近10a新疆乌苏植被覆盖对气候变化的响应
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南京信息工程大学 应用气象学院;中国气象局树木年轮理化研究重点开放实验室,南京信息工程大学 应用气象学院;中国气象局树木年轮理化研究重点开放实验室,南京信息工程大学 应用气象学院,南京信息工程大学 应用气象学院

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X16;

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国家科技支撑计划(2012BAC23B01;2012BAD16B0305),中国沙漠气象科学研究基金(sqj2012006);中国清洁发展机制基金,江苏省研究生培养创新工程基金(SJLX_0389)


Response to climate change of vegetation coverage in Wusu,Xinjiang in recent 10 years
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College of Applied Meteorology,Nanjing University of Information Science and Technology,College of Applied Meteorology,Nanjing University of Information Science and Technology

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    摘要:

    基于MODIS-NDVI遥感数据反演新疆乌苏地区2001-2013年植被覆盖的空间格局和变化规律,并结合研究区同期降水量和气温数据,分析了乌苏天山森林生态区、东南部草原生态区和西北部荒漠生态区植被的年际变化和季节变化对气候变化的响应。结果表明:(1) 从年际变化上看,乌苏13a间NDVI呈现缓慢降低趋势,平均NDVI达到了0.163,乌苏东北部及天山北坡部分NDVI较高,西北荒漠地带和中部精河、车排字、克拉玛依一线较低,空间分布呈现南北两极分化;(2) 年内变化,乌苏NDVI变化曲线呈现单峰型,7-8月达到最高,10月至翌年2月植物枯黄NDVI逐渐降低;(3) 在年际水平上,乌苏植被覆盖与气温降水的相关性不高。但在年内水平上,气候因子对植被生长的影响作用明显,气温与月均NDVI通过0.01的显著性检验,达到0.964。说明年内植被生长更依赖于水热组合的作用,而且温度是影响植物生长最直接的因素之一。

    Abstract:

    Fractional vegetation cover of the Wusu basin was estimated using a dimidiate pixel method based on the MODIS-NDVI data from 2001 to 2013.It analyzed the interannual variation and the season changes affect to the climate changes in the area of the ecological of forest, southeast grassland and northwest desert combining the same period rainfall and temperature in the study area.The results showed that:(1)From the inter annual change of view,Wusu’s NDVI showed a decrease tendency in 13 years,The average NDVI reached 0.163.Northeast of Wusu and the northern slope of Tianshan Mountains have high NDVI.Northwest desert region and the central section of jinghe、chepaizi、kelamayi have low NDVI,the spatial distribution of the North-South polarization;(2)Variation within the year,The curve of NDVI showed a single peak type in Wusu,7-8 months to reach the highest,from October to February the following year plants withered and yellow, NDVI gradually reduced;(3)In the annual level,the correlation between vegetation cover and temperature and precipitation is not high.But in the year level,the effect of climatic factors on the growth of vegetation significantly,air temperature and monthly mean NDVI through 0.01 correlation test,reached 0.964.It said that the growth of vegetation in the year is more dependent on the combination of water and heat effect,and the temperature is one of the most direct factor of plant growth.

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赵建萍,王让会,管延龙,等. 近10a新疆乌苏植被覆盖对气候变化的响应[J]. 科学技术与工程, 2015, 15(10): .
ZHAO jianping,,GUAN yanlong, et al. Response to climate change of vegetation coverage in Wusu, Xinjiang in recent 10 years[J]. Science Technology and Engineering,2015,15(10).

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历史
  • 收稿日期:2014-11-12
  • 最后修改日期:2015-01-04
  • 录用日期:2014-12-29
  • 在线发布日期: 2015-04-07
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