DOI: 10.1175/JCLI-D-15-0349.1
Scopus记录号: 2-s2.0-84957831476
论文题名: Moist process biases in simulations of the Madden-Julian oscillation episodes observed during the AMIE/DYNAMO field campaign
作者: Hagos S.M. ; Feng Z. ; Burleyson C.D. ; Zhao C. ; Martini M.N. ; Berg L.K.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 3 起始页码: 1091
结束页码: 1107
语种: 英语
Scopus关键词: Atmospheric radiation
; Parameterization
; Precipitation (meteorology)
; Wind
; Wind effects
; Cloud parameterizations
; Cloud resolving model
; Convective parameterization
; Deep convection
; Madden-Julian oscillation
; Climatology
; atmospheric circulation
; atmospheric convection
; atmospheric modeling
; atmospheric moisture
; cloud cover
; evaporation
; Madden-Julian oscillation
; radiative forcing
; wind velocity
; Indian Ocean
; Indian Ocean (Tropical)
英文摘要: Two Madden-Julian oscillation (MJO) episodes observed during the 2011 Atmospheric Radiation Measurement ProgramMJO InvestigationExperiment (AMIE)/DYNAMOfield campaign are simulated using a regional model with various cumulus parameterizations, a regional cloud-permitting model, and a global variableresolution model with a high-resolution region centered over the tropical Indian Ocean. Model biases in relationships relevant to existing instability theories of MJO are examined and their relative contributions to the overall model errors are quantified using a linear statistical model. The model simulations capture the observed approximately log-linear relationship between moisture saturation fraction and precipitation, but precipitation associated with the given saturation fraction is overestimated especially at low saturation fraction values. This bias is amajor contributor to the excessive precipitation during the suppressed phase of MJO. After accounting for this bias using a linear statisticalmodel, the spatial and temporal structures of themodel-simulatedMJOepisodes are much improved, and what remains of the biases is strongly correlated with biases in saturation fraction. The excess precipitation bias during the suppressed phase of the MJO episodes is accompanied by excessive columnintegrated radiative forcing and surface evaporation.Alarge portion of the bias in evaporation is related to biases in wind speed, which are correlated with those of precipitation. These findings suggest that the precipitation bias sustains itself at least partly by cloud radiative feedbacks and convection-surface wind interactions. © 2016 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50311
Appears in Collections: 气候变化事实与影响
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作者单位: Pacific Northwest National Laboratory, Richland, WA, United States; Naval Research Laboratory, Monterey, CA, United States
Recommended Citation:
Hagos S.M.,Feng Z.,Burleyson C.D.,et al. Moist process biases in simulations of the Madden-Julian oscillation episodes observed during the AMIE/DYNAMO field campaign[J]. Journal of Climate,2016-01-01,29(3)