DOI: 10.1175/JCLI-D-17-0526.1
Scopus记录号: 2-s2.0-85050246905
论文题名: Assessing the relationship between MJO and equatorial Pacific WWBs in observations and CMIP5 models
作者: Feng J. ; Lian T.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 16 起始页码: 6393
结束页码: 6410
语种: 英语
英文关键词: Model comparison
; Model evaluation/performance
; Wind bursts
Scopus关键词: Climate models
; Oceanography
; Surface waters
; Wind stress
; Equatorial Pacific
; Favorable conditions
; Madden-Julian oscillation
; Model comparison
; Model evaluation/performance
; Null hypothesis
; Sea surface temperature anomalies
; Westerly wind bursts
; Climatology
; air-sea interaction
; climate modeling
; CMIP
; comparative study
; Madden-Julian oscillation
; sea surface temperature
; temperature anomaly
; westerly
; Pacific Ocean
; Pacific Ocean (Equatorial)
; Pacific Ocean (Tropical)
英文摘要: This study evaluates the relationship between the Madden-Julian oscillation (MJO) and the occurrence of equatorial Pacific westerly wind bursts (WWBs). During the convective MJO phase, anomalous surface westerlies prevail in and west of the convective MJO center, providing favorable conditions for WWBs. Compared with the probability of WWBs expected under a null hypothesis that WWBs occur randomly, the convective MJO phase almost doubles the probability of a WWB occurring. Nevertheless, only 34.46% of WWBs co-occur with the convective MJO, which is much less than that reported in previous studies. We show that when the MJO and WWBs are defined using the same field with overlapping frequencies, the percentage of WWBs co-occurring with the convective MJO shows a significant increase. However, the higher percentage is simply caused by the fact that the strong WWBs during a convective MJO are more likely to be identified than those during the suppressed and neutral MJO phases. A total of 45.80% of WWBs are found to occur in the full MJO phase (both the convective and suppressed MJO phases), which is slightly higher than that expected based on randomness. Although the full MJO has statistically significant impact on the likelihood of WWBs, the influence from the full MJO on the tropical Pacific sea surface temperature anomaly is much weaker as compared to that from the WWBs. The relationships between the MJO and WWBs simulated in CMIP5 models are also assessed, and the percentage of WWBs that co-occur with the MJO simulated in models is in general less than that in observations. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111437
Appears in Collections: 气候减缓与适应
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作者单位: State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Hangzhou, China
Recommended Citation:
Feng J.,Lian T.. Assessing the relationship between MJO and equatorial Pacific WWBs in observations and CMIP5 models[J]. Journal of Climate,2018-01-01,31(16)