Journal of Geo-information Science >
Optimum Temperature of Vegetation Growth for Various Land Cover Types in China
Received date: 2013-04-17
Revised date: 2013-05-03
Online published: 2014-01-05
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 results has noteworthy influence in the model. In this study, MODIS–NDVI from 2001 to 2010, daily mean temperature 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 temperature in this study was defined as all the monthly mean temperature within bounds of suitable temperature for vegetation 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 vegetation types, the optimum temperature of different vegetation types, which could be used to advance parameters optimization 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 coniferous forest, evergreen broad-leaved forest, deciduous coniferous forest, deciduous broad-leaved forest, mixed forest, 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.
Key words： vegetation type; NDVI; optimum temperature; ecological model; MDOIS
LIU Zheng-Jia, LIU Ji-Yuan, SHAO Quan-Qin . Optimum Temperature of Vegetation Growth for Various Land Cover Types in China[J]. Journal of Geo-information Science, 2014 , 16(1) : 1 -7 . DOI: 10.3724/SP.J.1047.2014.00001
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