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Spatial and Temporal Variations in Spectrum-Derived Vegetation Growth Trend in Qinghai-Tibetan Plateau from 1982 to 2014

文献类型：期刊论文

作者Wang Zhi-wei1,2,3; Wu Xiao-dong1; Yue Guang-yang1; Zhao Lin1; Wang Qian1; Nan Zhuo-tong1; Qin Yu1; Wu Tong-hua1; Shi Jian-zong1; Zou De-fu1,2
刊名SPECTROSCOPY AND SPECTRAL ANALYSIS
出版日期2016-02-01
卷号36期号:2页码:471-477
关键词Vegetation change Qinghai-Tibet plateau NDVI Temperature Precipitation
ISSN号1000-0593
DOI10.3964/j.issn.1000-0593(2016)02-0471-07
通讯作者Zhao Lin(linzhao@lzb.ac.cn)
英文摘要Recently considerable researches have focused on monitoring vegetation changes because of its important role in regulating the terrestrial carbon cycle and the climate system. There were the largest areas with high-altitudes in the Qinghai-Tibet Plateau (QTP), which is often referred to as the third pole of the world. And vegetation in this region is significantly sensitive to the global warming. Meanwhile NDVI dataset was one of the most useful tools to monitor the vegetation activity with high spatial and temporal resolution, which is a normalized transform of the near-infrared radiation (NIR) to red reflectance ratio. Therefore, an extended GIMMS NDVI dataset from 1982-2006 to 1982-2014 was presented using a unary linear regression by MODIS dataset from 2000 to 2014 in QTP. Compared with previous researches, the accuracy of the extended NDVI dataset was improved again with consideration the residuals derived from scale transformation. So the model of extend NDVI dataset could be a new method to integrate different NDVI products. With the extended NDVI dataset, we found that in growing season there was a statistically significant increase (0. 000 4 yr(-1), r(2) =0. 585 9, p<0. 001) in QTP from 1982 to 2014. During the study period, the trends of NDVI were significantly increased in spring (0. 000 5 yr(-1), r(2) = 0. 295 4, p = 0. 001) summer (0. 000 3 yr(-1), r(2) = 0. 105 3, p=0. 065) and autumn respectively (0. 000 6 yr(-1), r(2) =0. 436 7, p<0. 001). Due to the increased vegetation activity in Qinghai-Tibet Plateau from 1982 to 2014, the magnitude of carbon sink was accumulated in this region also at this same period. Then the data of temperature and precipitation was used to explore the reason of vegetation changed. Although the trends of them are both increased, the correlation between NDVI and temperature is higher than precipitation in vegetation growing season, spring, summer and autumn. Furthermore, there is significant spatial heterogeneity of the changing trends for ND-VI, temperature and precipitation at Qinghai-Tibet Plateau scale.
收录类别SCI
WOS关键词ECOSYSTEM PRODUCTIVITY ; FOREST ; SEASON ; NDVI
WOS研究方向Spectroscopy
WOS类目Spectroscopy
语种英语
WOS记录号WOS:000370208400032
出版者OFFICE SPECTROSCOPY & SPECTRAL ANALYSIS
URI标识http://www.irgrid.ac.cn/handle/1471x/2557399
专题寒区旱区环境与工程研究所
通讯作者Zhao Lin
作者单位1.Chinese Acad Sci, Cold & Arid Reg Environm & Engineer Res Inst, Cryosphere Res Stn Qinghai Tibet Plateau, State Key Lab Cryosher Sci, Lanzhou 730020, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Guizhou Acad Agr Sci, Guizhou Inst Prataculture, Guiyang 550006, Peoples R China
推荐引用方式
GB/T 7714		 Wang Zhi-wei,Wu Xiao-dong,Yue Guang-yang,et al. Spatial and Temporal Variations in Spectrum-Derived Vegetation Growth Trend in Qinghai-Tibetan Plateau from 1982 to 2014[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2016,36(2):471-477.
APA Wang Zhi-wei.,Wu Xiao-dong.,Yue Guang-yang.,Zhao Lin.,Wang Qian.,...&Zou De-fu.(2016).Spatial and Temporal Variations in Spectrum-Derived Vegetation Growth Trend in Qinghai-Tibetan Plateau from 1982 to 2014.SPECTROSCOPY AND SPECTRAL ANALYSIS,36(2),471-477.
MLA Wang Zhi-wei,et al."Spatial and Temporal Variations in Spectrum-Derived Vegetation Growth Trend in Qinghai-Tibetan Plateau from 1982 to 2014".SPECTROSCOPY AND SPECTRAL ANALYSIS 36.2(2016):471-477.

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来源：寒区旱区环境与工程研究所

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