Presentation is loading. Please wait.

Presentation is loading. Please wait.

CORE-II HYCOM Science application and test cases

Published byGillian Ward Modified over 9 years ago

Similar presentations

Presentation on theme: "CORE-II HYCOM Science application and test cases"— Presentation transcript:

1 CORE-II HYCOM Science application and test cases
Eric P. Chassignet and Alexandra Bozec

2 Science application and test case
In order to validate the code changes and to demonstrate the improvement on HYCOM, one needs to configure a scientifically useful case. HYCOM has been implemented as an ESPC ocean component in a standalone configuration on a Parallel Ocean Program (POP) glbx1v6 dipolar grid (320x384) grid and bathymetry. This configuration is a 1-degree climate case from the Community Earth System Model (CESM) also used by CICE in order to provide a direct comparison to simulations performed by the CESM model. Several routines of the HYCOM source code (v2.2.86) have been modified to include the proper reading of the CORE-II forcing and a new passive ice component has been added, based on the CESM DICE. Several 30-year runs of HYCOM have been performed with the CORE-II (Large and Yeager, 2009) normal year atmospheric fields to assess the sensitivity of the model to several parameters (reference pressure, thermobaricity, and isopycnal smoothing).

3 Set-up CCSM3-HYCOM: CORE-II Atmospheric forcing from 1948 to 2007 through the CCSM coupler (5 Cycles) Dipole POP gx1v3 grid Initialization from rest with Levitus PHC2.1 (POPx1v3 initial conditions) SSS-relaxation:4year/50m everywhere Normalization of the salt flux at the surface Bulk Formulation :Large and Yeager CSIM ice model FSU-HYCOM: CORE-II Atmospheric forcing from 1948 to 2007 (5 Cycles) Tripolar HYCOM GLBt0.72 grid Initialization from rest with Levitus PHC2.1 SSS-relaxation: 4year/50m everywhere except Antarctic at 6months/50m Bulk Formulation : Large and Yeager CICE ice model

4 Comparison of the grids
GLBt0.72 Comparison of the grids glbx1v6

5 Surface Biases CCSM3-HYCOM FSU-HYCOM TEMP BIAS SALINITY BIAS

6 Global Drifts Temperature Salinity CCSM3-HYCOM CCSM3-HYCOM
FSU-HYCOM New FSU-HYCOM

7 Atlantic Drifts Temperature Salinity CCSM3-HYCOM CCSM3-HYCOM
FSU-HYCOM New FSU-HYCOM

8 Overturning Streamfunction
CCSM-HYCOM Overturning Streamfunction FSU-HYCOM

9 Maximum Streamfunction at 26.5ºN

10 Atlantic heat transport

11 Mixed Layer depth MLD 0.125kg/m3 criterium in March average over , last cycle 0. 3.km POP-NCAR CCSM3-HYCOM New FSU-HYCOM

12 Drake Passage

13 March Mean Arctic Ice Thickness
POP-NCAR CCSM-HYCOM FSU-HYCOM Averaged over , cycle 5

14 HYCOM in CESM implementation
Goal #1: Produce a HYCOM stand-alone baseline run in a C-compset (use of DICE for the ice component) : based on 1º resolution grid from the POP gx1v6 grid (320x384), v of the HYCOM source Initial Conditions Levitus- PHC2 CORE atmospheric forcing Normal Year Ice component: DICE (new in HYCOM) Precipitation adjustment (new in HYCOM) Spatially varying SSS/SST relaxation For comparison purposes, POP-DICE has been run in its default setting for 30 years (data provided by Caroline Papadopoulos and Julie McClean)

15 SST & SSS bias after 30 years
POP REF-HYCOM POP REF-HYCOM

16 Evolution of Global T &S
With precip_adjust: Stabilization of S REF-POP: eq. to -3% of precip REF-HYCOM: -2% of precip

17 AMOC Strength REF-HYCOM AMOC is weaker (12Sv) than in POP (15 Sv).

18 Drake Passage transport
Biharmonic Gent-McWilliams more effective at maintaining transport

19 HYCOM in CESM implementation
Goal #2: Produce a HYCOM-CICE stand-alone baseline run in a G-compset : based on 1º resolution grid from the POP gx1v6 grid (320x384), v of the HYCOM source Initial Conditions Levitus- PHC2 CORE atmospheric forcing Normal Year Ice component: CICE v4.0 (initial condition: default ice cap provided by CICE) Precipitation adjustment Spatially varying SSS/SST relaxation Results are compared with HYCOM-DICE (REF-HYCOM)

