boreal summer

基本解释

The boreal forest needs fire to maintain the ecosystem, and large fires happen regularly in the summer.
北部森林需要火來維持生態系統，所以夏季經常發生森林大火。
During boreal summer, the Asian monsoon region experiences most remarkable changes in the atmospheric thermal condition.
亞洲季風區是全球熱力變化最爲顯著的區域，亞洲夏季風活動必定會對其它環流系統産生影響。
The MJO are stronger in the boreal winter and spring than in the boreal summer and autumn and move southward and northward with season;
它們終年存在，北半球鼕春季強、夏鞦季弱，且隨季節更替作南北曏移動；

夏季
The mass transport between the Northern Hemisphere (NH) and the SH is stronger in boreal summer especially in the EH.
就半球間空氣質量輸送而言，夏季輸送強於鼕季，東半球強於西半球。