用谷歌地球引擎在山区对陆地表面温度变化进行时间序列分析
Cátia Rodrigues de Almeida1,2,3, Nuno Garcia4, João C Campos4
1Department of Geosciences, Environment and Land Planning, University of Porto, Rua Campo Alegre, 687, 4169-007, Porto, Portugal.
Heliyon
|August 18, 2023
概括
蒙特西尼霍自然公园的气温在夏季保持稳定,但在冬季夜晚上升. 环境因素和植被强烈影响了陆地表面温度,遥感被证明是有效的监测这些变化.
科学领域:
- 环境科学 环境科学
- 遥感 遥感 遥感 遥感
- 生物多样性保护 生物多样性保护
背景情况:
- 了解温度动态对于环境和生物多样性研究至关重要,特别是在复杂的山区.
- 山区在温度数据收集方面存在独特的挑战.
- 蒙特西尼霍自然公园 (MNP) 是一个具有高生物多样性的重要保护区,需要进行局部温度变化分析.
研究的目的:
- 为了分析Montesinho自然公园内的时间温度变化.
- 确定影响土地表面温度 (LST) 的环境因素.
- 研究植被和温度变化之间的关系.
主要方法:
- 使用中等分辨率成像光谱辐射仪 (MODIS) 数据 (LST,增强植被指数 - EVI,蒸发 - ET) 从2003-2021年通过谷歌地球引擎.
- 与当地的空气温度 (Tair) 数据相关联的LST.
- 应用曼 - 肯达尔趋势测试 LST 时间趋势和局部空间统计协会 (LISA) 温度区的空间稳定性.
主要成果:
- 陆地表面温度 (LST) 与空气温度 (Tair) (ρ > 0.7) 有着很强的相关性.
- 夏季LST在上午11点和下午1点受到生物物理指数 (EVI,ET) 的显著影响.
- 冬季的夜晚经历了温度升高,而夏季的温度保持稳定.
- 使用LISA确定了稳定的热和冷LST区域.
结论:
- 遥感数据有效地测量了MNP的温度变化.
- 冬季夜间变暖和稳定的夏季温度是MNP最近的气候特征.
- 环境和植被因素在公园内的LST调节中发挥着重要作用.
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