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首页> 外文期刊>GIScience & remote sensing >Temperature dependence of variations in the end of the growing season from 1982 to 2012 on the Qinghai-Tibetan Plateau
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Temperature dependence of variations in the end of the growing season from 1982 to 2012 on the Qinghai-Tibetan Plateau

机译：青藏高原1982年至2012年生长期结束时温度变化的相关性

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摘要

A growing number of studies have focused on variations in vegetation phenology and their correlations with climatic factors. However, there has been little research on changes in spatial heterogeneity with respect to the end of the growing season (EGS) and on responses to climate change for alpine vegetation on the Qinghai-Tibetan Plateau (QTP). In this study, the satellite-derived normalized difference vegetation index (NDVI) and the meteorological record from 1982 to 2012 were used to characterize the spatial pattern of variations in the EGS and their relationship to temperature and precipitation on the QTP. Over the entire study period, the EGS displayed no statistically significant trend; however, there was a strong spatial heterogeneity throughout the plateau. Those areas showing a delaying trend in the EGS were mainly distributed in the eastern part of the plateau, whereas those showing an advancing trend were mostly scattered throughout the western part. Our results also showed that change in the vegetation EGS was more closely correlated with air temperature than with precipitation. Nonetheless, the temperature sensitivity of the vegetation EGS became lower as aridity increased, suggesting that precipitation is an important regulator of the response of the vegetation EGS to climate warming. These results indicate spatial differences in key environmental influences on the vegetation EGS that must be taken into account in current phenological models, which are largely driven by temperature.
机译：越来越多的研究集中在植被物候的变化及其与气候因素的关系上。然而，关于青藏高原高寒植被生长季末（EGS）的空间异质性变化以及对气候变化的响应的研究很少。在这项研究中，利用卫星衍生的归一化植被指数（NDVI）和1982年至2012年的气象记录来表征EGS变化的空间格局及其与QTP上温度和降水的关系。在整个研究期间，EGS没有显示出统计学上的显着趋势。然而，整个高原地区存在强烈的空间异质性。 EGS趋势出现延迟的区域主要分布在高原东部，而EGS趋势发生发展的区域则大部分散布在整个西部。我们的结果还表明，植被EGS的变化与气温的关系比与降水的关系更为密切。然而，随着干旱增加，植被EGS的温度敏感性降低，这表明降水是植被EGS对气候变暖的重要调节因子。这些结果表明，关键环境影响对植被EGS的空间差异在当前物候模型中必须予以考虑，而这主要是由温度驱动的。

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  • 来源
    《GIScience & remote sensing》 |2016年第2期|147-163|共17页
  • 作者

    Ding Mingjun; Chen Qian; Li Lanhui; Zhang Yili; Wang Zhaofeng; Liu Linshan; Sun Xiaomin;

  • 作者单位

    Jiangxi Normal Univ, Minist Educ, Key Lab Poyang Lake Wetland & Watershed Res, Nanchang 330022, Peoples R China|Jiangxi Normal Univ, Sch Geog & Environm, Nanchang 330022, Peoples R China|Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China;

    Jiangxi Normal Univ, Minist Educ, Key Lab Poyang Lake Wetland & Watershed Res, Nanchang 330022, Peoples R China|Jiangxi Normal Univ, Sch Geog & Environm, Nanchang 330022, Peoples R China;

    Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China;

    Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China|CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China;

    Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China;

    Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China;

    Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China|Chinese Acad Sci, IGSNRR, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    GIMMS-3g NDVI; Qinghai-Tibetan Plateau (QTP); spatial-temporal variation; climate change; end of the growing season (EGS);

    机译：GIMMS-3g NDVI;青藏高原（QTP）;时空变化;气候变化;生长期（EGS）;

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