The 28-year hindcast experiments (1983 -2010)and the 2013 summer prediction are performed by using regional climate model (RegCM3)which is embedded in the global atmosphere ocean coupled model (BCC CM1.0)whose climatological means are adjusted based on the NCEP-R2 reanalysis datasets.A traditional dynami-cal downscaling (TDD)parallel run by using RegCM3 that is driven by original BCC CM1.0 output is also conduc-ted.The results indicate that after using GCM (Global Climate Model)bias corrected method,the capability of hindcasting multi-year mean summer temperature and precipitation is greatly improved.Compared to TDD ap-proach,although the predictability of temperature anomaly in northeastern China declines,the prediction of sum-mer extreme heat event over the central part of Eastern China in 2013 is remarkably enhanced.The enhanced performance of hindcasting multi-year averaged Western Pacific subtropical high (WPSH)mainly leads to the im-provement of predicting summer extreme heat event in 2013.%使用 NCEP 再分析资料对国家气候中心全球海气耦合模式 BCC CM1．0的多年平均场进行订正，然后嵌套区域气候模式 RegCM3，建立基于边界强迫场订正的区域气候模式系统。使用该系统进行28年夏季回报及2013年夏季业务预测，并与直接使用 BCC CM1．0模式与 RegCM3模式嵌套的模式系统进行对比。结果表明，引入边界强迫场订正技术后，区域气候模式系统对多年平均夏季气温、降水回报能力有了显著提高，且回报的高温界限值分布更接近于观测。除对2013年夏季东北地区气温距平预测效果变差外模式系统对于2013年中国东部中部地区夏季气温距平异常偏高、夏季高温日数异常偏多等观测事实的预测性能有显著提高。区域气候模式系统回报的多年平均夏季西太平洋副热带高压与观测更为接近是其对2013年夏季极端高温事件预测能力提高的关键所在。
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