The diurnal cycle of precipitation over the Maritime Continent in a high-resolution atmospheric model
Love, BS; Matthews, AJ; Lister, GMS; b.love@uea.ac.uk
2011
发表期刊QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY
ISSN0035-9009
卷号137期号:657页码:934-947
摘要Climate models can exhibit systematic errors in their mean precipitation over the Maritime Continent of the Indonesian archipelago at the heart of the tropical warm pool. These can often be traced back to an erroneous simulation of the diurnal cycle, and can lead to errors in global climate, through planetary wave propagation. Here, we examine the simulation of the diurnal cycle over the Maritime Continent in a series of high-resolution integrations of the UK Met Office atmospheric model, with horizontal resolutions of 40 and 12 km (where the convection is parametrised) and 4 km (where the convection is explicitly resolved), as part of the Cascade project. In these models, the vertical heating profile over the islands changes from a convective profile with a mid-tropospheric maximum in the early afternoon to a more stratiform profile with upper-tropospheric heating and mid-tropospheric cooling later. The convective heating profile forces a first internal mode gravity wave that propagates rapidly offshore; the deep warm anomalies behind its downwelling wavefront suppress convection offshore during early afternoon. The stratiform heating profile forces a gravity wave with a higher-order vertical mode that propagates slowly offshore later in the afternoon. This mode has a negative, destabilising temperature anomaly in the mid-troposphere. Together with the convergence zone between the wave fronts of the two modes, favourable conditions are created for offshore convection. In the 4 km explicit convection model, the offshore convection responds strongly to this gravity wave forcing, in agreement with observations, supporting a gravity wave-convection paradigm for the diurnal cycle over the Maritime Continent. However, the convective response in the lower-resolution models is much less coherent, leading to errors in the diurnal cycle and mean precipitation. Hence, to improve climate model simulations, sensitivity to gravity wave forcing should be a factor in future convective parametrisation schemes. Copyright (C) 2011 Royal Meteorological Society
部门归属[Love, Barnaby S.; Matthews, Adrian J.] Univ E Anglia, Sch Environm Sci, Norwich NR4 7TJ, Norfolk, England; [Matthews, Adrian J.] Univ E Anglia, Sch Math, Norwich NR4 7TJ, Norfolk, England; [Lister, Grenville M. S.] Univ Reading, Natl Ctr Atmospher Sci, Reading RG6 2AH, Berks, England
关键词Gravity Wave Sea Breeze Cascade Project Unified Model
学科领域Meteorology & Atmospheric Sciences
URL查看原文
收录类别sci
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/8375
专题海洋科技动态信息-印太暖池系统研究
通讯作者b.love@uea.ac.uk
推荐引用方式
GB/T 7714
Love, BS,Matthews, AJ,Lister, GMS,et al. The diurnal cycle of precipitation over the Maritime Continent in a high-resolution atmospheric model[J]. QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY,2011,137(657):934-947.
APA Love, BS,Matthews, AJ,Lister, GMS,&b.love@uea.ac.uk.(2011).The diurnal cycle of precipitation over the Maritime Continent in a high-resolution atmospheric model.QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY,137(657),934-947.
MLA Love, BS,et al."The diurnal cycle of precipitation over the Maritime Continent in a high-resolution atmospheric model".QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY 137.657(2011):934-947.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
The diurnal cycle of(1585KB) 开放获取--请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。