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topic | leads | time | notes (e.g., what material would be useful to lead discussion?) | |||||
|---|---|---|---|---|---|---|---|---|
8:00 | Towards Improved Model Skill and Reduced Bias: What new physics are candidates for reducing polar biases and improving polar skill? | 10 min intro + 10 min discussion |
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8:20 | Resolution vs. Numerics & Physics: What aspects of the numerics are known to need improvement, and where is there no substitute for, and dependence on, resolution? | 10 min intro + 10 min discussion |
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8:40 | Polar Contributions to V3: How are we contributing to the V3 release and the large ensemble? How do these efforts mesh with the polar simulation campaign. | 10 min intro + 10 min discussion | /wiki/spaces/PSC/pages/3664576543 |
Notes from 1st Breakout session:
Carolyn: Teleconnections
Which teleconnection should we look at?
[Renu] Atmospheric Rivers over the Antarctic (RGMA portfolio)
[Andrew R] the Stratosphere sees sea ice (polar vortex + atm patterns - do depend on sea ice —> impact on jet stream location/water resources over continental US)
[Renu] Arctic Atm rivers - work by Hailong
[Wieslaw] Phase 3 Hilat-Rassm looks at the Arctic to US precipitation teleconnections. Already working with E3SM people to set up E3SM-Arctic. [Carolyn] How to best collaborate? [W] any way we can
[Andrew R] useful to look at the impact of regional refinement on teleconnections.
[Steve] Difficult to publish SORRM results (given global climate biases) but teleconnections seem promising.
[Wuyin] maybe also modes of variability - looking ahead to v3: better tropical variability in atmv3. May look at polar impacts from that. Caveat: teleconnections seem worse in v3.
[Carolyn] has anyone looked at teleconnections in NARRM? [Renu] some university projects.
[Hailong] Hilat: sea ice changes impact fire risk in US. Current phase: focus on Arctic amplification. Will assess variability in Arctic-RRM? Open to looking at SORRM and sharing data from Arctic-RRM
Anyone has comments about ensemble design?
[Wieslaw] Arctic teleconnections seem to require 200+ ensemble members (cf. paper). Maybe not good news
[Steve] same said by “NCAR guy” (Fasullo?) - maybe better to focus on the SO than the Arctic.
Andrew R: Exclusion experiments
[Steve] how easy are these things? Turning the sun off might be easy but others? Andrews: depends. For sea ice, stresses are easy, fluxes are hard.
[Mark] we do that in a single component (term by term; spin-down experiments) but not in the coupled framework.
[Shixuan] How long would we need to do it for, given the ocean? [Andrew] Atm paper - sun off = spin down in 6 weeks. Ocean may be similar from spin-up timescales.
[Wuyijn] same concern about cost/timescales; and how would that actually inform the source of the bias in the coupled run?
[Luke] did some in the AMOC working group.
[Mark] need to have a theoretical answer, else it looks different but tells us nothing specific
[Andrew] could turn off the sea ice dynamics. To avoid the ice bias (sea ice going everywhere) and impacting