中国热带、亚热带西部地区热量带的划分

THE DIVISION OF THERMAL BELTS IN THE TROPICAL AND SUB-TROPICAL WESTERN REGIONS IN CHINA

我国热带、亚热带西部地区山多、高原广，垂直地带性的影响，给热量带的划分带来了困难。因为垂直气候都是在该地区纬向气候带的基础上衍生而来的。因此，亚热带西部地区热量带的划分也应以纬向地带性为主，基带气候为中亚热带的云贵高原和金沙江河谷仍应归属于中亚热带。青藏高原破坏了纬向地带性规律，其东侧应有一条亚热带西界，这一界线应是北、中、南亚热带遇到青藏高原后的中断界线，而不是北、中、南亚热带与青藏高寒气候大区的过渡界线。本文提出了西界的划分方法。

There are many mountains and vast plateaus in the western region in China.Owing to the influence of vertical zonality,It is difficult to divide the climatic belts.But the vertical climate is established based on the base vertical climatic belts that have the characters of latitudinal zonality.Therefore,the divided western sub-tropical thermal belts are latitudinal zones.Thereafter,YunnanGuizhou Plateau and Jinsha River Velley should be in the middle sub-tropical zone.The latitudinal zonality is destroyed by the Tibetan Platearu.Therefore,there is a boundary of western sub-tropical zone which is located on the eastern side of the Tibetan Plateau.It is a boundary on the north,the middle and the south of the sub-tropical which runs into the Tibetan Plaleau.But there is not a transitional zone between the sub-tropical belt and the Tibetan Plateau.The method of dividing the western subtropical is advanced in this paper.