Davis (CMS 2020): Preparing the global CMS Flux system for application to carbon flux inventories via regional-scale, observation-based evaluations
Kenneth James Davis, The Pennsylvania State University, kjd10@psu.edu
Junjie Liu, JPL, junjie.liu@jpl.nasa.gov (Presenter)
The global CMS Flux system uses satellite CO2 measurements to estimate global CO2 sources and sinks with state-of-the-art data assimilation algorithms. CMS Flux is developing a nested flux estimation system with high-resolution over North America to serve the needs of natural resource managers who need information specific to regional biomes and geopolitical units.
This high-resolution flux estimation system has the potential to provide regional flux constraints with the precision and accuracy required to serve the needs of natural resource managers in the United States and around the globe. We propose a multi-observational evaluation of both the global and nested CMS Flux system and its products in North America. The results of this evaluation will be used to guide further development of the CMS Flux system components so that its flux estimates can improve the US national greenhouse gas (GHG) reporting system. The integration of this system with US biological GHG inventories will create a roadmap toward explicit integration of the CMS Flux system with the US and global forest and agricultural carbon inventory assessments.
The proposed research has four objectives:
1. Incorporate US forest, agricultural and grassland CO2 inventories into the prior flux estimates used in the CMS Flux system.
2. Use a suite of independent CO2 flux and mole fraction observations to evaluate and improve the CMS Flux system prior fluxes at regional, daily, and seasonal resolution over North America.
3. Evaluate and improve the CMS Flux system meteorology with a suite of North American wind speed and direction, and mixing depth observations.
4. Use the results of the first three objectives to demonstrate improvements in the ability of the CMS Flux system to estimate North American CO2 sources and sinks. Use the results of this demonstration to evaluate US biological CO2 flux inventories.
This project will result in reduced uncertainty in the CMS Flux CO2 flux estimates, and will demonstrate a system for incorporating US agricultural and forest inventories directly into the inversion system. We will determine whether or not the CO2 flux estimates from this improved inversion system are sufficiently precise and accurate to provide a useful constraint on US inventories of agricultural and forest CO2 fluxes. This work will provide a path for developing similar inventory assessments for other years, and in other parts of the globe.
This project will benefit NASA’s Carbon Monitoring System by advancing the use of satellite remote sensing as an alternative or a supplement to ground-based methods for quantifying net carbon emissions, improving CMS products for flux resulting from NASA’s earlier phases of CMS pilot studies, and using remote sensing data to evaluate and enhance national reported carbon emissions inventories from bottom-up estimates from various sectors of emissions within the United States with methods that have the potential to be applied to reported national inventories from other nations.
Associated Project(s):
Poster Location ID: 23
Presentation Type: Poster
Session: Poster Session 1
Session Date: Wednesday (9/27) 1:15 PM