摘要: |
【目的】为了解气候变化背景下陵城地区降水和气温变化规律,高效利用降水资源【方法】采用距平分析、线性倾向估计等方法分析了陵城区1970-2019年的逐月降水和气温资料。【结果】结果表明,该区近50 a平均降水量为554.7 mm,年际间降水量总体呈下降趋势,降水量年际变幅较大,变异系数为30.4%;年内降水主要集中在夏季,春、秋、冬季发生干旱的频率大,夏季降水量占全年总降水量的68.4%;50 a间气温呈现了逐渐上升的趋势,近10 a平均气温比1970-1979年代增加0.92 ℃;年内气温最高的月份为7月,最低的月份为1月,与1970-1999年相比,近20 a春季和3月份的平均气温上升幅度最大,分别为1.06 ℃和1.99 ℃。【结论】研究结果对该区水资源优化配置方案的制定具有重要参考价值。 |
关键词: 降水;气温;气候变化,年际变化;变异系数 |
DOI: |
分类号:P49 |
基金项目: |
|
Analysis on the Variation of Precipitation and Air Temperature in Lingcheng District, Shandong Province from 1970 to 2019 |
GAO Jian-dong
|
Water Conservancy Bureau of Lingcheng district,Shandong Dezhou
|
Abstract: |
【Objective】In order to understand the variation characteristics of precipitation and air temperature in Lingcheng District under the background of climate change as well as make efficient use of precipitation resources, 【Method】the monthly precipitation and air temperature data from 1970 to 2019 in Lingcheng District were analyzed by means of anomaly analysis and linear tendency estimation. 【Result】The results show that the average precipitation in this area in the past 50 years is 554.7mm, the interannual precipitation shows an overall downward trend, and the interannual variation of precipitation is large, with a coefficient of variation of 30.4%. The annual precipitation is mainly concentrated in summer, and the frequency of drought in spring, autumn and winter is high, and the summer precipitation accounts for 68.4% of the total precipitation in the whole year. In the past 50 years, the temperature showed an upward trend year by year, and the average temperature in recent 10 years was 0.92 ℃ higher than that in 1970-1979. The highest temperature was in July and the lowest was in January. Compared with 1970-1999, the average temperature in spring and March increased the most in recent 20 years, which were 1.06 ℃ and 1.99 ℃, respectively. 【Conclusion】The research results have important reference value for the formulation of optimal allocation scheme of water resources in this area. |
Key words: Precipitation; air temperature; climate change; interannual variation; variable coefficient |