surface fluxes

[LenkaNovak]

This issue updates the surface flux handling for the new ClimaCoupler release.

Branch issue of #276

Components

Surface fluxes within the coupler need to be updated for

• new ClimaAtmos interface (which splits Atmos flux calculation and boundary condition specification). After discussions with the Atmos team, it was decided to calculate fluxes in the coupler in the intermediate term (so that different surfaces can be accounted for)
• write flux calculating functions
  • turbulent fluxes calculated for each individual surface (partial flux calculation)
  • radiative fluxes still calculated in the atmosphere, by passing in an average T_sfc
• convert the flux calculation into a general module in src
• write tests for the flux calculating functions

Tasks

• prototype of the above features [26 May]
  • in this case, it's difficult to visualize the entire product incrementally, so we will put together a prototype in a draft PR, that will be later split into smaller PRs for better review. Clean up surfce fluxes #296
• split prototype PR and merge changes including the following tests [31 May]
  • update combine_surfaces! and update_surface_fractions! Update combine_surfaces!  #317
  • move push_pull! to src by setting up a FieldExchange and FluxCalculator modules with tests Move push_pull!.jl functionality to src/ #321
    • check that there is no unnecessary flux calculation files, adding the corrections for ice cover
    • conservation checks
• update for Atmos 0.15.1 Update the Coupler to use ClimaAtmos v0.15.0 #308
• cleaner q_sat calculation Add coupler's (combined) rho_sfc and q_sfc_sat calculation  #330 , Use updated ClimaAtmos cache #231, Enable q_sfc to be calculated by each surface model #338
• add partial flux calculation
  • implement the remaining piece of the Clean up surfce fluxes #296 prototype with the partitioned flux functionality
  • check surface flux calculation for all masking options (incl.
    Bring back unsaturated surfaces #237 ) Flux partitioning #360
    • masking tested in unit tests of Update combine_surfaces!  #317

[LenkaNovak]

Complete