DOI: 10.1002/2014MS000324
Scopus记录号: 2-s2.0-84937199156
论文题名: The NOW regional coupled model: Application to the tropical Indian Ocean climate and tropical cyclone activity
作者: Samson G ; , Masson S ; , Lengaigne M ; , Keerthi M ; G ; , Vialard J ; , Pous S ; , Madec G ; , Jourdain N ; C ; , Jullien S ; , Menkes C ; , Marchesiello P
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2015
卷: 6, 期: 3 起始页码: 700
结束页码: 722
语种: 英语
英文关键词: Atmospheric pressure
; Atmospheric thermodynamics
; Climatology
; Clouds
; Hurricanes
; Natural convection
; Oceanography
; Rain
; Storms
; Time measurement
; Tropics
; Atmospheric convection
; Indian ocean
; IOD
; Regional climate modeling
; Tropical cyclone
; Climate models
; atmosphere-ocean coupling
; atmospheric convection
; climate modeling
; cumulus
; El Nino
; El Nino-Southern Oscillation
; Indian Ocean Dipole
; numerical model
; parameterization
; precipitation intensity
; regional climate
; sensitivity analysis
; spatiotemporal analysis
; surface wind
; temporal variation
; tropical cyclone
; tropical region
; Indian Ocean
英文摘要: This paper presents the NOW regional coupled ocean-atmosphere model built from the NEMO ocean and WRF atmospheric numerical models. This model is applied to the tropical Indian Ocean, with the oceanic and atmospheric components sharing a common °horizontal grid. Long experiments are performed over the 1990-2009 period using the Betts-Miller-Janjic (BMJ) and Kain-Fritsch (KF) cumulus parameterizations. Both simulations produce a realistic distribution of seasonal rainfall and a realistic northward seasonal migration of monsoon rainfall over the Indian subcontinent. At subseasonal time scales, the model reasonably reproduces summer monsoon active and break phases, although with underestimated rainfall and surface wind signals. Its relatively high resolution results in realistic spatial and seasonal distributions of tropical cyclones, but it fails to reproduce the strongest observed cyclone categories. At interannual time scales, the model reproduces the observed variability associated with the Indian Ocean Dipole (IOD) and the delayed basin-wide warming/cooling induced by the El Niño Southern Oscillation (ENSO). The timing of IOD occurrence in the model generally matches that of the observed events, confirming the influence of ENSO on the IOD development (through the effect of lateral boundary conditions in our simulations). Although the KF and BMJ simulations share a lot in common, KF strongly overestimates rainfall at all time scales. KF also overestimates the number of simulated cyclones by a factor two, while simulating stronger events (up to 55 m s-1) compared to BMJ (up to 40 m s-1). These results could be related to an overly active cumulus parameterization in KF. Key Points Application of a new coupled regional climate model to the tropical Indian Ocean Sensitivity to convection schemes from intraseasonal to interannual time scales Role of ENSO for triggering the Indian Ocean Dipole © 2014. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/76020
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: LOCEAN LaboratorySorbonne Universités (UPMCm, Univ Paris 06)-CNRS-IRD-MNHNIPSL, IPSL, Paris, France; Laboratoire d'Etudes en Géophysique et Océanographie Spatiales, IRD/CNES/CNRS/UPS, Toulouses, France; Indo-French Cell for Water Sciences, IISc-NIO-IITM-IRD Joint International Laboratory, NIO, Goa, India; LMI ICEMASA, IRD, Department of Oceanography, University of Cape Town, Cape Town, South Africa; Laboratoire de Glaciologie et Géophysique de l'Environnement, CNRS, Grenoble, France; Climate Change Research Centre, University of New South Wales, Sydney, Australia
Recommended Citation:
Samson G,, Masson S,, Lengaigne M,et al. The NOW regional coupled model: Application to the tropical Indian Ocean climate and tropical cyclone activity[J]. Journal of Advances in Modeling Earth Systems,2015-01-01,6(3)