This is an obsolete content ! please visit my Ifremer page for last update
North Atlantic
Here are some comparisons between the outputs from the ECCO2-MITgcm ll2.nb.01 simulation (lat-lon 1/8 global) and observations from Levitus 94 and the SST from AMSR-E satellite data. We focus on the temperature and salinity fields.
MODEL: monthly climatology from Jun./2002 to Mar./2005 of THETA (monthly averaged available here)
DATA: monthly climatology of SST from the TMI + AMSR-E OI product (limited to Jun./2002 to Mar./2005)
DATA2: monthly climatology of Levitus 94 (THETA)
Surface THETA, yearly mean
MODEL vs Levitus94
MODEL vs AMSR-E
MODEL
Levitus94
AMSR-E
Surface THETA, Jan-Feb-Mar mean
MODEL vs Levitus94
MODEL vs AMSR-E
MODEL
Levitus94
AMSR-E
Monthly surface fraction of each outcrops over the North Atlantic Ocean (%)
Model (lle.nb.01) vs Levitus94, THETA, meridional sections, Jan-Feb-Mar mean:
Over the bassin
290E:10:340E
focus on 300E
(model: red, data: black dashed)
Global
Monthly climatology
Surface THETA
monthly climatology
lle.nb.01 vs Levitus94
Surface salinity
monthly climatology
lle.nb.01 vs Levitus94
Dec->May
SST seasonal cycle from
MODEL (left) and Levitus94 (right)
(monthly clim. minus year mean)
Dec->May
SSS seasonal cycle from
MODEL (left) and Levitus94 (right)
(monthly clim. minus year mean)
Jun->Nov
SST seasonal cycle from
MODEL (left) and Levitus94 (right)
(monthly clim. minus year mean)
SSS seasonal cycle from
MODEL (left) and Levitus94 (right)
(monthly clim. minus year mean)
North atlantic
Monthly volume time series
- Here is a list of plots showing volume time series of each potential temperature classes. Fields analysed are monthly means and the domain goes from:
longitude: [276.0625 359.9375]
latitude: [12.0975 53.2011]
depth: [5 1.0072e+03]
RQ: The volume corresponds to the amount of water having a temperature between T-0.5 and T+0.5.
THETA class (deg. C) = [-2; -1; 0; 1; 2; 3; 4; 5; 6; 7; 8; 9; 10; 11; 12; 13; 14; 15; 16; 17; 18; 19; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 40]
- Heat content of the domain: H(t) = sum_T: V(T,t)*RHO(T,S=35)*Cp*T
Monthly volume time series: CUBE49 vs ECCO-GODDAE
- Comparison with the ECCO-GODAE solution: Adjoint 1x1 grid iteration 199 (real month averages, allow freezing of water at surface)
Legend: blue: the cube49, red: iter199
RQ: To avoid systematic errors due to grid and fields resolutions, we only plot the fraction of the domain volume for each THETA class
THETA class (deg. C) = [-2;-1;0; 1; 2; 3; 4; 5; 6; 7; 8; 9; 10; 11; 12; 13; 14; 15; 16; 17; 18; 19; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 40] - Heat content of the domain: H(t) = sum_T: V(T,t)*RHO(T,S=35)*Cp*T
RQ: The red line is the rough computation of the H for the iter199 solution. But differences in grid resolution (1 vs 1/4) makes the total volume in iter199 bigger than in cube49. So the magenta line is the iter199 solution with a rectified total volume to match the cube49 one.
Last, an average temperature difference between years [n-1:n] and [1:2] is computed as: dT = dH / Cp / Vtot / RHO_0
Surface THETA, yearly mean
Surface THETA, Jan-Feb-Mar
CUBE49 vs Levitus94, Meridional sections, JFM mean. (compair with lat-lon 1/8 run here)
North atlantic
Monthly volume time series
- Here is a list of plots showing volume time series of each potential temperature classes. Fields analysed are monthly means and the domain goes from:
longitude: [276.0625 359.9375]
latitude: [12.0975 53.2011]
depth: [5 1.0072e+03]
RQ: The volume corresponds to the amount of water having a temperature between T-0.5 and T+0.5.
THETA class (deg. C) = [-2; -1; 0; 1; 2; 3; 4; 5; 6; 7; 8; 9; 10; 11; 12; 13; 14; 15; 16; 17; 18; 19; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 40]
- Heat content of the domain: H(t) = sum_T: V(T,t)*RHO(T,S=35)*Cp*T
And here is a detailed view of the both Volume and Heat content: