Article(id=1242133226521699302, tenantId=1146029695717560320, journalId=1146031591421210625, issueId=1242133213372556217, articleNumber=null, orderNo=7, doi=10.3981/j.issn.1000-7857.2015.06.005, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1423411200000, receivedDateStr=2015-02-09, revisedDate=1424707200000, revisedDateStr=2015-02-24, acceptedDate=null, acceptedDateStr=null, onlineDate=1428653855057, onlineDateStr=2015-04-10, pubDate=1427472000000, pubDateStr=2015-03-28, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1428653855057, onlineIssueDateStr=2015-04-10, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1774077238919, creator=sys-migrate, updateTime=1774077238919, updator=sys-migrate, issue=Issue{id=1242133213372556217, tenantId=1146029695717560320, journalId=1146031591421210625, year='2015', volume='33', issue='6', pageStart='1', pageEnd='128', issueExtLink='null', onlineDate='null', pubDate='1427472000000', pubDateStr='2015-03-28', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=3, issueType=-1, specialIssue=null, createTime=1774077235785, creator='sys-migrate', updateTime=1774077235785, updator='sys-migrate', preIssue=null, nextIssue=null, articleTotal=null, ext=null, issueFiles=null, downloadFileDto=null}, startPage=37, endPage=41, ext={EN=ArticleExt(id=1242133231697473675, articleId=1242133226521699302, tenantId=1146029695717560320, journalId=1146031591421210625, language=EN, title=Characteristics of aerosol scattering coefficient in autumn Xi'an, China, columnId=1242116903087440448, journalTitle=Science & Technology Review, columnName=Spescial Issues, runingTitle=null, highlight=null, articleAbstract=To investigate the impact of PM_2.5 chemical species on light scattering in autumn Xi'an, light scattering coefficient and PM_2.5 samples were collected daily in November 2012 at the Institute of Earth Environment, Chinese Academy of Sciences. The PM_2.5 water-soluble ionic species (Na⁺, NH₄⁺, K⁺, Mg²⁺, Ca²⁺, F^-, Cl^-, NO₃^- and SO₄^2-) and carbonaceous (organic carbon and elemental carbon) were analyzed to characterize their impacts on the light scattering coefficient. The average PM_2.5 during the sampling period was (195.4±83.5) μg·m^-3. The average light scattering coefficient was (579±387) Mm^-1, with high value at night and low value in the daytime. The concentration of PM_2.5 showed a strong correlation with light scattering coefficient, with a correlation coefficient of 0.85. The estimated light scattering efficiency of PM_2.5 was 3.09 m²·g^-1. Among the PM_2.5 chemical species, NH₄⁺, K⁺, SO₄^2- and OC had a strong correlation with light scattering coefficient, suggesting that they are the main contribution sources for light extinction coefficient. The revised IMPROVE equation was used to estimate chemical extinction (b_ext), which was lower than measured bsp, wet. Among the PM_2.5 chemical species, organics had the largest contribution to light extinction, accounting for 52.3%, followed by NH₄NO₃ (16.2%) and (NH₄)₂SO₄ (13.7%)., authors=ZHOU Yaqing^1,2, CAO Junji^1,3, WANG Qiyuan¹, LIU Suixin¹, ZHANG Ting¹, authorsList=ZHOU Yaqing, CAO Junji, WANG Qiyuan, LIU Suixin, ZHANG Ting, authorCompany=1. Key Lab of Aerosol Chemistry & Physics; Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an 710049, China, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=EQQfpeO3M7nv3H4YVBhvRw==, pdfFileSize=884418, 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=1242133230749560961, articleId=1242133226521699302, tenantId=1146029695717560320, journalId=1146031591421210625, language=CN, title=西安市秋季大气颗粒物散射特征及其影响因素, columnId=1242116902361830275, journalTitle=科技导报, columnName=专题论文, runingTitle=null, highlight=null, articleAbstract=为研究污染条件下西安市秋季大气颗粒物的散射特征及其影响因素, 于2012 年11 月监测大气颗粒物散射系数并采集PM_2.5样品。探讨了大气颗粒物的散射日变化特征, 通过实验分析PM_2.5中水溶性离子(Na⁺、NH₄⁺、K⁺、Mg²⁺、Ca²⁺、F^-、Cl^-、NO₃^-和SO₄^2-)和含碳物质(有机碳和元素碳)的污染水平, 并讨论它们的来源及对散射系数的影响。结果表明, 颗粒物的散射系数均值为(579±387)Mm^-1, 夜间高日间低。PM_2.5质量浓度与散射系数呈现出较强的线性关系(相关系数为0.85), 通过回归方程得到PM_2.5散射效率为3.09 m²·g^-1。在PM_2.5化学组分中, 有机物对消光系数的贡献最大, 占52.3%;其次是NH₄NO₃和(NH₄)₂SO₄, 贡献率分别为16.2%和13.7%。, authors=周雅清^1,2, 曹军骥^1,3, 王启元¹, 刘随心¹, 张婷¹, authorsList=周雅清, 曹军骥, 王启元, 刘随心, 张婷, authorCompany=1. 中国科学院地球环境研究所气溶胶化学与物理重点实验室, 西安710061;
2. 中国科学院大学, 北京100049;
3. 西安交通大学全球环境变化研究院, 西安710049, correspAuthors=null, authorNote=周雅清,硕士研究生,研究方向为PM_2.5污染及其光学特征,电子信箱zhouyq@ieecas.cn, correspAuthorsNote=曹军骥,研究员,研究方向为气溶胶与环境、PM_2.5研究与控制,电子信箱:cao@loess.llqg.ac.cn, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=mwpy0F7tS/hvWHVyV1tuJA==, pdfFileSize=884418, 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)}, authors=null, keywords=[Keyword(id=1242133230363684988, tenantId=1146029695717560320, journalId=1146031591421210625, articleId=1242133226521699302, language=CN, orderNo=1, keyword=散射系数), Keyword(id=1242133230447571069, tenantId=1146029695717560320, journalId=1146031591421210625, articleId=1242133226521699302, language=CN, orderNo=1, keyword=PM_2.5化学组分), Keyword(id=1242133230531457149, 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