南非TROPOMI甲观测的贝叶斯反转:对自下而上的库存的影响
Keneuoe A Maliehe1, James Goulding2, Stuart Marsh3
1Nottingham Geospatial Institute, University of Nottingham, 30 Triumph Road, Nottingham, NG7 2TU, UK; Neodermographics Lab, Nottingham University Business School, Wollaton Road, Nottingham, NG8 1BB, UK.
The Science of the total environment
|March 13, 2026
概括
根据首次基于卫星的反向分析,南非2019年甲 (CH4) 排放量比库存估计的低62%. 这项研究强调了温室气体量化方法的潜在不准确性.
科学领域:
- 大气化学 大气化学
- 环境科学 环境科学
- 遥感 遥感 遥感 遥感
背景情况:
- 准确量化甲 (CH4) 排放对于减缓气候变化至关重要.
- 南非国家温室气体库存依赖于自下而上的方法,这些方法可能具有固有的不确定性.
- 卫星观测提供了一种独立的方法来验证排放.
研究的目的:
- 通过使用卫星数据,对南非2019年年均甲排放量进行首次反向分析.
- 将来自卫星的CH4排放量与现有的自下而上的库存估计进行比较.
- 为了评估南非网格化CH4库存的准确性.
主要方法:
- 利用TROPOMI卫星观测进行甲 (CH4) 测量.
- 使用集成甲逆向工具v2进行数据分析.
- 使用EDGAR v8温室气体库存作为预先估计.
主要成果:
- 估计2019年年均甲排放量为0.65 Tg CH4 yr-1.
- 发现排放量比自下而上的库存估计低62%.
- 确定了畜牧业地区的排放因子和活动数据中的潜在不确定性.
结论:
- "自下而上"的方法可能会显著高估甲 (CH4) 排放量,特别是在牲畜占主导地位的地区.
- 基于卫星的反向分析为改善国家排放清单提供了关键的观察约束.
- 这项研究为南非甲排放库存提供了首次基于卫星的评估.
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