Spatial-temporal characteristics of NPP based on processed model from 2002 to 2010 in Gansu Province, Northwest China

2012 IEEE International Geoscience and Remote Sensing Symposium Pub Date : 2012-11-12 DOI:10.1109/IGARSS.2012.6352743

Peijuan Wang, D. Xie, E. Youhao, Yanyan Xu

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Abstract

It is a complex ecological structure with grassland, forest and agriculture in arid and semi-arid regions in Northwest China. It is important for understanding and evaluating ecological efficiency to study net primary productivity of vegetation in Northwest China. In this paper, Gansu Province was selected in Northwest China to study vegetation NPP based on adjusted boreal ecosystem productivity simulator (A-BEPS) model in arid and semi-arid regions. Net primary productivity of vegetation was simulated in Gansu Province from the year of 2002 to 2010 with moderate resolution remote sensing imageries and meteorological data. And then, spatial-temporal distribution patterns of average NPP were analyzed in Gansu Province from the year of 2002 to 2010. The results show that it is high in the south and low in the north for spatial distribution, and obviously seasonal characteristics are got in Gansu Province. Finally, the trends of averaged NPP for three vegetation types and relative meteorological factors were analyzed for the past nine years. The results of a little decreasing NPP and precipitation are got for Gansu province.

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基于处理模型的2002 - 2010年甘肃省NPP时空特征

它是中国西北干旱半干旱区一个集草地、森林、农业为一体的复杂生态结构。研究西北地区植被净初级生产力对认识和评价生态效率具有重要意义。本文以甘肃省为研究对象，基于A-BEPS (adjusted northern ecosystem productivity simulator)模型，对干旱半干旱区植被NPP进行了研究。利用中分辨率遥感影像和气象资料，模拟了2002 ~ 2010年甘肃省植被净初级生产力。在此基础上，分析了2002 - 2010年甘肃省平均NPP的时空分布格局。结果表明:在空间分布上，甘肃省具有南高北低的特点，且具有明显的季节特征。最后，分析了近9年来3种植被类型和相关气象因子的平均NPP变化趋势。结果表明，甘肃省的NPP和降水量略有减少。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2012 IEEE International Geoscience and Remote Sensing Symposium

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