DOI: 10.1175/JCLI-D-16-0393.1
Scopus记录号: 2-s2.0-85014006618
论文题名: Monsoon gyres of the northwest pacific: Influences of ENSO, the MJO, and the Pacific-Japan pattern
作者: Molinari J. ; Vollaro D.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 5 起始页码: 1765
结束页码: 1777
语种: 英语
Scopus关键词: Atmospheric temperature
; Heat flux
; Nickel
; Oceanography
; Surface waters
; 850-hPa
; Large amplitude
; Most likely
; Objective definition
; Real time
; Sea surface temperature (SST)
; Surface latent heat fluxes
; Tangential wind
; Atmospheric thermodynamics
; convection
; El Nino-Southern Oscillation
; gyre
; La Nina
; latent heat flux
; Madden-Julian oscillation
; monsoon
; Japan
; Pacific Ocean
; Pacific Ocean (Northwest)
英文摘要: An objective definition of monsoon gyres in the northwest Pacific was developed in order to construct a gyre climatology. Over a 31-yr period, 53 gyres were identified with a median formation location at 16.5°N, 135°E. More than 80% formed during July-September. More than half of gyres developed during El Niño periods at a median location 1200 km farther to the east-southeast than during La Niña. Cyclonic winds at 850 hPa extended across a diameter of more than 4000 km, with maximum tangential wind near the 1000-km radius.A precipitation maximum extended westward for several thousand kilometers south of the gyre. Typhoons were most common north and east of the gyre centers. More than 70% of gyres developed during large-amplitude MJO events, with a strong preference for Real-time Multivariate MJO (RMM) phases 5-7. In boreal summer these phases contain circulation and convective anomalies that coincide most closely with those of the climatological monsoon trough. Gyres are most likely to form when an active, large-amplitude MJO event superposes with the monsoon trough in the presence of high sea surface temperature. Gyres exhibited 850- hPa wind, height, and vorticity anomalies and surface latent heat flux anomalies that closely resembled the active Pacific-Japan pattern (PJP). This was especially true during La Niña, even though no attempt was made to isolate the PJP. It is hypothesized that an active MJO modulates gyre formation, and the gyres project onto the active phase of the PJP as they move westward. © 2017 American Meteorological Society. 资助项目: NSF, National Science Foundation
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49767
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Department of Atmospheric and Environmental Sciences, University at Albany, State University of New York, Albany, NY, United States
Recommended Citation:
Molinari J.,Vollaro D.. Monsoon gyres of the northwest pacific: Influences of ENSO, the MJO, and the Pacific-Japan pattern[J]. Journal of Climate,2017-01-01,30(5)