Date
Time
- PST:
- EST: 3:40-5:40pm
Call Info
- web session:
- call number:
Attendees
lots of people
Goals
- talk about coupled teams Coupled Simulation Group "Tune and Validate" Road Map Priorities for 23 May 2016 - 30 June 2016
What Actually Happened
- Chris Golaz read through the tasks listed under goals.
- Robert Jacob expressed surprise that he was in charge of water+energy budgets (reflecting communication breakdown)
- Peter Thornton noted that land tuning task was related to leaf albedo rather than leaf area index
- Peter Thornton: does each component have its own conservation checking?
- Phil Rasch (pnl.gov): atmos has checks
- Peter Caldwell: but they are broken and we know from RESTOM-RESSURF and other checks that energy and water in atmos don't conserve.
- Doug Jacobsen (Unlicensed): ocean has conservations checks. Problem seems to be in coupling between components - he has a python script available to look at coupler history files. He figured out part of the reason why ocean lost 3m was river runoff was screwed up. Still have ~1m of lost ocean over 40 yrs though. Notes that G cases conserve... only B cases don't.
- Gautam Bisht notes that CLM4.5 doesn't crash when energy conservation errors are found (error call is commented out). It should print warning messages though.
- Phil Rasch (pnl.gov): atmos has checks
- Phil Rasch (pnl.gov) points out that he's still unclear whether snowfall onto land or ocean accounts for the latent heat of fusion properly
- Doug Jacobsen (Unlicensed) assures us that ocean is carrying latent heat of fusion for snow and ice (i.e. snow melts and takes up heat when hits ocean)
- On a related note, Doug Jacobsen (Unlicensed) points out that the ocean assumes river runoff occurs at whatever temperature the ocean layer it flows into has.
- Todd Ringler (Unlicensed) points out that there are lots of places like this where one component makes assumptions about transfer across components because the info it needs isn't available through the coupler (or at all).
- This makes a small effect globally (O(0.1 W/m2)), but can be big regionally (O(10 W/m2)).
- Chris Golaz points out that passing rain T to ocean would require tracers tracking the temperature of ice, liquid, etc in each cell. This would be a big undertaking.
- Todd Ringler (Unlicensed) points out that there are lots of places like this where one component makes assumptions about transfer across components because the info it needs isn't available through the coupler (or at all).