Article(id=1314917476891194276, tenantId=1146029695717560320, journalId=1234093305789726721, issueId=1314917454552327005, articleNumber=null, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1734451200000, receivedDateStr=2024-12-18, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1791430356476, onlineDateStr=2026-10-08, pubDate=1752940800000, pubDateStr=2025-07-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1791430356476, onlineIssueDateStr=2026-10-08, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1791430356476, creator=13701087609, updateTime=1791430356476, updator=13701087609, issue=Issue{id=1314917454552327005, tenantId=1146029695717560320, journalId=1234093305789726721, year='2025', volume='45', issue='7', pageStart='3553', pageEnd='4144', issueExtLink='null', onlineDate='null', pubDate='1752940800000', pubDateStr='2025-07-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1791430351150, creator='13701087609', updateTime=1791431931754, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1314924084186669335, tenantId=1146029695717560320, journalId=1234093305789726721, issueId=1314917454552327005, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1314924084186669336, tenantId=1146029695717560320, journalId=1234093305789726721, issueId=1314917454552327005, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=3644, endPage=3653, ext={EN=ArticleExt(id=1314917477126075301, articleId=1314917476891194276, tenantId=1146029695717560320, journalId=1234093305789726721, language=EN, title=A comparative study of the coverage and spatiotemporal variations of three satellite-based XCO₂ products over China, columnId=1234106386020365051, journalTitle=China Environmental Science, columnName=Air Pollution Control, runingTitle=null, highlight=null, articleAbstract=

This study systematically analyzes and compares the spatiotemporal coverage and distribution patterns of the Level-2 atmospheric column CO₂ concentration (XCO₂) products from OCO-3, OCO-2, and GOSAT satellites over China. The results showed that the annual average spatial coverage of the Level-2 XCO₂ products in China were 43.38%, 21.19% and 0.40% for OCO-3, OCO-2, and GOSAT, respectively, with corresponding monthly average coverages were 4.77%, 2.43% and 0.16%. Notably, OCO-3 exhibited a significant lower monthly average coverage in odd-numbered months (2.23%) compared to even-numbered months (7.31%). There were significant spatial distribution differences in the coverage of the three satellite products. The coverage of OCO-2 and OCO-3 in southern and central China was significantly lower than that in northeastern, northwestern and northern China. In contrast, GOSAT's observations were extremely sparse, mainly concentrated in eastern China. In addition, OCO-3 identified over 20 hotspot observation areas over provincial capitals and industrial cities, which showed markedly higher coverage and observation frequency. From 2019 to 2022, all three satellite XCO₂ products reveal consistent increasing trends in annual average XCO₂, albeit with declining annual increment. Seasonal pattern showed consistently higher XCO₂ in spring and winter than in summer and autumn. Spatially, annual average XCO₂ showed higher concentrations in the eastern than western China, and in southern than northern China. However, the location of XCO₂ extreme value varied across satellites, and significant differences in XCO₂ concentrations were observed among different products within the same sub-region.

, authors=Chen YAN¹, Lu SHE^{1, *}, Tao HUANG², Da-wei MA², Dan WU², Zi-xian FENG¹, Hong-hong ZHAO¹, authorsList=Chen YAN, Lu SHE, Tao HUANG, Da-wei MA, Dan WU, Zi-xian FENG, Hong-hong ZHAO, authorCompany=null, correspAuthors=Lu SHE, 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=1314917477667140518, articleId=1314917476891194276, tenantId=1146029695717560320, journalId=1234093305789726721, language=CN, title=卫星XCO₂产品覆盖度及时空变化比较, columnId=1234106388364981004, journalTitle=中国环境科学, columnName=大气污染与控制, runingTitle=null, highlight=null, articleAbstract=

系统分析了OCO-3、OCO-2以及GOSAT卫星的大气CO₂柱浓度（XCO₂）二级产品在中国的时空覆盖度及分布规律，并进行了综合比较．结果表明：OCO-3、OCO-2及GOSAT的二级XCO₂产品在中国的年均空间覆盖度分别为43.38%，21.19%，0.40%，月均覆盖度分别为4.77%，2.43%，0.16%，且OCO-3月均覆盖度呈现显著的奇数月低，偶数月高的特点，奇数月覆盖度为2.23%，偶数月则高达7.31%；3个卫星产品的覆盖度呈现显著的空间分布差异，OCO-2和OCO-3在华南和华中地区的覆盖度显著低于东北，西北和华北地区，GOSAT在研究区的观测极为稀疏，主要集中在东部地区，OCO-3在省会，工业城市等区域形成20余个热点观测区域，表现出显著高的覆盖度和观测频次；2019~2022年间，3个卫星产品的年均XCO₂呈现一致的增加趋势，但年增量显著下降，3个产品都表现出春冬季XCO₂显著高于夏秋季的季节性规律；XCO₂年均值呈现东部高于西部，南部高于北部的空间分布特征，但不同卫星得到的XCO₂极值子区域不同，且同一子区域不同产品的XCO₂值也表现出显著差异．

, authors=闫琛¹, 佘璐^{1, *}, 黄涛², 马大为², 武丹², 冯自贤¹, 赵红红¹, authorsList=闫琛, 佘璐, 黄涛, 马大为, 武丹, 冯自贤, 赵红红, authorCompany=null, correspAuthors=佘璐, authorNote=, correspAuthorsNote=, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=yG/13xRO3nwF+6TpzPjMhQ==, magXml=CLSMFyUxVSnheYy5VRl09g==, pdfUrl=null, pdf=zJEWg/Mxr+hxXFVX/WyNPg==, pdfFileSize=3401045, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=xRSolijT6ryjAeeQjF5/6w==, mapNumber=null, fund=null)}, authors=[Author(id=1314917478065599406, tenantId=1146029695717560320, journalId=1234093305789726721, articleId=1314917476891194276, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=12023130983@nxu.edu.cn, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1314917478132708272, tenantId=1146029695717560320, journalId=1234093305789726721, articleId=1314917476891194276, authorId=1314917478065599406, language=EN, stringName=Chen YAN, firstName=Chen, middleName=null, lastName=YAN, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=¹, address=^1.School of Geography and Planing, Ningxia University, Yinchuan 750021, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1314917478199817137, tenantId=1146029695717560320, journalId=1234093305789726721, articleId=1314917476891194276, authorId=1314917478065599406, language=CN, stringName=闫琛, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=¹, address=^1.宁夏大学地理科学与规划学院，宁夏 银川 750021, bio={"content":"

闫琛（2001-），女，宁夏银川人，宁夏大学硕士研究生，主要从事大气CO₂卫星遥感研究．12023130983@nxu.edu.cn.

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闫琛（2001-），女，宁夏银川人，宁夏大学硕士研究生，主要从事大气CO₂卫星遥感研究．12023130983@nxu.edu.cn.

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