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城市环境为预测气候变暖下的植被现象学反应提供了新的视角

Lu Yang¹, Shuqing Zhao^1,2, Shuguang Liu^2,3

¹College of Urban and Environmental Sciences, and Key Laboratory for Earth Surface Processes of the Ministry of Education, Peking University, Beijing, China.

Global change biology

|May 30, 2023

概括

城市变暖显著改变了植物现象学,使春季提前,延迟秋季. 然而,城市的空间温度变化并不能完全预测气候变暖导致的时间变化,突出显示了复杂的生态系统反应.

科学领域:

生态生态学生态生态学
气候科学气候科学
遥感遥感遥感遥感

背景情况:

与全球平均水平相比,城市地区经历了放大温度的增加.
城市热度梯度为研究生态系统对未来气候变暖的反应提供了潜在的代理.
使用空间热梯度来预测时间现象学变化的可靠性在很大程度上未经测试.

研究的目的:

研究植物现象学动态,以应对中国各地的城市变暖.
实证测试城市环境中空间温度的增加是否可以替代时间变暖来预测现象变化.
确定影响现象敏感性在空间和时间之间关系的因素.

主要方法:

从2003年到2018年,对来自卫星的植物现象学数据进行分析.
利用了343个中国城市的陆地表面温度数据.
对空间城市化梯度的现象学反应与时间变暖趋势进行了比较.

主要成果:

广泛的城市变暖导致了春季现象学 (高度信心) 和延迟的秋季现象学 (中等信心).
城市的空间温度梯度在预测全国和大多数城市的现象学变化方面无法可靠地替代时间变暖.
年平均温度 (~11°C) 和降水 (~600mm) 门影响了跨空间和时间的现象学灵敏度大小.

结论:

城市环境在变暖下提供了对植被现象学的宝贵见解,但时空替代是有限的.
对变暖的现象反应在城市空间梯度中比时间趋势更为均.
了解这些复杂的关系对于预测生态系统对气候变化的弹性至关重要.

关键词:

气候变化气候变化空间替代时间的替代.温度灵敏度是指温度的灵敏度.城市环境城市环境植被植物现象学植物现象学

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