NASA OCO-2 Project

This is the Gridded Daily OCO-2 Carbon Dioxide assimilated dataset. The OCO-2 mission provides the highest quality space-based XCO2 retrievals to date. However, the instrument data are characterized by large gaps in coverage due to OCO-2’s narrow 10-km ground track and an inability to see through clouds and thick aerosols. This global gridded dataset is produced using a data assimilation technique commonly referred to as state estimation within the geophysical literature. Data assimilation synthesizes simulations and observations, adjusting the state of atmospheric constituents like CO2 to ref...本数据集为网格化逐日OCO-2二氧化碳同化数据集（Gridded Daily OCO-2 Carbon Dioxide assimilated dataset）。OCO-2任务迄今可提供最高质量的天基二氧化碳柱混合比（XCO2）反演产品，但该仪器数据的覆盖范围存在大量空白，这源于OCO-2仅拥有10公里宽度的窄地面轨迹，且无法穿透云层与厚重气溶胶。本全球网格化数据集采用地球物理领域文献中常被称为状态估计（state estimation）的数据同化技术制作而成。数据同化技术可融合模拟结果与观测数据，调整二氧化碳等大气组分的状态以