.77 |
| CH4 | 1.94 ppm (1.91~1.99) | 1.94 ppm (1.92~1.98) | 0.008 2 ppm | 0.91 |
), ArticleFig(id=1315741664698811279, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, language=CN, label=表1, caption=
测量结果对比(校准前)
, figureFileSmall=null, figureFileBig=null, tableContent=
| Gas | Mean (EM27/SUN) | Mean (TCCON) | Daily mean bias | R |
|---|
| CO2 | 418.89 ppm (415.49~423.85) | 417.16 ppm (412.40~423.32) | 1.838 5 ppm | 0.77 |
| CH4 | 1.94 ppm (1.91~1.99) | 1.94 ppm (1.92~1.98) | 0.008 2 ppm | 0.91 |
), ArticleFig(id=1315741664770114448, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, language=EN, label=Table 2, caption=
Daily average deviations before and after calibration
, figureFileSmall=null, figureFileBig=null, tableContent=
| Gas | Correction formula | Daily mean bias (before) | Daily mean bias (after) |
|---|
| CO2 | y=0.918 8x+32.267 6 | 1.838 5 ppm | 1.259 0 ppm |
| CH4 | y=0.624 3x+0.721 12 | 0.008 2 ppm | 0.003 7 ppm |
), ArticleFig(id=1315741666372338577, tenantId=1146029695717560320, journalId=1315121910733963395, articleId=1315741649523819278, language=CN, label=表2, caption=
校准前后的日平均偏差
, figureFileSmall=null, figureFileBig=null, tableContent=
| Gas | Correction formula | Daily mean bias (before) | Daily mean bias (after) |
|---|
| CO2 | y=0.918 8x+32.267 6 | 1.838 5 ppm | 1.259 0 ppm |
| CH4 | y=0.624 3x+0.721 12 | 0.008 2 ppm | 0.003 7 ppm |
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