[1]WANG Huan,MEI Zaimei.Spatiotemporal Changes of Evapotranspiration and Their Relationship with Climate Factors in Guizhou Province[J].Research of Soil and Water Conservation,2020,27(05):221-229.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 05
Page number:
221-229
Column:
目次
Public date:
2020-08-20
- Title:
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Spatiotemporal Changes of Evapotranspiration and Their Relationship with Climate Factors in Guizhou Province
- Author(s):
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WANG Huan, MEI Zaimei
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(School of Geography and Environmental Science, Guizhou Normal University, Guiyang 550025, China)
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- Keywords:
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evapotranspiration; spatiotemporal characteristics; climatic factors; MOD16; Guizhou Province
- CLC:
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P426.2
- DOI:
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- Abstract:
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To explore the spatiotemporal characteristics of surface evapotranspiration(ET)and the influence of climate change on these characteristics is of great significance to understand the relationship between climate change and water resources. Based on the data of MOD16A2/ET products and meteorological stations from 2000 to 2014, single correlation, partial correlation and complex correlation analysis were comprehensively used to analyze the spatiotemporal variation characteristics of ET in the study area and their relationship with climate factors. The results show that:(1)the measured ET converted from the observed value of evaporating dish is strongly correlated with MOD16/A2ET(R=0.80), which can meet the needs of ET related research;(2)ET has obvious spatial heterogeneity; from northwest to southeast, ET gradually increases, and ET is negatively correlated with elevation interval;(3)during the study period, the fluctuation of inter-annual variation of ET increases slowly, and the ET shows a periodic unimodal trend and peaks in July;(4)there is a positive correlation between ET and the temperature and precipitation in the whole study area, and the area with a positive correlation with the duration of sunshine in the same period is larger than the area with a negative correlation; precipitation is the climate factor that has the greatest influence on ET variation in Guizhou Province. The driving force analysis shows that the main driving types of ET in Guizhou Province are precipitation-strong-drive and precipitation-drive.