用基于观测的数据产品评估大气和地表能源预算
Michael Mayer1,2, Seiji Kato3, Michael Bosilovich4
1Research Department, European Centre for Medium-Range Weather Forecasts, Reading, RG2 9AX UK.
Surveys in geophysics
|December 30, 2024
概括
准确的区域能源预算对于了解地球的能源不平衡至关重要. 本研究使用多个重新分析数据集评估总和干静态能源预算,揭示偏差并改进表面能量流量估计.
科学领域:
- 大气科学 大气科学
- 气候科学 气候科学
- 地球系统科学 地球系统科学
背景情况:
- 对区域大气和地表能源预算的准确诊断对于理解与地球能量不平衡 (EEI) 相关的热量吸收空间分布至关重要.
- 现有的数据产品和评估方法具有影响预算评估的局限性和假设.
研究的目的:
- 建立框架和方法,对区域大气和地表能源预算进行一致的评估.
- 评估这些预算中的不确定性,使用受观察限制的数据集.
- 从能源预算中推断出净表面能量流和大气中的二氧化碳加热.
主要方法:
- 2001-2020年区域总能源 (TE) 和干静电 (DSE) 预算的评估.
- 对ERA5,MERRA-2和JRA55再分析数据集的一致应用框架.
- 通过产品间差距和物理约束来评估不确定性.
- 净表面能量流和大气中的二氧化碳加热的推理.
主要成果:
- 能源预算中的偏差是全球<1W/m2,大陆<5W/m2,地区<15W/m2.
- 与现有数据相比,推断的净表面能量流显示了较小的大规模偏差.
- 从DSE预算中推断出的大气糖尿病加热显示出比TE预算更大的不确定性 (10-15 Wm-2).
结论:
- 该研究为评估区域能源预算在多个再分析产品中提供了一个一致的框架.
- 推断的表面能量流比现有的遥感和基于模型的估计更可靠.
- 对大气能源预算的进一步验证对于EEI研究和了解观测产品的限制是必要的.
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