1 / 22

H compset experiments

H compset experiments. Robert Osinski , Wieslaw Maslowski, Jaromir Jakacki , Jackie Clemant -Kinney, Andrew Roberts RASM workshop, NPS, May 2012. Channel problem. Volume transport through the channel. Scalability of H compset. Timing profile. Experiments H_NC2_AL0_ST0_CP0_D0_T0.

akira
Télécharger la présentation

H compset experiments

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Hcompset experiments Robert Osinski, Wieslaw Maslowski, JaromirJakacki, Jackie Clemant-Kinney, Andrew Roberts RASM workshop, NPS, May 2012

  2. Channel problem

  3. Volume transport through the channel

  4. Scalability of H compset

  5. Timing profile

  6. ExperimentsH_NC2_AL0_ST0_CP0_D0_T0 • Inter-annually varying forcing (IAF), as developed by Large and Yeager (2008) at NCAR: CORE2 • Ice albedo • Ice mechanical redistribution (sea ice strength) • Coupling – especially how the momentum flux is transfer from atmosphere to the sea ice • Ocean dynamics • Time steps in both ice and ocean models

  7. 30-year long runs. 1978-2007Five 30-year tests are finished and another three are currently running. • H_NC2_AL0_ST0_CP0_D0_T0 – Control run All default values; albedo type= constant • H_NC2_AL1_ST0_CP0_D0_T0 Albedo type = default (ahmax = 0.5m) - albedo is constant above this thickness • H_NC2_AL2_ST0_CP0_D0_T0 Albedo type = default (ahmax = 0.5m) - albedo is constant above this thickness ; shortwave='dEdd’ • H_NC2_AL3_ST1_CP0_D0_T0 Albedo type = default (ahmax = 0.3m) - albedo is constant above this thickness ;Cf=5.6 • H_NC2_AL4_ST1_CP0_D0_T0 • Albedo type = default (ahmax = 0.1m) - albedo is constant above this thickness ; shortwave=’default’; Cf=5.6

  8. AL0 and AL1All default values; albedo type= constant; albedotype = default(ahmax = 0.5m)

  9. AL0 and AL1All default values; albedo type= constant; albedotype = default(ahmax = 0.5m)

  10. AL1 and AL2 albedotype = default(ahmax = 0.5m); Albedo type = default (ahmax = 0.5m) ; shortwave='dEdd’

  11. AL1 and AL2albedotype = default(ahmax = 0.5m); Albedo type = default (ahmax = 0.5m) ; shortwave='dEdd’

  12. AL3Albedo type = default (ahmax = 0.3m) - albedo is constant above this thickness ;Cf=5.6

  13. AL0,AL1 and AL4albedo type= constant; albedotype = default(ahmax = 0.5m);Albedo type = default (ahmax = 0.1m) ; shortwave='default’, Cf=5.6

  14. Al1 and AL4albedotype = default(ahmax = 0.5m);Albedo type = default (ahmax = 0.1m) ; shortwave='default’, Cf=5.6

  15. Some conclusions • Default values of the model settings give not enough sea ice in the results. • 2007 ice extent minima was reproduced correctly with H_NC2_AL1_ST0_CP0_D0_T0 experiment. • We still have not get the proper sea ice thickness distribution. • The default ahmax=0.5 m is probably too high; some more tests are needed e.g. with R_ice : tuning parameter for sea ice albedo from Delta-Eddingtonshortwave.

  16. Plan for the next six months: • Include the volume transport from Atlantic to Pacific side in fully coupled case. • Include and test 2km resolution version of the RASM with at least H comset. • Performed more tuning tests to get acceptable results. • Compare tuning results with measurement at least with RGPS measurements.

  17. AL3Albedo type = default (ahmax = 0.3m) - albedo is constant above this thickness ; shortwave='dEdd’; Cf=5.6

More Related