摘要
为了给工农业生产及冻土研究提供依据,利用气候倾向率及相关分析等方法,分析辽西半干旱区冻土持续期、冻土最大深度变化特征以及对气候变暖的响应。结果表明,在气候变暖环境下,冻土封冻始期变化平缓;冻土层化通日期存在提前趋势,近10年比20世纪60年代提前7 d;冻土持续期缩短不明显;冻土最大深度明显变浅,每10年变浅4.1 cm,近10年比20世纪60年代变浅12 cm。气温、地面温度及降水量对冻土最大深度影响显著,冻土最大深度与气温存在线性关系,气温每升高1℃冻土最大深度将变浅5.74 cm。冻土层变浅有利于工农业生产,同时也有利于病虫越冬和界限北移,对防虫防疫不利。
In order to provide the basis for study of the industry and agriculture production, and using climate tendency rate and related analysis, semi-arid area of western Liaoning Province frozen duration, change characteristic of maximum depth and response analysis on climate warming were studied. The results show that： in warming conditions, frozen soil gently changes; permafrost layer through date is ahead of the trend, nearly 10 years was ahead of 7 days than nineteen sixties; frozen shorter duration is not obvious; maximum depth of frozen soil becomes shallow, shallow 4.1 cm every 10 years, nearly 10 years was shallower 12 em than twentieth Century 60. Influence of air temperature, ground temperature and precipitation on the maximum depth of fi＇ozen soil were significant,and linear relationship exists between the maximum depth of frozen soil and temperature, when the temperature increases every 1 ~C frozen soil depth will become shallower 5.74 cm. The frozen soil layer beeoming shallow is conducive to industrial and agricultural production, but also conducive to pests over winter and line northwards, unfavorable to the insect prevention.
出处
《宁夏农林科技》
2013年第3期56-58,共3页
Journal of Ningxia Agriculture and Forestry Science and Technology
基金
辽宁省自然科学基金项目"辽西山区小流域根-土系统抗蚀研究"(20102109)
关键词
气候变暖
冻土
变化特征
辽宁西部
Climate warming
Frozen soil
Variation characteristics
Western Liaoning
