DOI: 10.1175/JCLI-D-17-0576.1
Scopus记录号: 2-s2.0-85049730306
论文题名: Large-scale environmental characteristics of MJOs that strengthen and weaken over the Maritime Continent
作者: Burleyson C.D. ; Hagos S.M. ; Feng Z. ; Kerns B.W. ; Kim D.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 14 起始页码: 5731
结束页码: 5748
语种: 英语
英文关键词: ENSO
; Madden-Julian oscillation
; Maritime Continent
; Sea surface temperature
; Tropical variability
Scopus关键词: Atmospheric temperature
; Importance sampling
; Oceanography
; Submarine geophysics
; Surface properties
; Surface waters
; ENSO
; Madden-Julian oscillation
; Maritime Continent
; Sea surface temperature (SST)
; Tropical variability
; Climatology
; El Nino
; El Nino-Southern Oscillation
; La Nina
; longwave radiation
; Madden-Julian oscillation
; sea surface temperature
; Southern Hemisphere
英文摘要: The characteristics of Madden-Julian oscillation (MJO) events that strengthen and weaken over the Maritime Continent (MC) are examined. The real-time multivariate MJO (RMM) index is used to assess changes in global MJO amplitude over the MC. The MJO weakens at least twice as often as it strengthens over the MC, with weakening MJOs being twice as likely during El Niño compared to La Niña years and the reverse for strengthening events. MJO weakening shows a pronounced seasonal cycle that has not been previously documented. During the Northern Hemisphere (NH) summer and fall the RMM index can strengthen over the MC. MJOs that approach the MC during the NH winter typically weaken according to the RMM index. This seasonal cycle corresponds to whether the MJO crosses the MC primarily north or south of the equator. Because of the seasonal cycle, weakening MJOs are characterized by positive sea surface temperature and moist-static energy anomalies in the Southern Hemisphere (SH) of the MC compared to strengthening events. Analysis of the outgoing longwave radiation (OLR) MJO index (OMI) shows that MJO precipitation weakens when it crosses the MC along the equator. A possible explanation of this based on previous results is that the MJO encounters more landmasses and taller mountains when crossing along the equator or in the SH. The new finding of a seasonal cycle in MJO weakening over the MC highlights the importance of sampling MJOs throughout the year in future field campaigns designed to study MJO-MC interactions. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111458
Appears in Collections: 气候减缓与适应
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作者单位: Pacific Northwest National Laboratory, Richland, WA, United States; University of Washington, Seattle, WA, United States
Recommended Citation:
Burleyson C.D.,Hagos S.M.,Feng Z.,et al. Large-scale environmental characteristics of MJOs that strengthen and weaken over the Maritime Continent[J]. Journal of Climate,2018-01-01,31(14)