20 Evolution of T & S, AMOC strength
HYCOM-CICE (black) REF-HYCOM (Yellow) HYCOM-CICE stabilizes before REF-HYCOM HYCOM-CICE (black) REF-HYCOM (yellow) HYCOM-CICE shows a stronger AMOC at 16Sv than REF-HYCOM (12sv)

21 HYCOM in CESM implementation
Produce a CESM-HYCOM baseline run in a G-compset : based on 1º resolution grid from the POP gx1v6 grid (320x384), v of the HYCOM source (for testing purposes) Initial Conditions Levitus- PHC2 CORE-II atmospheric forcing provided by DATM Ice component: CICE v4.0 (CESM version) (Ice initial condition: ice cap provided by CESM) Results to be compared with: CESM-POP HYCOM-CICE stand-alone

22 Comparison of the total heat and freshwater flux
Heat Flux Comparison of the total heat and freshwater flux (monthly mean Jan/ 1st year)

23 Questions?

24 Antarctic Ice Cover/Thickness
CCSM-HYCOM Old FSU-HYCOM New FSU-HYCOM

Download ppt "CORE-II HYCOM Science application and test cases"

Similar presentations

Basics of numerical oceanic and coupled modelling Antonio Navarra Istituto Nazionale di Geofisica e Vulcanologia Italy Simon Mason Scripps Institution.

Basics of numerical oceanic and coupled modelling Antonio Navarra Istituto Nazionale di Geofisica e Vulcanologia Italy Simon Mason Scripps Institution.
Computation of High-Resolution Global Ocean Model using Earth Simulator By Norikazu Nakashiki (CRIEPI) Yoshikatsu Yoshida (CRIEPI) Takaki Tsubono (CRIEPI)

Computation of High-Resolution Global Ocean Model using Earth Simulator By Norikazu Nakashiki (CRIEPI) Yoshikatsu Yoshida (CRIEPI) Takaki Tsubono (CRIEPI)
OCEAN-ONLY SIMULATIONS WITH CORE-II x2 NCOMx1 POP Forcing1958-19971958-2000 # of cycles43 Initial conditionsx3 spin-upLevitus T & S, state of rest Sea-iceSTR.

OCEAN-ONLY SIMULATIONS WITH CORE-II x2 NCOMx1 POP Forcing # of cycles43 Initial conditionsx3 spin-upLevitus T & S, state of rest Sea-iceSTR.
Experiments with Monthly Satellite Ocean Color Fields in a NCEP Operational Ocean Forecast System PI: Eric Bayler, NESDIS/STAR Co-I: David Behringer, NWS/NCEP/EMC/GCWMB.

Experiments with Monthly Satellite Ocean Color Fields in a NCEP Operational Ocean Forecast System PI: Eric Bayler, NESDIS/STAR Co-I: David Behringer, NWS/NCEP/EMC/GCWMB.
HYCOM and the need for overflow/entrainment parameterizations.

HYCOM and the need for overflow/entrainment parameterizations.
1 Evaluation of two global HYCOM 1/12º hindcasts in the Mediterranean Sea Cedric Sommen 1 In collaboration with Alexandra Bozec 2 and Eric Chassignet 2.

1 Evaluation of two global HYCOM 1/12º hindcasts in the Mediterranean Sea Cedric Sommen 1 In collaboration with Alexandra Bozec 2 and Eric Chassignet 2.
NEMO Modelling NSERC – CCAR Projects VITALS Geotraces

NEMO Modelling NSERC – CCAR Projects VITALS Geotraces
Effects of the Bering Strait closure on AMOC and global climate under different background climates DOE/UCAR Cooperative Agreement Regional and Global.

