自然资源学报

自然资源学报 ›› 2007, Vol. 22 ›› Issue (2): 260-267.doi: 10.11849/zrzyxb.2007.02.013

• 气候变化 • 上一篇    下一篇

黄河上游牧草区水热变化及土壤水分响应

王毅荣   

  1. 1. 中国气象局兰州干旱气象研究所甘肃省干旱气候变化与减灾重点实验室中国气象局干旱气候变化与减灾重点开放实验室, 兰州 730020;
    2. 兰州区域气候中心, 兰州 730020
  • 收稿日期:2006-03-23 修回日期:2006-12-11 出版日期:2007-04-25 发布日期:2007-04-25
  • 作者简介:王毅荣(1967-),男,甘肃定西市人,高级工程师,学士,主要从事天气气候变化研究和计算机软件工程研究。E-mail:wcrice@163.com
  • 基金资助:

    科技部社会公益研究专项(2004DIB5J196、2005DIB3J100);国家自然科学基金(40675066)

Climate Evolvement of Water-heat and the Response of Soil Moisture in Grassland Area of the Upper Yellow River

WANG Yi-rong   

  1. 1. Key Laboratory of Arid Climate Change and Reducing Disaster of Gansu Province, Key Laboratory of Arid Climate Change and Reducing Disaster of China Meteorological Administration, Lanzhou Institute of Arid Meteorology, China Meteorological Administration, Lanzhou 730020, China;
    2. Lanzhou Reginal Climate Center, Lanzhou 730020, China
  • Received:2006-03-23 Revised:2006-12-11 Online:2007-04-25 Published:2007-04-25

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被引次数

33

摘要： 利用月降水、气温等资料,分析甘南草原地区水热配置和土壤水分变化。结果表明:牧草生长期降水增多,成熟期降水减少;逐月降水、气温变化的线性趋势有明显差异;月降水明显减少和气温明显上升中存在突变,周期谱有明显差别。土壤水分存在显著下降趋势,在1995年发生了突变(转向明显负距平)。土壤水分年际演变与降水同向性较好,年代际变化与气温呈反位相配置;土壤水分演变振荡周期对降水短周期和气温长周期响应明显。

关键词: 响应, 黄河上游牧草区, 降水气温, 演变, 土壤水分

Abstract: This paper mainly analyzes water-heat distribution and soil water variations in grassland area of southern Gansu by applying the EOF(empirical orthogonal function) and wavelet analysis.The results show there were jump-points in the evolvement of monthly rainfall and soil-water decreasing,and monthly temperature rise.The slopes of rainfall and temperature were different.The variation rate of monthly rainfall was-13.6mm/10a-4.3mm/10a and that of temperature,0.883℃/10a-0.108℃/10a.The obvious correlations of rainfall and temperature with soil water during growth periods were observed.Also the variation evolvement of rainfall and temperature corresponded with weak 4-year variation period.The change of soil water had good relations with annual rainfall and inter-decadal temperature variations.The oscillation of soil water responded obviously on short rainfall periods and long temperature periods.

Key words: grassland area in the upper Yellow River, rainfall and temperature, evolvement, soil water, response

中图分类号: 

  • S152.7