CAJ | 학술논문

为评估和改进模式中不同类型云与降水的对应关系，利用1998—2007年卫星-台站融合降水资料和国际卫星云气候计划的卫星观测云资料，采用诊断方法分析了中国东部季风区冬季层云、夏季对流云、层云与降水的水平分布及季节变化对应关系，并评估了 BCC AGCM 模式的 T42和 T106分辨率版本对云-降水对应关系的模拟能力。观测资料分析结果表明，中国东部冬季云带和雨带都稳定少动，降水主要来自雨层云和高层云，南部沿海层云和层积云也对降水有贡献；夏季，中国东部表现为层积混合云降水特征，对流云带与降水带具有较好的对应关系，并具有一致的移动特征。对流降水主要来自深对流云和卷层云，深对流云云量和降水中心完全吻合，卷层云云带则表现出比深对流云主体和降水带偏北的现象；层云降水主要来自高层云和层积云。模式评估结果表明，中、低分辨率版本的 BCC AGCM 模式均模拟出了冬季层云和稳定少动的降水带、夏季深对流云、卷层云和降水带的对应关系及随季风推进的移动特征。与 T42模式版本相比，T106模式版本在夏季对流云云量的模拟及其与降水带的对应关系方面有所改善，说明改进的 BCC AGCM 积云对流参数化方案与高分辨率模式网格更匹配，但冬季层云云量模拟误差变大，与降水带的对应关系变差，其原因值得进一步分析研究。
위평고화개진모식중불동류형운여강수적대응관계，이용1998—2007년위성-태참융합강수자료화국제위성운기후계화적위성관측운자료，채용진단방법분석료중국동부계풍구동계층운、하계대류운、층운여강수적수평분포급계절변화대응관계，병평고료 BCC AGCM 모식적 T42화 T106분변솔판본대운-강수대응관계적모의능력。관측자료분석결과표명，중국동부동계운대화우대도은정소동，강수주요래자우층운화고층운，남부연해층운화층적운야대강수유공헌；하계，중국동부표현위층적혼합운강수특정，대류운대여강수대구유교호적대응관계，병구유일치적이동특정。대류강수주요래자심대류운화권층운，심대류운운량화강수중심완전문합，권층운운대칙표현출비심대류운주체화강수대편북적현상；층운강수주요래자고층운화층적운。모식평고결과표명，중、저분변솔판본적 BCC AGCM 모식균모의출료동계층운화은정소동적강수대、하계심대류운、권층운화강수대적대응관계급수계풍추진적이동특정。여 T42모식판본상비，T106모식판본재하계대류운운량적모의급기여강수대적대응관계방면유소개선，설명개진적 BCC AGCM 적운대류삼수화방안여고분변솔모식망격경필배，단동계층운운량모의오차변대，여강수대적대응관계변차，기원인치득진일보분석연구。
To evaluate and improve the correlation between the clouds and the precipitation in the models,the relationships of the horizontal distribution and seasonal variation between the various cloud types and the precipitation over eastern China are analyzed,and the model results simulated by T42 and T106 version of BCC AGCM are evaluated respectively by using the ISC-CP cloud data and the merged precipitation data from January 1998 to December 2007.It is found that over eastern China,the winter precipitation demonstrates stratiform features,the cloud belt and rain belt stably maintain near 27°N,and the precipitati-on is mainly resulted from Nimbostratus and Altostratus.On the other hand,the summer precipitation has both convective and stratiform characteristics.The summer convective cloud belt and rain belt move with the summer monsoon consistently.The convective precipitation is mainly resulted from deep convective clouds and Cirrostratus,with their maximum centers matching well with the precipitation regions,but Cirrostratus occurs in the north side of the main body of the deep convection and precip-itation.The summer stratiform precipitation is mainly resulted from Altostratus and Stratocumulus.The model simulations show that BCC AGCM has good skills on the cloud climate modeling.It can reproduce the correct location and stability of the winter stratiform clouds and precipitation,and also can reproduce the consistent evolution of the summer rain belt with deep convective cloud belts.Compared with the T42 model version,the summer precipitation and deep convective clouds,as well as their relationship simulated by T106 model are well improved.However,the winter stratiform clouds,precipitation and their relationship are worse.