北京不同区域气溶胶辐射效应

采用大气辐射传输模式SES2以及2013年1月—2015年10月欧洲中期天气预报中心细网格再分析资料计算了北京地区4个观测站地面接收的短波辐射通量,分析了晴天和云天北京城郊气溶胶对总辐射的定量影响时空变化特征。结果表明:北京城区和近郊区气溶胶对总辐射的影响约为远郊区的2倍,北京南部和西部气溶胶对辐射的影响较大,晴天和云天北京城区和近郊区气溶胶对总辐射的削减值分别为146.23～180.99 W·m^(-2)和202.11～217.02 W·m^(-2),晴天总辐射削减空间差异较大;秋冬季气溶胶对总辐射的影响明显大于春夏季,北京市观象台秋冬季气溶胶对总辐射的削减作用最大可达60%,较春夏季高10%～20%;北京城郊总辐射和直接辐射削减率与气溶胶光学厚度变化均呈线性关系,近地面PM_(2.5)浓度对辐射的影响不容忽视。

Present State And Development Tendency of Research On Modern Theory of Sports Trainology

To different extents and the threeaspects of sports training principle,event group training theory and specif ic event training theory,the modern theory of sports training has achieved development and gradually formed, the theory system of competitive sports together with the learnings of sports ta1ents indentificaion,sports competition,and management of copetitive sports. The researches on the training of competitive ability, the process of sports training and the social factors affecting training competition has developed in depth, with some new reseach focuses having come into being. A wide,deep involvement of modern science and technology into the development of theory and prac tice of sports training has become an importannt phenomenon and a significant tendency.