全球1公里分辨率的每日表面长波辐射产物,来自2000-2023年的MODIS卫星数据
Jie Cheng1,2, Qi Zeng3,4, Hao Sun3,4
1State Key Laboratory of Remote Sensing and Digital Earth, Faculty of Geographical Science, Beijing Normal University, Beijing, 100875, China. Jie_Cheng@bnu.edu.cn.
Scientific data
|May 3, 2025
概括
这项研究引入了第一个全球每日1公里表面长波辐射数据集. 这些新的表面长波上升辐射 (SLUR) 和表面长波下降辐射 (SLDR) 产品对于气候和水循环建模至关重要.
科学领域:
- 地球科学 地球科学 地球科学
- 大气科学 大气科学
- 遥感 遥感 遥感 遥感
背景情况:
- 表面长波辐射 (SLWR) 对陆地表面过程模型,水循环和气候变化研究至关重要.
- 现有的长期,高分辨率 (1公里) 全球每日SLWR产品没有公开提供.
研究的目的:
- 开发和验证1公里分辨率的全球每日表面长波辐射产品.
- 为气候和土地表面建模提供必要的数据.
主要方法:
- 混合方法被用来估计瞬间清的天空表面长波上流辐射 (SLUR) 和表面长波下流辐射 (SLDR).
- 一个基于云基温度的单层云模型 (SLCM) 使用MODIS数据估计了瞬间的云层天空SLDR.
- 基本热红外远程传感 (ELITE) 宽带发射率 (BBE) 产品和重新分析的表面温度计算的阴天SLUR.
- ERA5再分析数据提供了日间信息,用于将时间整合到日常全天空产品中.
主要成果:
- 一个1公里分辨率的全天空每日表面长波辐射产物 (SLUR和SLDR) 被生成.
- 对369个全球地面测量站点的验证显示,每日SLUR的RMSE<18 W/m2和每日SLDR的~25 W/m2.
- 该产品的准确性与CERES-SYN.等现有数据集相提并论.
结论:
- 开发的产品填补了公众可访问的,高分辨率的,长期的每日表面长波辐射数据的关键空白.
- 验证的准确性支持其在各种陆地表面和气候建模应用中使用.
- 这一数据集将增强对地球能源预算和气候动态的理解和建模.
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