Effects of the Bering Strait closure on AMOC and global climate under different background climates DOE/UCAR Cooperative Agreement Regional and Global.
The Possible Influence of the NAO on the Mediterranean Outflow Water Path in the North Atlantic Alexandra Bozec1, Eric Chassignet1, George Halliwell2,

The Possible Influence of the NAO on the Mediterranean Outflow Water Path in the North Atlantic Alexandra Bozec1, Eric Chassignet1, George Halliwell2,
Role of the Southern Ocean in controlling the Atlantic meridional overturning circulation Igor Kamenkovich RSMAS, University of Miami, Miami RSMAS, University.

Role of the Southern Ocean in controlling the Atlantic meridional overturning circulation Igor Kamenkovich RSMAS, University of Miami, Miami RSMAS, University.
Dynamical Downscaling of CCSM Using WRF Yang Gao 1, Joshua S. Fu 1, Yun-Fat Lam 1, John Drake 1, Kate Evans 2 1 University of Tennessee, USA 2 Oak Ridge.

Dynamical Downscaling of CCSM Using WRF Yang Gao 1, Joshua S. Fu 1, Yun-Fat Lam 1, John Drake 1, Kate Evans 2 1 University of Tennessee, USA 2 Oak Ridge.
GEOS-5 AGCM for ISI Prediction Finite volume dynamical core (Lin, 2004) 1°x1.25°x72 layers Convection: Relaxed Arakawa-Schubert (Moorthi and Suarez, 1992)

GEOS-5 AGCM for ISI Prediction Finite volume dynamical core (Lin, 2004) 1°x1.25°x72 layers Convection: Relaxed Arakawa-Schubert (Moorthi and Suarez, 1992)
WRF-VIC: The Flux Coupling Approach L. Ruby Leung Pacific Northwest National Laboratory BioEarth Project Kickoff Meeting April 11-12, 2011 Pullman, WA.

WRF-VIC: The Flux Coupling Approach L. Ruby Leung Pacific Northwest National Laboratory BioEarth Project Kickoff Meeting April 11-12, 2011 Pullman, WA.
Basin-scale Ocean Prediction with the Hybrid Coordinate Ocean Model Eric P. Chassignet, Patrick J. Hogan, Harley E. Hurlburt, E. Joseph Metzger, and Alan.

Basin-scale Ocean Prediction with the Hybrid Coordinate Ocean Model Eric P. Chassignet, Patrick J. Hogan, Harley E. Hurlburt, E. Joseph Metzger, and Alan.
Thermohaline Circulation in the Coupled GISS/HYCOM Climate Simulation Shan Sun NASA/GISS Rainer Bleck Los Alamos National Laboratory.

Thermohaline Circulation in the Coupled GISS/HYCOM Climate Simulation Shan Sun NASA/GISS Rainer Bleck Los Alamos National Laboratory.
CESM/RACM/RASM Update May 15, 2012. Since Nov, 2011 ccsm4_0_racm28:racm29:racm30 – vic parallelization – vic netcdf files – vic coupling mods and “273.15”

CESM/RACM/RASM Update May 15, Since Nov, 2011 ccsm4_0_racm28:racm29:racm30 – vic parallelization – vic netcdf files – vic coupling mods and “273.15”
1.Introduction 2.Description of model 3.Experimental design 4.Ocean ciruculation on an aquaplanet represented in the model depth latitude depth latitude.

1.Introduction 2.Description of model 3.Experimental design 4.Ocean ciruculation on an aquaplanet represented in the model depth latitude depth latitude.
6-month Plan: May-Oct 2013 RASM 5 th Workshop Seattle 04/13 red == high priority tasks.

6-month Plan: May-Oct 2013 RASM 5 th Workshop Seattle 04/13 red == high priority tasks.
NOCS: NEMO activities in 2006 Preliminary tests of a full “LOBSTER” biogechemical model within the ORCA1 configuration. (6 extra passive tracers). Developed.

NOCS: NEMO activities in 2006 Preliminary tests of a full “LOBSTER” biogechemical model within the ORCA1 configuration. (6 extra passive tracers). Developed.
CCSM Simulations w/CORE Forcing Some preliminary results and a discussion of dataset issues Marika Holland With much input from Bill Large Steve Yeager.

CCSM Simulations w/CORE Forcing Some preliminary results and a discussion of dataset issues Marika Holland With much input from Bill Large Steve Yeager.

Similar presentations

Ads by Google