Stephen Price will lead this discussion with help from Ruby Leung, Jon Wolfe, and Jeremy Fyke (Unlicensed)
Charge to attendees:
- are there opportunities on our current science problems there are being neglected?
- water cycle
- biogeochemistry
- ocean-cryosphere
- what science problems exist that we should be looking at that we are not looking at?
- tropical cyclones
- electrification
- where are we subcritical?
- feel free to flesh out things that Phil brought up during the main atm session
- What model features need to be fixed?
- pressure gradient term
- sub-column treatment for radiation (convective/stratiform partitioning)
- What physics is missing/deficient? (Ideas relevant to ACME science, but not vetted/definitive)
- elevation classes
- deep dive for v2 data structures and will intersect w the CMDV software project (Ghan, Goldhaber, Salinger, Taylor, Atm GLs)
- Surface coupling
- Intersection with parallel/sequential splitting of physics processes?
- deep convection
- cloud overlap (correlation length scales)
- See Talking points on Radiative Transfer + Prather Fast-J → generalized shortwave code
- consistent treatment of cloud precipitation and aerosol scavenging
- Improvements to aerosols
- Prognostic aerosol surface area
- Modify MAM aerosols to allow stratospheric aerosols
- Gas/Particle partitioning (MOSAIC) & Nitrate
- SOA
- Brown Carbon
- Speciated Dust
- What software capabilities are missing?
- in-situ diagnostics (diurnal cycles, PDFs, etc, c.f. Katherine Calvin (Unlicensed), Po-Lun Ma, Steve Goldhaber (Unlicensed) conversations)
- easy to create and use data models
- ?
- More Atm Chemistry? (from conversation with Ruby Leung)
- For biogeochemistry, the v2/v3 focus is on the impacts of different carbon reduction pathways (e.g., high fossil fuel vs. high renewable energy penetration) on the carbon sink and associated impacts on water availability. We’ve identified a particular need for improving modeling of the nitrogen cycle as relate to the terrestrial C-N cycle, land use (e.g., land management/fertilizers), and related atmospheric chemistry. This topic fits in well with the biogeochemistry question for v2/v3 and we also recognized the opportunities to collaborate with university teams on topic.
- We will continue this discussion and include others to further define key atmospheric chemistry modeling needs that are consistent with the v2/v3 science drivers. For example, one topic that still needs to be explored is the methane cycle
- elevation classes