项目名称: 基于模式加权方法的中国未来降水年代际概率预测研究
项目编号: No.41205062
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 大气科学学科
项目作者: 陈威霖
作者单位: 南京信息工程大学
项目金额: 25万元
中文摘要: 项目试图利用模式加权方法对未来10-30年中国区域降水型的变化进行概率预测。为此,将(1) 引入和提出新的适合东亚(中国)季风降水的模式评估标准,科学评估CMIP5耦合模式对该区降水的模拟能力,并分析导致各模式出现差异的物理成因;(2)在此基础上,结合REA和贝叶斯方法,以及申请人自己提出的概率预测方法,对模式进行加权集合,并分析概率预测结果对于等权与加权,以及不同加权方法的敏感性;(3)进一步从大尺度环流场分析降水变化的物理成因。本项目的研究成果将加深对模式评估与应用的科学理解,为我国年代际尺度的降水预测提供线索。
中文关键词: 概率预估;CMIP5;中国;模式评估;
英文摘要: The project seeks to do probabilistic prediction of precipitation over China in the next 10-30 years with the method of model-weighting. For this purpose We will (1) introduced and propose new model-evaluation criteria that suited for East Asia (China) monsoon rainfall, then assess the ability of CMIP5 coupled model in terms of simulating the precipitation over this region. We will also analyze the physical causes of the difference performance of each AOGCM; (2) Base on this, the combination of REA and Bayesian methods, as well as the applicant-proposed probabilistic prediction methods will be used to weight the CMIP5 models. The sensitivity of the probabilistic prediction results to unweighted and weighted methods, as well as to different weighting methods will also be analyzed. Last,(3) The physical causes of the precipitation changes will be further analyzed from changes of the large scale circulation. The results of this project will deepen the scientific understanding of the model evaluation and application, as well as providing clues for the decadal scale precipitation predictions.
英文关键词: Probabilistic projection;CMIP5;China;Model evaluation;