DOI: 10.1007/s00382-011-1160-8
Scopus记录号: 2-s2.0-84862991019
论文题名: Understanding and simulating the link between African easterly waves and Atlantic tropical cyclones using a regional climate model: The role of domain size and lateral boundary conditions
作者: Caron L.-P. ; Jones C.G.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2012
卷: 39, 期: 2017-01-02 起始页码: 113
结束页码: 135
语种: 英语
英文关键词: African easterly wave
; Genesis potential index
; Interannual variability
; Lateral boundary conditions
; Regional climate model
; Tropical cyclone
英文摘要: Using a suite of lateral boundary conditions, we investigate the impact of domain size and boundary conditions on the Atlantic tropical cyclone and african easterly Wave activity simulated by a regional climate model. Irrespective of boundary conditions, simulations closest to observed climatology are obtained using a domain covering both the entire tropical Atlantic and northern African region. There is a clear degradation when the high-resolution model domain is diminished to cover only part of the African continent or only the tropical Atlantic. This is found to be the result of biases in the boundary data, which for the smaller domains, have a large impact on TC activity. In this series of simulations, the large-scale Atlantic atmospheric environment appears to be the primary control on simulated TC activity. Weaker wave activity is usually accompanied by a shift in cyclogenesis location, from the MDR to the subtropics. All ERA40-driven integrations manage to capture the observed interannual variability and to reproduce most of the upward trend in tropical cyclone activity observed during that period. When driven by low-resolution global climate model (GCM) integrations, the regional climate model captures interannual variability (albeit with lower correlation coefficients) only if tropical cyclones form in sufficient numbers in the main development region. However, all GCM-driven integrations fail to capture the upward trend in Atlantic tropical cyclone activity. In most integrations, variations in Atlantic tropical cyclone activity appear uncorrelated with variations in African easterly wave activity. © 2011 Springer-Verlag. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/55211
Appears in Collections: 过去全球变化的重建
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作者单位: MISU, Stockholm University, Stockholm, Sweden; CRCMD Network, Université du Québec à Montréal, Montreal, QC, Canada; Rossby Center, Swedish Meterological and Hydrological Institute, Norrköping, Sweden
Recommended Citation:
Caron L.-P.,Jones C.G.. Understanding and simulating the link between African easterly waves and Atlantic tropical cyclones using a regional climate model: The role of domain size and lateral boundary conditions[J]. Climate Dynamics,2012-01-01,39(2017-01-02)