Article(id=1242117530450461151, tenantId=1146029695717560320, journalId=1146031591421210625, issueId=1242116867230339865, 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=1225209600000, receivedDateStr=2008-10-29, revisedDate=1230566400000, revisedDateStr=2008-12-30, acceptedDate=null, acceptedDateStr=null, onlineDate=1233072000000, onlineDateStr=2009-01-28, pubDate=1233072000000, pubDateStr=2009-01-28, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1233072000000, onlineIssueDateStr=2009-01-28, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1774073496684, creator=sys-migrate, updateTime=1774073496684, updator=sys-migrate, issue=Issue{id=1242116867230339865, tenantId=1146029695717560320, journalId=1146031591421210625, year='2009', volume='27', issue='0902', pageStart='3', pageEnd='126', issueExtLink='null', onlineDate='null', pubDate='1233072000000', pubDateStr='2009-01-28', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=3, issueType=-1, specialIssue=null, createTime=1774073338558, creator='sys-migrate', updateTime=1774073338558, updator='sys-migrate', preIssue=null, nextIssue=null, articleTotal=null, ext=null, issueFiles=null, downloadFileDto=null}, startPage=83, endPage=87, ext={EN=ArticleExt(id=1242117533147398643, articleId=1242117530450461151, tenantId=1146029695717560320, journalId=1146031591421210625, language=EN, title=Temporal and Spatial Variations of the Nonlinear Principal Mode of Summer Sea Level Pressure Anomalies over Eurasia, columnId=1242116080374710456, journalTitle=Science & Technology Review, columnName=Articles, runingTitle=null, highlight=null, articleAbstract=Eurasian summer sea level pressure anomalies during 1948-2007 were investigated by applying a Nonlinear Principal Component Analysis (NLPCA) method. The results show that the Eurasian summer sea level pressure anomalies show a distinct nonlinear nature, and the NLPCA can be used to describe more general characteristics of the low-dimension structure of the sea level pressure. The spatial distribution is obviously asymmetrical when the first principal nonlinear component (NLPC1) takes positive or negative values for the anomalies. This nonlinear spatial mode accounts for 47.5% of variance, which is 12.8% higher than that of the first linear principal component(PC1), as very strongly nonlinear. Moreover, the time coefficient of NLPC1 has an uneven oscillation on the time scale of 2～4 years, with the intensity of nonlinear oscillation getting stronger significantly after 1967. These changes are closely linked to the atmosphere internal nonlinear interaction in East Asia, reflecting the spatial and temporal asymmetrical evolutions of the nonlinear low frequency wave for the summer sea level pressure., authors=null, authorsList=null, authorCompany=null, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=QIp1ZCdFaEo95BkJm3/W0Q==, pdfFileSize=1027957, 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=1242117532648276462, articleId=1242117530450461151, tenantId=1146029695717560320, journalId=1146031591421210625, language=CN, title=夏季欧亚海平面气压场主要非线性模态的时空变化, columnId=1146540929516700224, journalTitle=科技导报, columnName=研究论文, runingTitle=null, highlight=null, articleAbstract=用非线性主成分分析方法研究了欧亚地区1948-2007年60年夏季海平面气压距平场主要空间模态的非线性特征。结果表明，夏季欧亚地区海平面气压场异常变率具有显著的非线性特征， 非线性主成分分析法有能力表示出更一般的低维结构特征。当第一非线性主成分取不同异常值时，对应的海平面气压异常空间分布型具有显著的非对称性。其解释方差为47.5%，比线性PCA第一模态高出12.8%，因而非线性较强。同时，第一非线性主成分时间变化表现为不均匀的周期为2～4年的年际振荡，其强度在1967年以后迅速增强。这个主要非线性空间模态与东亚地区大气内部非线性相互作用密切相关，反映了夏季欧亚地区环流非线性低频波活动的时空不对称性。, authors=杨秋明,谢志清,黄世成, authorsList=杨秋明;谢志清;黄世成, authorCompany=江苏省气象科学研究所, correspAuthors=null, authorNote=null, correspAuthorsNote=杨秋明, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=IWaxoWuLpr/hwcC1EG2/HQ==, pdfFileSize=1027957, 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=1242117532191097321, tenantId=1146029695717560320, 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