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lakes and soil colour albedo parameterisation #207

Open penguian opened 5 years ago

penguian commented 5 years ago

keyword_keepgit type_defect | by inh599


In CABLE lakes are currently (Nov 2018) represented as permanently saturated bare soil. To be consistent with this the soil colour albedo should always take the saturated limit. However, within ACCESS (at least), the albedo code is called both prior and after to the lake tile is adjusted to saturation. Different parts of the code can use different albedos and energy conservation is lost.

The simplest method to avoid this is to adjust the soil colour parameterisation over lakes: In soilcol_albedo change

DO ib = 1,2 ! Number of wavebands (vis, nir)

  inc = MAX(0.11-0.40*ssnow%wb(:,1), 0._r_2)

  albsod(:,ib) = MIN(albsat(INT(soil%soilcol),ib)+inc, albdry(INT(soil%soilcol),ib))

  albsoi(:,ib) = albsod(:,ib)

END DO

to

DO ib = 1,2 ! Number of wavebands (vis, nir) inc = MAX(0.11-0.40*ssnow%wb(:,1), 0._r_2)

  WHERE (veg%iveg == 16)

inc = MAX(0.11-0.40*ssnow%sfc, 0._r_2) ENDWHERE albsod(:,ib) = MIN(albsat(INT(soil%soilcol),ib)+inc, albdry(INT(soil%soilcol),ib)) albsoi(:,ib) = albsod(:,ib) END DO

Minor adjustments maybe needed for the GW model


Issue migrated from trac:207 at 2023-11-27 11:27:27 +1100

penguian commented 4 years ago

@jxs599@nci.org.au set milestone to 6. Report

penguian commented 1 year ago

@ccc561@nci.org.au set keywords to keepgit