1982-2006年中国5-9月的NDVI变化与人类活动影响分析

发布时间：2018-06-24 00:39

本文选题：NDVI + 突变　；参考：《地球信息科学学报》2015年11期

【摘要】：植被是联系陆地、大气和生态系统的自然纽带,其随着气候和人类活动而发生变化,因此,研究它的突变和变化趋势具有重要意义。本文利用3年滑动t检验、Mann-Kendall检验(MK检验)和距平分析法,研究了中国1982-2006年5-9月平均的NDVI(NOAA/AVHRR GIMMS)突变和变化趋势及其主要原因。3年滑动t检验和MK检验表明,1998年华东地区的NDVI出现了突变,而东北地区和青藏高原NDVI没有出现突变。NDVI变化趋势的分析表明,1982-1998年华东地区NDVI为较平稳的趋势,1998年出现突变后,1998-2006年转为明显下降的趋势(以1998年为转折点)。因此,华东地区NDVI存在明显的变化趋势。NDVI突变和变化趋势的成因分析表明,20世纪90年代后期至21世纪初,随着华东地区大规模的城市化建设和房地产的过度开发,导致耕地面积减少,华东地区植被1998年出现了突变,并从偏多转为明显偏少的趋势,而卫星仪器和气候因子并非是导致该地植被出现突变和变化趋势的主要原因。
[Abstract]:Vegetation is a natural link between land, atmosphere and ecosystem, which changes with climate and human activities. Therefore, it is of great significance to study its mutation and trend. In this paper, we use 3-year sliding t test Mann-Kendall test (MK test) and anomaly analysis method. The mutation and variation trend of NDVI (NOAA / AVHRR GIMMS) in China from May to September, 1982-2006, and its main reasons are studied. The results of 3-year sliding t test and MK test show that the NDVI in East China appeared mutation in 1998. The analysis of NDVI in Northeast China and Qinghai-Xizang Plateau shows that NDVI changed steadily from 1982 to 1998, and the NDVI changed obviously from 1998 to 2006 (taking 1998 as the turning point). Therefore, the analysis of NDVI mutation and its cause of formation in East China shows that from the late 1990s to the beginning of the 21st century, with the large-scale urbanization and overdevelopment of real estate in East China, As a result of the decrease of cultivated land area, there was a sudden change of vegetation in East China in 1998, which changed from more to less obviously. Satellite instruments and climatic factors were not the main reasons for the abrupt change of vegetation in this area.
【作者单位】：国家卫星气象中心;
【基金】：卫星遥感全球下垫面类型数据集(GYHY201106014) 公益性行业(气象)科研专项经费项目“青藏高原遥感积雪气候数据集建设(GYHY201206040)”
【分类号】：Q948.123

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