地理科学 ›› 1999, Vol. 19 ›› Issue (3): 220-224.doi: 10.13249/j.cnki.sgs.1999.03.220

• 论文 • 上一篇    下一篇

松嫩草地40余年气温、降水变化及其若干影响研究

邓慧平1, 刘厚凤2, 祝廷成3   

  1. 1. 安徽师范大学地理系, 芜湖241000;
    2. 山东师范大学地理系, 济南250014;
    3. 东北师范大学草地研究所, 长春130024
  • 收稿日期:1998-06-22 修回日期:1998-11-10 出版日期:1999-05-20 发布日期:1999-05-20
  • 基金资助:
    国家教委草原生态建设项目支持(国家教委科技司[1996]146号重点项目)

TEMPERATURE AND PRECIPITATION CHANGES OVER SONGNEN STEPPE AND THEIR IMPACTS SINCE MID 20TH CENTURY

Deng Huiping1, Liu Houfeng2, Zhu Tingcheng3   

  1. 1. Department of Geography, Anhui Normal University, Wuhu 241000;
    2. Department of Geography, Shandong Normal University, Jinan 250014;
    3. Institute of Grassland, Northeast Normal University, Changchun 130024
  • Received:1998-06-22 Revised:1998-11-10 Online:1999-05-20 Published:1999-05-20

摘要: 分析了松嫩草地40余年气温、降水的变化,评估了这些变化对土壤水分及草地生产力的影响。继而根据大气环流模式CO2倍增“平衡试验”结果评估了未来大气CO2加倍条件下降水、气温的变化对松嫩草地土壤水分及草地生产力可能产生的影响。

Abstract: In this paper, temperature changes and precipitation fluctuations over Songnen Steppe since are analyzed 1953. Based on a soil water balance model and a climate yield empirical model, the impacts of recent forty years and future changes of temperature and precipitation on soil water and grassland productivity are estimated. Over forty years, winter and spring temperature have increased by 2.0℃ or so; autumn and annual temperature have increased about 1.0℃; summer temperature increased by 0.2℃. There is not a trend in precipitation changes. The impacts of temperature increase since 1953 on soil water and grass yield are small, the changes of soil water and grass yield are mainly dependent on precipitation changes. In CO2 doubling situation, according to GISS and GFDL GCMS outputs, temperature will increase by 3-6℃ and precipitation increase about 10% over Songnen Steppe. Such changes in temperature and precipitation will result in soil water decrease every month, while evapotranspiration will increase during rain season. Grass yield will decrease by 3%-4%.

中图分类号: 

  • P49