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首页> 外文期刊>International journal of remote sensing >Sensitivity of large-scale vegetation greenup and dormancy dates to climate change in the north-south transect of eastern China
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Sensitivity of large-scale vegetation greenup and dormancy dates to climate change in the north-south transect of eastern China

机译：中国东部南北样带大型植被绿化和休眠日期对气候变化的敏感性

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摘要

Phenology event responses, based on vegetation types, are strong indicators of climate variability and the ability of the vegetation to adapt to future climate changes. However, the sensitivity of phenology events to climate change along either environmental or vegetation type gradients is rarely examined. Phenological curves of major vegetation types along the North-South Transect of Eastern China (NSTEC) have been developed using wavelet and smooth-spline methods based on the normalized difference vegetation index from 1982 to 2006. Spatial-temporal patterns, trends of greenup-onset dates, dormancy dates, and growing season lengths (GSLs) during the period of 1982-2006 are presented. The greenup-onset dates were most significantly and negatively related to the temperature in cold and humid areas, but insignificantly and positively in semi-arid regions. However, dormancy date showed a positive correlation with temperature. In populations of the same vegetation type, distributed along thermal gradients of NSTEC, the phenology sensitivities to warming were different. Greenup sensitivities of cold temperate coniferous forest (CTCF) and temperate meadow steppe (TMS) increased significantly from -6.0 to 0 days °C~(-1) (p < 0.001) and from about -2.0 to 2.0 days °C~(-1) (p < 0.001), respectively. In contrast, temperate grass steppe (TGS) and temperate deciduous shrubland (TDS) showed a decreased trend of greenup sensitivity from 2.0 to -4.0 days °C~(-1) (p < 0.001) and from 2.0 to -6.0 days °C~(-1) (p < 0.001), respectively. For the dormancy date sensitivity, CTCF showed a decreasing trend from about 6.0 to 0 days °C~(-1) (p < 0.001), and subtropical evergreen-broadleaved forest (SEBF) decreased from 5.0 to -5.0 days °C~(-1) (p < 0.05).
机译：基于植被类型的物候事件响应是气候多变性和植被适应未来气候变化能力的有力指标。然而，很少研究物候事件对沿环境或植被类型梯度的气候变化的敏感性。利用小波和平滑样条方法，基于1982年至2006年的归一化植被指数，绘制了中国东部南北样带（NSTEC）主要植被类型的物候曲线。时空格局，绿​​化发生趋势列出了1982-2006年期间的日期，休眠日期和生长季节长度（GSL）。在寒冷和潮湿的地区，绿色爆发的日期与温度最显着地负相关，而在半干旱地区则无显着正相关。但是，休眠日期与温度呈正相关。在相同植被类型的种群中，沿着NSTEC的热梯度分布，物候学对变暖的敏感性不同。冷温带针叶林（CTCF）和温带草甸草原（TMS）的绿化敏感性从-6.0到0天°C〜（-1）（p <0.001）和从大约-2.0到2.0天°C〜（- 1）（p <0.001）。相比之下，温带草草原（TGS）和温带落叶灌木（TDS）的绿化敏感性趋势从2.0降低到-4.0天°C〜（-1）（p <0.001）和从2.0降低到-6.0天°C 〜（-1）（p <0.001）。对于休眠日期敏感性，CTCF从约6.0°C〜（-1）°C下降到0天（-1）（p <0.001），亚热带常绿阔叶林（SEBF）从5.0°C〜（5.0）°C〜（-）下降。 -1）（p <0.05）。

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  • 来源
    《International journal of remote sensing》 |2013年第20期|7312-7328|共17页
  • 作者

    Z. Yu; P. Sun; S. Liu; J. Wang; A. Everman;

  • 作者单位

    Division of Forestry and Natural Resources, West Virginia University, Morgantown 26506, VA, USA;

    Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, PR China;

    Chinese Academy of Forestry, Beijing, PR China;

    Division of Forestry and Natural Resources, West Virginia University, Morgantown 26506, VA, USA;

    Division of Forestry and Natural Resources, West Virginia University, Morgantown 26506, VA, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
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