EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

From concentrations requirements to emission committments: prospects and challenges for the Global Stocktake

Kevin Bowman1, Junjie Liu1, Anthony Bloom1, Sassan Saatchi1, Liang Xu1, Kazayuki Miyazaki1, Meemong Lee1, Dimitris Menemenlis1, Dustin Carroll2, and David Schimel1
Kevin Bowman et al.
  • 1Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States of America
  • 2Moss Landing Marine Laboratories, Moss Landing, United States of America

The Paris Agreement was a watershed moment in providing a framework to address the mitigation of climate change.  The Global Stocktake is a bi-decadal process to assess progress in greenhouse gas emission reductions in light of climate feedbacks and response.   However, the relationship between emission commitments and concentration requirements is confounded by complex natural biogeochemical processes potentially modulated by climate feedbacks.  We investigate the prospects and challenges of mediating between emissions and concentrations through the NASA Carbon Monitoring System Flux (CMS-Flux) project, which is an inverse modeling and data assimilation system that ingests a suite of observations including the Orbital Carbon Observatory (OCO-2) and state-of-the-art biomass change maps across the carbon cycle to attribute atmospheric carbon variability to anthropogenic and biogeochemical processes. We decompose the spatial drivers of CO2 accumulation since the beginning of the decade into component fluxes and emissions in the context of the historic 2010 and 2015 El Ninos, which had a tremendous influence on the CO2 growth rate.  These processes reshuffle the primary contributors of CO2 growth at Stocktake time scales that must be reconciled with Nationally Determine Contributions and concentration targets.  Based on these findings, we investigate how systems such as CMS-Flux can harness the carbon constellation to fill a vital gap between policy needs and scientific assessment needed for the Stocktake.

How to cite: Bowman, K., Liu, J., Bloom, A., Saatchi, S., Xu, L., Miyazaki, K., Lee, M., Menemenlis, D., Carroll, D., and Schimel, D.: From concentrations requirements to emission committments: prospects and challenges for the Global Stocktake, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-6202,, 2020

This abstract will not be presented.