• Results from current missions - This session will focus on past and ongoing satellite missions measuring greenhouse gas concentrations from space, and results pertaining to using those measurements to inform science and policy.
• Results expected from future missions - This session will focus on greenhouse gas satellite missions that are either planned or currently under development, and how those missions are expected to influence science and policy.
• Retrieval algorithms and methods for inter-instrument and product Cal/Val - The session invites contribution on state-of-the art greenhouse gas retrieval techniques and on new developments, including the forward modelling of top-of-atmosphere radiances, retrieval inversion techniques, and the detection and correction of the impact of aerosols on the product quality.
• Uncertainty quantification and bias correction techniques - The session will focus on current methods and new developments in the calibration and validation of space-based and ground-based greenhouse gas products (from levels 1 through 4), both for the commissioning of new products and for their continuous monitoring and improvement. The session invites contributions on new methods for bias corrections and product bias monitoring and characterization, as well as the usage of ground-based networks for operational Cal/Val and monitoring.
• Observations to quantify hot spots and local/urban emissions - The session focuses on methods for the quantification and characterization of hot spots and local emissions as well as methods for quantification of human emissions on regional to global scales using greenhouse gas measurements from space.
• Flux estimates and atmospheric inversions from space-based GHG measurements - The session invites contributions for the derivation of fluxes from greenhouse-gas concentration products. This includes applications of such fluxes to inform emissions inventories and to improve understanding of global carbon cycle processes.
• Towards an international space-based GHG emission monitoring system - This session invites contributions on recent advances for monitoring and verification of greenhouse gas emissions, the development of such systems, in particular with respect to its space-based and ground-based validation and verification system components, and efforts to bring such systems into operations.
• Stakeholder needs and engagement for the Global Stocktake - This session will focus on linking the atmospheric GHG measurement and modeling communities with stakeholders in the national inventory and policy communities. Of particular interest are activities related to the UNFCCC Global Stocktake and how space-based GHG sensors can be used to (a) reduce uncertainty of national emission inventory reporting, identify additional emission reduction opportunities and provide nations with timely and quantified guidance on progress towards their emission reduction strategies, and (ii) track changes in the natural carbon cycle caused by human activities and climate variations.