中国的地理状况呈现高度的多样化，在东部有山区、平原和河流三角洲，在西部有沙漠、高原和山地。
S.. China's geography is highly diverse, with hills, plains, and river deltas in the east and deserts, high plateaus, and mountains in the west.
与中国东部平原区相比，青藏高原光合有效辐射的相对通量稍低，但其绝对量仍远远高于中国东部平原地区。
Compared with those in the eastern plain of China, the relative flux of par on Tibetan Plateau is a little lower, but the absolute flux of par is far higher.
在37—50 km， 温度出现增加的趋势，青藏高原的增温也比中国东部地区快。
Meanwhile, the temperature below 37 km has decreased over the TP, and it decreased faster over the TP than over the ECHN.
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