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Snow buildup and water budget (JULES) #341

Closed penguian closed 5 years ago

penguian commented 6 years ago

resolution_fixed | by mrd599@nci.org.au

Analysis from Arnold shows steady increase of snow in the al623 run and corresponding drop in sea-level.

Issue migrated from trac:341 at 2024-01-31 18:32:01 +1100

penguian commented 6 years ago

@martin.dix@anu.edu.au changed priority from major to critical

penguian commented 6 years ago

@martin.dix@anu.edu.au changed status from new to assigned

penguian commented 6 years ago

@martin.dix@anu.edu.au set owner to mrd599

penguian commented 6 years ago

@martin.dix@anu.edu.au commented

In ACCESS1.0 and 1.3 snow amounts were capped with excess going to runoff and appearing as freshwater at continental edge via the river scheme. This was something we added. Both HadGEM2 and HadGEM3 had no limit on snow growth and added a separate freshwater flux to ocean as a proxy iceberg melt flux.

The GC3 documentation (https://code.metoffice.gov.uk/trac/gmed/wiki/GCDev/GCDocumentation/GC3CouplingChanges) says

Icebergs fed from land ice increases: Snow amounts on land ice gradually increase over time. In GC2.0 a blanket fresh water flux was applied to the extratropical oceans to balance this snow increase. In GC3.0 the snow amounts over land ice are passed though the coupler to NEMO's prognostic iceberg scheme and iceshelf melting scheme, maintaining water conservation.

penguian commented 6 years ago

@martin.dix@anu.edu.au changed _comment0 which not transferred by tractive

penguian commented 5 years ago

@martin.dix@anu.edu.au commented

Resolved with iceberg scheme.

penguian commented 5 years ago

@martin.dix@anu.edu.au changed status from assigned to closed

penguian commented 5 years ago

@martin.dix@anu.edu.au set resolution to fixed