完善全球图像:提高分辨率对CO2的影响 大气逆转使用OCO-2 XCO2 检索
Zoé Lloret1, Frédéric Chevallier1, Anne Cozic1
1Laboratoire des Sciences du Climat et de l'Environnement LSCE/IPSL CEA-CNRS-UVSQ Université Paris-Saclay Gif-sur-Yvette France.
概括
这项研究提高了CAMS/LSCE反转系统的空间分辨率,以更精确地估计大气中的二氧化碳 (CO2). 更高的分辨率可以提高二氧化碳的表现,特别是在综合尺度上,并证明了计算效率.
科学领域:
- 地球系统科学 地球系统科学
- 大气化学 大气化学
- 气候建模气候模型
背景情况:
- 大气中二氧化碳 (CO2) 度的上升需要准确的全球排放和消除估计.
- 目前的倒置系统需要改进,以改善空间和时间的二氧化碳监测.
研究的目的:
- 改进CAMS/LSCE反转系统的空间分辨率,以提高二氧化碳流量估计.
- 评估更高分辨率对大气二氧化碳表示和流量计算的影响.
主要方法:
- 在CAMS/LSCE反转系统中实现了精细的空间分辨率 (0.7°度,1.4°经度).
- 纳萨OCO-2中午清天空柱平均干燥空气分子二氧化碳 (XCO2) 分数数据两年.
- 根据独立的表面测量和AirCore配置文件验证的结果.
主要成果:
- 提高分辨率提高了在 synoptic 时间尺度上大气二氧化碳的表现,通过表面测量进行验证.
- 在22公里以上的垂直CO2配置文件中观察到差异,但没有影响与地面数据相对应的XCO2估计.
- 全球和区域的自然流量估计是相似的,尽管北美在2016年表现出更强大的自然沉没在更高的分辨率.
结论:
- 精细的CAMS/LSCE系统提供了合理的全球和区域碳流量估计.
- 更高的分辨率在GPU上具有计算效率,使其适合作为新标准.
- 该研究证明了高分辨率大气逆转对二氧化碳监测的价值.
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