Overview of Model Systems for Global Carbon Dioxide and Methane Flux Estimates Using GOSAT and GOSAT-2 Observations

Abstract

Observational data acquired by satellites are at present a valuable tool for exploring the global carbon cycle. A key element of satellite observations is their high-frequency and global coverage, which can compensate for gaps in surface observation networks. The Greenhouse gases Observing SATellite (GOSAT) and its successor GOSAT-2 are designed to measure atmospheric carbon dioxide (CO₂) and methane (CH₄) so as to estimate their sources and sinks on subcontinental scales. This commentary gives an overview of the frameworks for estimating global surface CO₂ and CH₄ fluxes using GOSAT and GOSAT-2 observations.