[1]QIU Kuanbiao,CHENG Junfeng.Vegetation Water Use Efficiency and Its Relationship with Climate in Shaanxi Province[J].Research of Soil and Water Conservation,2015,22(06):256-260.
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Vegetation Water Use Efficiency and Its Relationship with Climate in Shaanxi Province
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
22
Number of periods:
2015 06
Page number:
256-260
Column:
Public date:
2015-12-28
- Title:
- Vegetation Water Use Efficiency and Its Relationship with Climate in Shaanxi Province
- Keywords:
- ecology; water use efficiency; vegetation type; Shaanxi
- CLC:
- Q948
- DOI:
- -
- Abstract:
- Water use efficiency (WUE) is one of the most important variables linking the carbon with hydrological cycle. In this paper we used the MODIS data products including the MODIS-GPP (MOD17A3), MODIS-ET (MOD16A3) and the land cover (MOD12) to analyze the tempo-spatial characteristics of WUE in Shaanxi Province. Results showed that the annual average WUE was the highest in the middle plain, while the lowest in the northern plateau. WUE in crop land was the highest among various vegetation types (1.59 g/(m2·mm), while WUE in shrub and grassland was the lowest. The relationship between WUE and climate depended on the regions. The positive relationship between WUE and precipitation was found in the regions with precipitation less than 627 mm, the similar relationship of WUE with temperature was found in the regions with annual average temperature less than 11℃. During the period from 2002 to 2012, WUE showed an increasing trend, regardless of insignificant increasing for forest (p > 0.05). The regions with significant relationship between WUE and precipitation were mainly dominated by cropland and grassland, while the areas with insignificant relationship between WUE and temperature were dominated by forest.
- References:
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