Analysis on Relationship Between Net Primary Productivity and Evapo-transpiration Based on MODIS Data in Shaanxi Province

WANG Juan; HE Huijuan; ZHUO Jing; DONG Jinfang

doi:10.13961/j.cnki.stbctb.2017.03.045

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Analysis on Relationship Between Net Primary Productivity and Evapo-transpiration Based on MODIS Data in Shaanxi Province

- Analysis on Relationship Between Net Primary Productivity and Evapo-transpiration Based on MODIS Data in Shaanxi Province
- Bulletin of Soiland Water Conservation Vol. 37, Issue 3, Pages: 264-269(2017)
- 作者机构：
  
  陕西省农业遥感信息中心,陕西,西安,710014
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2017.03.045
  CLC：
- Published：2017
- 稿件说明：
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WANG Juan, HE Huijuan, ZHUO Jing, et al. Analysis on Relationship Between Net Primary Productivity and Evapo-transpiration Based on MODIS Data in Shaanxi Province[J]. Bulletin of Soiland Water Conservation, 2017, 37(3): 264-269.
DOI：

WANG Juan, HE Huijuan, ZHUO Jing, et al. Analysis on Relationship Between Net Primary Productivity and Evapo-transpiration Based on MODIS Data in Shaanxi Province[J]. Bulletin of Soiland Water Conservation, 2017, 37(3): 264-269. DOI： 10.13961/j.cnki.stbctb.2017.03.045.

摘要

[目的] 分析陕西省植被净初级生产力（NPP）及实际蒸散量（ET），为生态环境中碳循环、水循环特征提供理论支持。[方法] 基于美国航天局（NASA）提供的净初级生产力产品（MOD17 A3）及蒸散产品（MOD16）数据，利用GIS与数理统计等方法，对陕西省2000-2014年植被NPP与ET的时空分布特征及其关系进行分析。[结果] 陕西省植被NPP与ET的分布特征均为南高北低；2000-2014年陕西省植被NPP在波动中呈现上升趋势，其中陕北地区增加最大，陕南地区增加最不显著；陕西省ET年际变化呈波动状态。植被NPP与ET空间相关性较显著，陕北地区相关系数极高，而陕南地区相关性并不显著。[结论] 在较为干旱区域植被NPP与ET的关系更为密切。

Abstract

[Objective] Analyzing the vegetation net primary productivity(NPP) and the actual evapotranspiration(ET) in Shaanxi Province

to provide theoretical support with regard to carbon cycle

water cycle characteristics of ecological environment.[Methods] Based on data of the NASA products of net primary productivity(MOD17 A3) and evapotranspiration(MOD16)

the spatial and temporal variation characteristics and relationships between NPP and ET in 2000-2014 of Shaanxi Province were analyzed by using the methods of GIS and mathematical statistics.[Results] The vegetation NPP and ET both showed a spatial distribution characteristics by gradually decreasing from the south to the north. In 2000-2014

interannual variability of Shaanxi vegetation NPP presented an increasing trend. The most significant increased region was Shanbei

the second was Guanzhong

and the lowest region was Southern Shaanxi; interannual variability of ET was not significant

and showed a trend of fluctuations. Spatial correlation between NPP and ET was significant for overall province

but regional difference existed:correlation coefficient in Shanbei region was highly significant

whereas in the southern Shaanxi region

it was not significant.[Conclusion] The vegetation NPP had closer relations with ET in arid area.

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references

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