DOI: 10.1002/2016GL070898
论文题名: Convective moisture adjustment time scale as a key factor in regulating model amplitude of the Madden-Julian Oscillation
作者: Jiang X. ; Zhao M. ; Maloney E.D. ; Waliser D.E.
刊名: Geophysical Research Letters
ISSN: 0094-8548
EISSN: 1944-8279
出版年: 2016
卷: 43, 期: 19 起始页码: 10412
结束页码: 10419
语种: 英语
英文关键词: climate models
; convective adjustment time scale
; Madden-Julian Oscillation
; tropical convection
Scopus关键词: Climate models
; Moisture
; Time measurement
; Water vapor
; Convective adjustments
; Madden-Julian oscillation
; Model inter comparisons
; Model representation
; Multi-Model Simulations
; Precipitation anomalies
; Surface precipitation
; Tropical convection
; Climatology
英文摘要: Despite its pronounced impacts on weather extremes worldwide, the Madden-Julian Oscillation (MJO) remains poorly represented in climate models. Here we present findings that point to some necessary ingredients to produce a strong MJO amplitude in a large set of model simulations from a recent model intercomparison project. While surface flux and radiative heating anomalies are considered important for amplifying the MJO, their strength per unit MJO precipitation anomaly is found to be negatively correlated to MJO amplitude across these multimodel simulations. However, model MJO amplitude is found to be closely tied to a model's convective moisture adjustment time scale, a measure of how rapidly precipitation must increase to remove excess column water vapor, or alternately the efficiency of surface precipitation generation per unit column water vapor anomaly. These findings provide critical insights into key model processes for the MJO and pinpoint a direction for improved model representation of the MJO. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84991013871&doi=10.1002%2f2016GL070898&partnerID=40&md5=b42f6f0ec4308fb5221b0691d2b91b09
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9511
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Joint Institute for Regional Earth System Science and Engineering, University of California, Los Angeles, CA, United States
Recommended Citation:
Jiang X.,Zhao M.,Maloney E.D.,et al. Convective moisture adjustment time scale as a key factor in regulating model amplitude of the Madden-Julian Oscillation[J]. Geophysical Research Letters,2016-01-01,43(19).