气象资料表明，我国存在30年一周期的冷暖交替，目前我国处在一个偏暖周期内。
Weather data makes clear, the changes in temperature that our country puts in 30 years of one cycle is alternant, at present our country slants at inside warm cycle.
由于河流阶地是间歇性新构造抬升的产物，其形成阶段又与气候的冷暖变化相关，即冷期阶地陡坎形成，暖期阶地堆积物形成。
Because the river terrace is the result of interrupting neotectonic uplift and its forming stages are bound up with the geologic climate cold warm changes, I.
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