Opened 10 years ago

Closed 10 years ago

Last modified 4 years ago

#730 closed Enhancement (fixed)

diurnal cycle of qsr from daily values

Reported by: smasson Owned by: smasson
Priority: low Milestone:
Component: OCE Version: trunk
Severity: Keywords: 2010 trunk
Cc: Review:
MP ready?:
Progress:

Description

commit this long time existing feature…
from daily forcing of qsr, redistribute it at sbc time step (kt*nn_fsbc) with a temporal interpolation following the diurnal cycle.

  • Originally developed by Berbie, already used on the ES and by DRAKKAR

ref, see:

Bernie, DJ, Guilyardi, E, Madec, G, Slingo, JM and Woolnough, SJ
Impact of resolving the diurnal cycle in an ocean--atmosphere GCM. Part 1: a diurnally forced OGCM
Climate Dynamics 29:6, 575-590 (2007)
  • input forcing must be daily
  • it is recommended to have a least 8 sbc time-setp per day ⇒ 86400/(rdt*nn_fsbc) > 8
  • works only for blk_core and flx

Commit History (0)

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Attachments (4)

tstdcy.gif (97.4 KB) - added by smasson 10 years ago.
reconstruction of diurnal cycle
tstdcy2.gif (93.3 KB) - added by smasson 10 years ago.
diff between daily mean and mean of diurnal cycle (see Berbie paper…)
tstdcy.3.gif (98.1 KB) - added by smasson 10 years ago.
new reconstruction of the diurnal cycle
tstdcy2.2.gif (70.3 KB) - added by smasson 10 years ago.
NEW diff between daily mean and mean of diurnal cycle

Download all attachments as: .zip

Change History (17)

comment:1 Changed 10 years ago by smasson

  • Owner changed from NEMO team to smasson

done, see changeset:2187

Changed 10 years ago by smasson

reconstruction of diurnal cycle

Changed 10 years ago by smasson

diff between daily mean and mean of diurnal cycle (see Berbie paper…)

comment:2 Changed 10 years ago by smasson

I attached 2 plots:

  • 12 reconstructed diurnal cycle every 2h (from 1am to 11pm)
  • the difference between the original daily mean and the daily mean recomputed from the diurnal cycle. the difference is small (max 5/12 = ~0.4 W/m2) and explained in the paper of Bernie et al. fig 10). Note that the diff is smaller if there is more time step per day (better fit the analytical solution)

comment:3 Changed 10 years ago by smasson

code review done by Gurvan, see changeset:2188

comment:4 Changed 10 years ago by smasson

bugfix on the definition of the limits of the time interpolation as sbc_dcy is called every rn_rdt * nn_fsbc.

⇒ now we have the perfect conservation of the diurnal cycle. see attached plots

see changeset:2210

Changed 10 years ago by smasson

new reconstruction of the diurnal cycle

Changed 10 years ago by smasson

NEW diff between daily mean and mean of diurnal cycle

comment:5 Changed 10 years ago by smasson

adapt for coupled mode, see changeset:2216

comment:6 Changed 10 years ago by gm

  • Resolution set to fixed
  • Status changed from new to closed

comment:7 Changed 4 years ago by nicolasmartin

  • Keywords 2010 3: Developments Implementation Stream features new of added

comment:8 Changed 4 years ago by nicolasmartin

  • Keywords 3: removed

comment:9 Changed 4 years ago by nicolasmartin

  • Keywords developments added; Developments removed

comment:10 Changed 4 years ago by nicolasmartin

  • Keywords of removed

comment:11 Changed 4 years ago by nicolasmartin

  • Keywords trunk added; Implementation Stream developments features removed

comment:12 Changed 4 years ago by nicolasmartin

  • Keywords new removed

comment:13 Changed 4 years ago by nicolasmartin

  • Milestone 2010 Stream 3: Developments & Implementation of new features deleted

Milestone 2010 Stream 3: Developments & Implementation of new features deleted

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