Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-16-0660.1 |
Boreal Summer Intraseasonal Phases Identified by Nonlinear Multivariate Empirical Orthogonal Function-Based Self-Organizing Map (ESOM) Analysis | |
Chu, Jung-Eun1,2; Wang, Bin3,4,5; Lee, June-Yi2; Ha, Kyung-Ja6,7 | |
2017-05-01 | |
发表期刊 | JOURNAL OF CLIMATE
![]() |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2017 |
卷号 | 30期号:10 |
文章类型 | Article |
语种 | 英语 |
国家 | South Korea; USA; Peoples R China |
英文摘要 | This study develops an empirical orthogonal function (EOF)-based self-organizing map (SOM) (ESOM) analysis to identify the nonlinear characteristics of the boreal summer intraseasonal oscillation (BSISO), which involves interactions between the summer mean circulation and the convectively coupled equatorial waves, which make BSISO evolution more complex than the Madden-Julian oscillation. The method utilizes the first five principal components of the outgoing longwave radiation (OLR) and the zonal wind at 850 hPa (U850) and has the advantages of filtering out uncertainties from noise and being free from mathematical restrictions, such as orthogonality and linearity. The ESOM analysis enables the detection of BSISO over the Asian summer monsoon region with eight phases. The four most distinguishable phases represent 1) a pair of stationary patterns with a dipole between the eastern Indian Ocean and the Philippine Sea (phases 1 and 5) and 2) a pair of propagating patterns with a northwest-southeast-tilted rain belt structure (phases 3 and 7). Phases 1 and 5 show an alternating seesaw oscillation throughout the summer with a 30-60-day period, whereas phases 3 and 7 peak in mid-June and early June denoting the monsoon rainy season and premonsoon period of Asian summer monsoon. ESOM captures that phases 1 and 5 happen more frequently and last longer than phases 3 and 7, whereas multivariate EOF analysis fails to describe this nonlinear occurrence. Phases 3 and phase 7 display distinct asymmetries in convective activity over the eastern Indian Ocean related to the relatively slow-growing and fast-decaying convective activity. The relationship with large-scale SST forcing is also discussed. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000399680600003 |
WOS关键词 | OSCILLATION ; MONSOON ; VARIABILITY ; CONVECTION ; RAINFALL ; ONSET ; ENSO |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/21270 |
专题 | 气候变化 |
作者单位 | 1.Pusan Natl Univ, Div Earth Environm Syst, Coll Nat Sci, Busan, South Korea; 2.Pusan Natl Univ, Res Ctr Climate Sci, Busan, South Korea; 3.Univ Hawaii Manoa, Int Pacific Res Ctr, Honolulu, HI 96822 USA; 4.Univ Hawaii Manoa, Dept Meteorol, Honolulu, HI 96822 USA; 5.Nanjing Univ Informat Sci & Technol, Earth Syst Modeling Ctr, Nanjing, Jiangsu, Peoples R China; 6.Pusan Natl Univ, Div Earth Environm Syst, Coll Nat Sci, Res Ctr Climate Sci, Busan, South Korea; 7.Pusan Natl Univ, Dept Atmospher Sci, Busan, South Korea |
推荐引用方式 GB/T 7714 | Chu, Jung-Eun,Wang, Bin,Lee, June-Yi,et al. Boreal Summer Intraseasonal Phases Identified by Nonlinear Multivariate Empirical Orthogonal Function-Based Self-Organizing Map (ESOM) Analysis[J]. JOURNAL OF CLIMATE,2017,30(10). |
APA | Chu, Jung-Eun,Wang, Bin,Lee, June-Yi,&Ha, Kyung-Ja.(2017).Boreal Summer Intraseasonal Phases Identified by Nonlinear Multivariate Empirical Orthogonal Function-Based Self-Organizing Map (ESOM) Analysis.JOURNAL OF CLIMATE,30(10). |
MLA | Chu, Jung-Eun,et al."Boreal Summer Intraseasonal Phases Identified by Nonlinear Multivariate Empirical Orthogonal Function-Based Self-Organizing Map (ESOM) Analysis".JOURNAL OF CLIMATE 30.10(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论