DOI: 10.1175/JCLI-D-14-00767.1
Scopus记录号: 2-s2.0-84942864304
论文题名: Role of longwave cloud-radiation feedback in the simulation of the Madden-Julian oscillation
作者: Kim D. ; Ahn M.-S. ; Kang I.-S. ; Del Genio A.D.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 17 起始页码: 6979
结束页码: 6994
语种: 英语
Scopus关键词: Climate models
; Greenhouses
; Climate model simulations
; Cloud parameterizations
; Cloud-radiation interactions
; Intraseasonal variability
; Long-wave radiation
; Madden-Julian oscillation
; Outgoing longwave radiation
; Statistical relationship
; Climatology
; climate modeling
; cloud radiative forcing
; greenhouse effect
; longwave radiation
; Madden-Julian oscillation
; parameterization
; precipitation (climatology)
; seasonal variation
英文摘要: The role of the cloud-radiation interaction in the simulation of the Madden-Julian oscillation (MJO) is investigated. A special focus is on the enhancement of column-integrated diabatic heating due to the greenhouse effects of clouds and moisture in the region of anomalous convection. The degree of this enhancement, the greenhouse enhancement factor (GEF), is measured at different precipitation anomaly regimes as the negative ratio of anomalous outgoing longwave radiation to anomalous precipitation. Observations show that the GEF varies significantly with precipitation anomaly and with the MJO cycle. The greenhouse enhancement is greater in weak precipitation anomaly regimes and its effectiveness decreases monotonically with increasing precipitation anomaly. The GEF also amplifies locally when convection is strengthened in association with the MJO, especially in the weak precipitation anomaly regime (<5 mm day-1). A robust statistical relationship is found among CMIP5 climate model simulations between the GEF and the MJO simulation fidelity. Models that simulate a stronger MJO also simulate a greater GEF, especially in the weak precipitation anomaly regime (<5 mm day-1). Models with a greater GEF in the strong precipitation anomaly regime (>30 mm day-1) represent a slightly slower MJO propagation speed. Many models that lack the MJO underestimate the GEF in general and in particular in the weak precipitation anomaly regime. The results herein highlight that the cloud-radiation interaction is a crucial process for climate models to correctly represent the MJO. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50764
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; School of Earth and Environmental Sciences, Seoul National University, Seoul, South Korea; NASA Goddard Institute for Space Studies, New York, NY, United States
Recommended Citation:
Kim D.,Ahn M.-S.,Kang I.-S.,et al. Role of longwave cloud-radiation feedback in the simulation of the Madden-Julian oscillation[J]. Journal of Climate,2015-01-01,28(17)