接近地表和陆地表面温度的当地每小时趋势
Sarah Safieddine1, Cathy Clerbaux2, Joaquín Muñoz-Sabater3
1LATMOS/IPSL, Sorbonne Université, UVSQ, CNRS, Paris, France. sarah.safieddine@latmos.ipsl.fr.
Scientific reports
|August 15, 2025
概括
全球温度趋势因当地的日间时间而异,这是一个经常被忽视的关键因素. 分析日间温度变化对于准确的气候评估和有效的适应策略至关重要.
科学领域:
- 气候科学 气候科学
- 地球系统科学 地球系统科学
- 环境监测 环境监测
背景情况:
- 像近地表 (T2m) 和陆地表面温度 (LST) 这样的基本气候变量在全球范围内以协调宇宙时间 (UTC) 报告.
- 昼间温度变化创造了以前在全球或区域范围内未被分析的局部时间依赖的趋势.
研究的目的:
- 根据当地时间和月份评估温度趋势 (LST和T2m).
- 调查当地时间对观察到的温度趋势及其空间变化的影响.
主要方法:
- 使用了ECMWF ERA5-Land从1981-2022年重新分析的数据.
- 分析了考虑到当地时间和月份的温度趋势.
- 纳入了MODIS观测,以检查卫星赤道穿越时间对LST趋势的影响.
主要成果:
- 温度趋势表现出每日显著的变化,通常在下午达到顶峰.
- 对LST和T2m的观察到的变暖或降温趋势显示出半球间的实质性空间异质性.
- 卫星数据 (例如,MODIS TERRA/AQUA) 标称赤道穿越时间明显影响LST趋势分析.
结论:
- 在气候变化评估中,考虑当地时间至关重要.
- 昼间温度变化对趋势分析产生重大影响,因此需要将其纳入强大的气候研究.
- 改进的适应策略需要对纳入当地时间效应的温度趋势有细微了解.
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