不同土地覆盖类型上植被生长的最适温度
Optimum Temperature of Vegetation Growth for Various Land Cover Types in China
查看参考文献23篇
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文摘
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生态过程模型已成为探测陆地植被对气候变化响应的重要手段之一,最适温度作为模型模拟过程中的一个重要参数,其准确性对模型模拟结果有重要影响。本研究以2001-2010年MODIS-NDVI、2001-2010年气象台站温度数据,以及2000年土地覆盖数据,结合前人研究的成果,将最适温度定义为适宜植物生长温度上下限之间所有月均温度的均值,并从植被类型角度出发,探讨不同植物生长的最适温度,以期为生态过程模型的改进提供参数优化方案。研究表明,不同植被类型植被生长的最适温度存在较大差异。常绿针叶林、常绿阔叶林、落叶针叶林、落叶阔叶林、混交林、灌丛、草地、农田和建设用地的最适温度,依次为22.4℃、23.4℃、14.1℃、19.5℃、20.7℃、22.6℃、15.4℃、24.8℃和25.6℃。 |
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其他语种文摘
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Ecological model basing on process is an important method to explore questions of climate change which have been a hot topics concerned by scientists. However, the accuracy of a model is key to the accuracy of simulation results. As an important process parameter, the accuracy of optimum temperature to the simulation re-sults has noteworthy influence in the model. In this study, MODIS-NDVI from 2001 to 2010, daily mean tem-perature from 2001 to 2010 and land cover in 2000 were adopted to extract optimum temperature of vegetation growth for various land cover types in China. In combination with the existing researches, the optimum tempera-ture in this study was defined as all the monthly mean temperature within bounds of suitable temperature for veg-etation growth, according to that, generally speaking, plant grow well at the range of suitable temperature. Based on the definition, we explored the optimum temperature of different vegetation types from the perspective of land cover. After analyzing the correlation between corresponding NDVI and temperature for different vegeta-tion types, the optimum temperature of different vegetation types, which could be used to advance parameters op-timization scheme for ecological process model, were acquired by overlay analysis from NDVI, temperature and land cover based on the above analysis. The results from this study showed that a significant difference in terms of optimum temperature existed in different vegetation types. The optimum temperature of vegetation types mainly distributed in northern China and Qinghai-Tibet Plateau, the value of which are generally lower than 20℃, are lower than that of vegetation types in southern China. The optimum temperature of evergreen conifer-ous forest, evergreen broad-leaved forest, deciduous coniferous forest, deciduous broad-leaved forest, mixed for-est, shrub, grassland, crop and residents land were 22.4℃, 23.4℃, 14.1℃, 19.5℃, 20.7℃, 22.6℃, 15.4℃, 24.8℃ and 25.6℃ respectively. |
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来源
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地球信息科学学报
,2014,16(1):1-1 【核心库】
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关键词
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生态模型
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MODIS
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NDVI
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最适温度
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植被类型
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地址
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中国科学院地理科学与资源研究所, 北京, 100101
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1560-8999 |
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学科
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自然地理学;自动化技术、计算机技术 |
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基金
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国家973计划
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文献收藏号
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CSCD:5037524
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