EN中文

JOURNAL OF NATURAL RESOURCES >

2007 , Vol. 22 >Issue 2: 260 - 267

DOI: https://doi.org/10.11849/zrzyxb.2007.02.013

Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS

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

Expand
  • 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 date: 2006-03-23

  Revised date: 2006-12-11

  Online published: 2007-04-25

Fold

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

Cite this article

WANG Yi-rong . Climate Evolvement of Water-heat and the Response of Soil Moisture in Grassland Area of the Upper Yellow River[J]. JOURNAL OF NATURAL RESOURCES, 2007 , 22(2) : 260 -267 . DOI: 10.11849/zrzyxb.2007.02.013

Options
Outlines

/

〈 〉