Energy Dissipation Rates Project

Explanation of Potential and Kinetic Energy

Exploring the wind work term

Model Results

CCSM (details)

Alpha calculation

Spectral Analysis

GFDL (details)

Alpha calculation

Spectral Analysis

W data

E data

Hadcm3 (details)

Hadcm3

Spectral Analysis

Miroc (details)

Miroc Alpha

Spectral Analysis

MOM4 (details)

Alpha calculation

Spectral Analysis

ORCA (details)

Alpha calculation

SODA (details)

Alpha calculation

References

Fedorov, A.V. Estimating net energy dissipation rates in the tropical ocean: diabatic effects on ENSO dynamics. Accepted by J. Climate with minor revisions.

Goddard L. and Philander S.G. (2000) The Energetics of El Niño and La Niña. Journal of Climate. P 1496

Model Details

Model Institution

CCSM3 NCAR (USA)

GFDL-CM2.0or2.1? GFDL (USA)

MIROC3.2(hires) CCSR/NIES/FRCGC (Japan)

UKMO – HadCM3 Hadley Centre (UK)

MOM4 GFDL (USA)

POP – ocean only NCAR (USA)

Table 1.

CCSM

Hadcm3

Directory: alphacalculations/original_datafiles/IPCC/Hadcm3

IPCC Climate of the 20^th Century Run.

Variables: rhopoto, tauu, ua, tos.

Resolution: monthly. Starts at 1900

Coupled model.

Ocean friction: In the mixed layer a K-theory scheme is used. (P&P 81) Below the upper layers the vertical diffusivity is an increasing function of depth only.

Horiz. Resolution: 1.25*1.25 in ocean, 2.5*3.75 in atmosphere.

Model details: www.metoffice.com/research/hadleycentre/models/HadCM3.html, Pope et al (2000), Gordon et al (2000)

GFDL

IPCC run.

http://nomads.gfdl.noaa.gov/dods-data/gfdl_cm2_1/

pp/ocean/static/tripolar

CM2.1U-D4_1860-2000-AllForc_H1

Miroc3_2_hires from IPCC run

Directory: alphacalculations/original_datafiles/IPCC/miroc3_2_hires

Coupled Model

Horizontal resolution: Atmos - T106 spectral truncation, approximately equivalent to 1.125° long-lat grid. Ocean – 0.28125 zonally and 0.1875 meridionally.

Lateral mixing of momentum – Smagorinsky’s biharmonic viscosity.

Mom4ocean from GFDL

43 years from an ocean only model forced by observed wind-stress and surface fluxes.

Directory: alphacalculations/original_datafiles/mom4ocean

Large datafiles stored in /extra/jb842/store_full_mom4data as have to be <4Gig to be on external hard drive.

Region:

Pot_rho: x=119.5e:84.5w, y=15.19s:15.19n, k=1:30 or to 446.9m.

U & tau_x: x=120e:85w, y=15.56s:15.56n, k=1:30 or to 446.9m.

Density at the surface for t=1. Showing region for integration.

Resolution: Monthly.

Time: Jan 1, 1958 – Dec 31, 2000.

Source: Downloaded from Princeton. Directory from John Dunne /archive/jpd/lima/mom4_om3_43yearloop_new_sw/pp/ocean/ts/monthly/43yr/

John Dunne: jpd@gfdl.noaa.gov

Files – pot_rho.nc, temp.nc, tau_x.nc, u.nc tau_y.nc, v.nc

Find out: what windstress and surface fluxes were used? Have emailed John to find this out.

Calculations:

Rho_star

SODA

Data from IRI website: http://ingrid.ldeo.columbia.edu/SOURCES/.CARTON-GIESE/SODA/.v1p4p2/

Region x=119.25e:80.25W, y=30.25s:30.25n, k=1:19, time=Jan 58 to Dec 2001. Can get later data till 2004.

getdata.jnl – ferret file to save data sets from web.