东北地区夏季低温的气候分析及其对农业生产的影响

本文分析了1881年以来东北地区夏季气温,得到了东北夏季严重低温在空间尺度和时间尺度上都是一种很大尺度的现象。长春5—9月的平均气温和可以很好地代表东北地区的冷暖。东北夏季气温有明显的阶段性,即有明显的110年长周期和3年左右的短周期。东北夏季低温会造成农业严重减产,气温低的地方危害更大,低温冷害年水稻减产最大,其次是高粱。

THE CLIMATIC ANALYSIS OF LOW TEMPERATURE IN SUMMER OVER THE NORTHEAST CHINA AND INFLUENCE FOR AGRICULTURAL PRODUCT

In this paper, the summer temperature over the Northeast China, 1881-1978, have been examined by climatic analysis. It is obtained that the heavy low temperature in summer over the Northeast China is a kind of very large scale phenomenon for space and time. The sum of monthly mean temperature for May-September in Changchun may well represent the cold and warm summer over the Northeast China districts. The summer temperature over the Northeast China has obvious stages, it has llo-yr. long period and 3-yr. period. Tf the summer temperature over the Northeast China is low, the heavy damage of agricultural product will be happened. At the cold weather damage year, the heavest damage is done to. growing rice, while sorghum is the next.