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Activity Number: 394 - Spatial and Spatio-Temporal Modeling in Climate and Meteorology
Type: Contributed
Date/Time: Wednesday, August 10, 2022 : 8:30 AM to 10:20 AM
Sponsor: Section on Statistics and the Environment
Abstract #323091
Title: Model Discrepancy in CO2 Retrievals from the OCO-2 Satellite
Author(s): Jenny Brynjarsdottir*
Companies: Case Western Reserve University
Keywords:
Abstract:

The Orbiting Carbon Observatory 2 (OCO-2) collects space-based measurements of atmospheric CO2. The CO2 measurements are indirect since the instrument observes radiances (reflected sunlight) over a range of wavelengths and a physical model is inverted, via Bayes Theorem, to estimate CO2 concentration in the atmosphere. This inference is in fact an estimation of physical parameters (an inverse problem) which can be both biased and over-confident when model error is present but not accounted for. The OCO-2 mission addresses this problem in a few different ways, e.g. with a post-inference bias correction procedure based on ground measurements. This talk will discuss methods to account for structured and informative model error directly in the inversion procedure to lessen bias and provide more reliable uncertainty estimates.


Authors who are presenting talks have a * after their name.

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