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在城市化背景下,陆地表面现象学的动态变化和驱动因素

Xin-Qian Hong^1,2, Tao Sun³, Li-Ding Chen^1,3,4

¹School of Ecology and Environmental Science, Yunnan University, Kunming 650091, China.

Ying yong sheng tai xue bao = The journal of applied ecology

|October 29, 2023

概括

城市化显著改变了植被现象学,与丘陵地区相比,城市地区表现出较早的春季绿化和较晚的秋季衰老. 土地表面温度是由城市热岛效应驱动的,与空气温度一起在影响这些变化方面发挥着关键作用.

科学领域:

生态学研究生态学研究
城市生态学城市生态学
遥感应用遥感应用

背景情况:

快速的城市化影响了植被现象学.
影响城市植被现象学的时空变化的因素尚不清楚.
了解这些变化对于评估城市生态系统健康和碳捕获至关重要.

研究的目的:

调查北京-天津-河北城市聚集区内城市植被现象学的时空变化.
为了比较城市建筑和丘陵地区之间的现象学差异.
分析降水,空气温度和土地表面温度 (LST) 对植被现象学的影响.

主要方法:

利用五种合适的方法来构建规范差异植被指数 (NDVI) 曲线.
从2001年到2019年,应用了值方法来得出现象学特征 (生长季节的开始和结束).
城市建筑和山区之间的现象学指标比较,分析气候因素.

主要成果:

与丘陵地区相比,城市建筑区的生长季节开始较早 (SOS) 16.88天,生长季节结束较晚 (EOS) 12.22天.
城市地区的SOS逐渐延迟,而在丘陵地区的SOS进展,城市地区的现象变化速度更快.
土地表面温度 (LST) 和空气温度在城市地区对SOS的贡献几乎相等,突出了城市热岛效应.

结论:

城市化在城市植被中显著推进了春季现象,并推迟了秋季现象.
城市热岛效应与空气温度相结合,大大影响了城市植被现象学.
研究结果提供了关于城市化在植被现象学转变中的作用的见解,并为评估城市碳汇潜力提供了信息.

关键词:

空气温度空气温度空气温度土地表面的温度地表的温度现象学 (phenology) 是一种现象学.降水降水降水降水降水城市化的城市化.

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