吉林中部平原区浅层地下水温度对全球气候变暖的响应

Impact of Global Warming on the Groundwater Temperature of Shallow Aquifer in the Plain Area of Central Jilin Province

水温变化除引起水的多种物理性质的变化外,还会引起水化学反应速度等方面的变化.以吉林中部平原地区为例,对影响浅层地下水温因素的分析发现,研究区浅层地下水温变化的本质原因是受全球气候变化的影响,降水量的减少以及地下水位的下降对浅层地下水温受气候变化的影响起到削减作用.通过对全区近200眼地下浅层观测井水温的多年变化分析,发现在研究区气温近20 a来升高(约1.5℃)的影响下,浅层地下水温从1978年的7℃左右上升到2001年的8.3℃,在20余年间水温升高约1.

The physical and chemical characteristics of water and the speed of water reaction can change with the changing water temperature. Taking the plain area of central Jilin Province as an example, the change of air temperature is a governing factor to the temperature variation in shallow groundwater, the function of which is cut down by the precipitation decrease and groundwater table decline.The perennial change of groundwater temperature of two hundred shallow groundwater observation wells in the plain area of central Jilin is analyzed systemically. The results show that under the circumstance of 1.5 ℃ increase of global temperature in the recent twenty years, the temperature of shallow groundwater in the plain area will increase 1.3℃, from 7 ℃ in 1978 to 8.3 ℃ in 2001.