CORDEX - An international climate downscaling initiative
CORDEX - An international climate downscaling initiative
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CORDEX - 国际气候降尺度倡议
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发表时间：
2011
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通讯作者：
J. Evans
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作者：
J. Evans
世界气候研究计划（WCRP）正在支持一项名为协调区域气候降尺度实验（CORDEX）的国际倡议。该倡议的目标是为地球仪的大多数陆地地区提供区域缩小尺度的气候预测，作为对第五个耦合模型相互比较项目（CMIP 5）内进行的全球气候模型预测的补充。CORDEX包括动态和统计降尺度数据。预计CORDEX数据集将通过其更好的分辨率和区域重点，提供与影响和适应界的联系。CORDEX的参与是开放的，鼓励任何进行气候降尺度的研究人员参与该倡议。模型评估框架包括使用欧洲中期天气预报中心（ECMWF）ERA中期再分析（Uppala等人，2008年，“完美的边界条件”。将根据区域诊断小组设计和收集的区域数据集，通过一套区域基准统计数据对这些模拟进行评价。CORDEX中的气候预测框架基于目前正在进行的一套新的GCM模拟，以支持IPCC第五次评估报告，称为CMIP 5。CORDEX将侧重于使用被称为RCP4.5和RCP8.5的排放情景进行的大气环流模型实验，这两种情景代表了中等和高水平的排放情景。理想情况下，CORDEX模拟将跨越1951年至2100年，尽管考虑到如此长的瞬态运行的计算需求，一系列30年的时间片也是可能的。每个区域协调机制应对多个大气环流模型进行这些模拟。CORDEX侧重于使用CMIP 5模拟边界条件，这些边界条件仍由GCM小组创建，而NARCliM使用相同的澳大拉西亚和澳大利亚东南部域来缩小CMIP 3模拟的规模。CORDEX和NARCliM数据库的独特之处之一是存在许多三小时字段。这将允许在RCM合奏，以前不可能的昼夜周期的模拟调查。
The World Climate Research Programme (WCRP) is backing an international initiative called the COordinated Regional climate Downscaling EXperiment (CORDEX). The goal of the initiative is to provide regionally downscaled climate projections for most land regions of the globe, as a compliment to the global climate model projections performed within the fifth Coupled Model Intercomparison Project (CMIP5). CORDEX includes data from both dynamical and statistical downscaling. It is anticipated that the CORDEX dataset will provide a link to the impacts and adaptation community through its better resolution and regional focus. Participation in CORDEX is open and any researchers performing climate downscaling are encourage to engage with the initiative. The model evaluation framework consists of RCM simulations performed using the European Centre for Medium-Range Weather Forecasts (ECMWF) ERA-Interim re-analysis (Uppala et al., 2008) as "perfect boundary conditions". These simulations will be evaluated through a set of regional benchmark statistics, against regional datasets, that are designed and assembled by regional diagnostic teams. The climate projection framework within CORDEX is based on the set of new GCM simulations currently underway in support of the IPCC fifth Assessment Report, referred to as CMIP5. CORDEX will focus on the GCM experiments using emission scenarios known as RCP4.5 and RCP8.5 which represent a mid and a high-level emission scenario. Ideally CORDEX simulations will span 1951 to 2100 though given the computational demand of such long transient runs a series of 30 year time slices is also possible. Each RCM should perform these simulations for multiple GCMs. While CORDEX is focused on using CMIP5 simulations for boundary conditions, which are still being created by the GCM groups, NARCliM uses the same AustralAsia and south-east Australia domains to downscale CMIP3 simulations. One of the unique aspects of both the CORDEX and NARCliM databases will be the presence of many three hourly fields. This will allow investigations of the simulation of diurnal cycles in RCM ensembles that have not been previously possible.