DOI: 10.1002/2016MS000683
Scopus记录号: 2-s2.0-84990931050
论文题名: Inter-model comparison of subseasonal tropical variability in aquaplanet experiments: Effect of a warm pool
作者: Leroux S ; , Bellon G ; , Roehrig R ; , Caian M ; , Klingaman N ; P ; , Lafore J ; -P ; , Musat I ; , Rio C ; , Tyteca S
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2016
卷: 8, 期: 4 起始页码: 1526
结束页码: 1551
语种: 英语
英文关键词: Climatology
; Tropics
; Aquaplanet
; Convective heating
; Madden-Julian oscillation
; Model comparison
; Spectral characteristics
; State of the art
; Subseasonal variability
; Tropical variability
; Lakes
; atmosphere-ocean coupling
; atmospheric general circulation model
; convective system
; experimental study
; heating
; Madden-Julian oscillation
; model test
; parameterization
; seasonal variation
; tropical meteorology
; warm pool
; westerly
英文摘要: This study compares the simulation of subseasonal tropical variability by a set of six state-of-the-art AGCMs in two experiments in aquaplanet configuration: a zonally symmetric experiment, and an experiment with a warm pool centered on the equator. In all six models, the presence of the warm pool generates zonal asymmetries in the simulated mean states in the form of a “Gill-type” response, made more complex by feedbacks between moisture, convective heating and circulation. Noticeable differences appear from one model to another. Only half the models simulate mean low-level equatorial westerlies over the warm pool area. The presence of the warm pool can also favor the development of large-scale variability consistent with observed Madden-Julian Oscillation (MJO) characteristics, but this happens only in half the models. Our results do not support the idea that the presence of the warm pool and/or of mean low-level equatorial westerlies are sufficient conditions for MJO-like variability to arise in the models. Comparing spectral characteristics of the simulated Convectively Coupled Equatorial Waves (CCEWs) in the aquaplanet experiments and the corresponding coupled atmosphere-ocean (i.e., CMIP) and atmosphere-only (i.e., AMIP) simulations, we also show that there is more consistency for a given model across its configurations, than for a given configuration across the six models. Overall, our results confirm that the simulation of subseasonal variability by given model is significantly influenced by the parameterization of subgrid physical processes (most-likely cloud processes), both directly and through modulation of the mean state. © 2016. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75857
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: CNRM UMR 3589, Météo-France/CNRS, Toulouse, France; Laboratoire de Glaciologie et Géophysique de l'Environnement, LGGE UMR 5183, CNRS/Univ. Grenoble Alpes, Grenoble, France; Department of Physics, University of Auckland, Auckland, New Zealand; SMHI, Norrköping, Sweden; National Centre for Atmospheric Science-Climate and Department of Meteorology, University of Reading, Reading, United Kingdom; Laboratoire de Météorologie Dynamique/IPSL/UPMC/CNRS, France
Recommended Citation:
Leroux S,, Bellon G,, Roehrig R,et al. Inter-model comparison of subseasonal tropical variability in aquaplanet experiments: Effect of a warm pool[J]. Journal of Advances in Modeling Earth Systems,2016-01-01,8(4)