boreal summer

基本解释

The boreal forest needs fire to maintain the ecosystem, and large fires happen regularly in the summer.
北部森林需要火来维持生态系统，所以夏季经常发生森林大火。
During boreal summer, the Asian monsoon region experiences most remarkable changes in the atmospheric thermal condition.
亚洲季风区是全球热力变化最为显著的区域，亚洲夏季风活动必定会对其它环流系统产生影响。
The MJO are stronger in the boreal winter and spring than in the boreal summer and autumn and move southward and northward with season;
它们终年存在，北半球冬春季强、夏秋季弱，且随季节更替作南北向移动；

夏季
The mass transport between the Northern Hemisphere (NH) and the SH is stronger in boreal summer especially in the EH.
就半球间空气质量输送而言，夏季输送强于冬季，东半球强于西半球。