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Observations

Data Analysis
Merged SST (HadiSST 1870-1981; NCEP OI2 1981-2008) EOFs

Fully-Coupled

1990, 20th Cent, 1850, Prediction

 

 

 

Experiment Description Initialization Diagnostics
Atmosphere Ice Land Ocean
b40.1850.track1.1deg.006 CCSM4 1850 control

Case Info.

atm diag ice diag lnd dig

AMOC

b.e11.B1850C5CN.f09_g16.005 Large-Ensemble 1850 control,
cesm1_1,CAM5 FV0.9, POP gx1v6

Case Info.

atm diag ice diag lnd dig

AMOC yrs 401-1000
AMOC yrs 401-1510

popdiagts

b.e11.B1850C5CN.f19_g16.008 Last Millennium 1850 control,
cesm1_1,CAM5 FV1.9, POP gx1v6

Case Info.

atm diag ice diag lnd dig

AMOC

popdiagts

multi-case comparisons

 

 

 

 

 

Experiment

Description

Initialization

Diagnostics

Atmosphere

Ice

Land

Ocean

Large Ensemble simulations

1 historical (1850-2005), 13 20thC (1920-2005), and 13 RCP8.5 simulations (2006-2080)

cesm1_1,CAM5 0.9x1.25 (f09), POP gx1v6

Large Ensemble experiments information

atm diag

ice diag

lnd dig

AMOC

Last Millennium simulations

2 controls (one 1850, one 850), 9 all forcing, 2 Greenhouse Gas, 2 Land Use Land Cover, 2 Orbital, 3 Solar Variability, 4 Volcanic simulations

cesm1_1,CAM5 1.9x2.5deg grid (f19), POP gx1v6

Case Info.

atm diag

ice diag

lnd dig

AMOC

amoc experiments

3 1-degree control runs (b.e11.B1850C5CN.f09_g16.005, amoc_lens_008, amoc_lens_009), 1 2-deg. atm, 1-deg. ocn. control run (b.e11.B1850C5CN.f19_g16.008) and 5 parameterization experiments (amoc_lens_001, amoc_lens_002, amoc_lens_003, amoc_lens_004, amoc_lens_006)

Case Info.

atm diag

ice diag

lnd dig

AMOC

parameterization experiments

paper preparation html

    

Experiment

Description

Initialization

Diagnostics

Atmosphere

Ice

Land

Ocean

amoc_lens_001

reduced background vertical mixing from 0.17 x 10-4 to 0.10 x 10-4 m^2/s

Case Info.

atm diag

ice diag yrs 902-1001 (diff. from amoc_lens_005)

lnd dig

AMOC

popdiagts

popdiag (yrs 902-1001):

N. Atlantic

Global

amoc_lens_002

reduced submesoscale length scale from 5 km to 3.33 km

Case Info.

atm diag

ice diag

lnd dig

AMOC

popdiagts

popdiag (yrs 902-1001):

N. Atlantic

Global

amoc_lens_003

increased deep values of isopycnal and thickness diffusivities from 300 to 600 m^2/s

Case Info.

atm diag

ice diag

lnd dig

AMOC

popdiagts

popdiag (yrs 902-1001):

N. Atlantic

Global

amoc_lens_004

reduced horizontal viscosities from 600 to 300 m^2/s

Case Info.

atm diag

ice diag

lnd dig

AMOC

popdiagts

popdiag (yrs 902-1001):

N. Atlantic

Global

amoc_lens_005

new control

Case Info.

atm diag

ice diag yrs 902-1001

lnd dig

AMOC

popdiagts

popdiag (yrs 1002-1101):

N. Atlantic

Global

amoc_lens_006

reduced isopycnal and thickness diffusivities from 3000 to 2000 m^2/s

Case Info.

atm diag

ice diag

lnd dig

AMOC

popdiagts

popdiag (yrs 904-1003):

N. Atlantic

Global

amoc_lens_008

control run ensemble member (different atm. initial conditions)

Case Info.

atm diag

ice diag

lnd dig

AMOC

popdiagts

popdiag (yrs 902-1001):

N. Atlantic

Global

amoc_lens_009

control run ensemble member (different atm. initial conditions)

Case Info.

atm diag

ice diag

lnd dig

AMOC

popdiagts

popdiag (yrs 902-1001):

N. Atlantic

Global

Coupled Ocean-Ice

Hindcast experiments (version history for JRA55-do)

Experiment Description Initialization Diagnostics
Atmosphere Ice Land Ocean
g40.000 cesm1_1_beta01, G, CORE-II (1948-2007),
(see Danabasoglu et al 2013)
Levitus/PHC Atm ice diag yrs 271-300 Lnd

popdiag yrs 271-300

popdiagts yrs 001-300

zonal mean pCFC year 287

 

g12b8.compo.5

cesm1_2_beta08, G, Compo (1948-2007)

Levitus/PHC

Atm

ice diag yrs 271-300

Lnd

popdiag yrs 271-300 

popdiagts yrs 001-300

zonal mean pCFC year 287

g122.compo.7

cesm1_2_beta08, G, Compo (1948-2007)

Levitus/PHC

Atm

ice diag yrs 271-300

Lnd

popdiag yrs 271-300 

popdiagts yrs 001-300

g14.20CRv2c.sp30

cesm1_4_beta06, G , 20CRv2c (1871-1900)

Levitus/PHC

Atm

ice diag yrs 121-150

ice diag yrs 271-300

Lnd

popdiag yrs 121-150

popdiag yrs 271-300

popdiagts yrs 001-150

popdiagts yrs 001-300

g14b6.20CRv2c.01

cesm1_4_beta06, G, 20CRv2c (1958-2009)

Levitus/PHC Atm ice diag yrs 236-260 Lnd

popdiag yrs 236-260

popdiagts yrs 001-260 

g14b6.20CRv2c.02

cesm1_4_beta06, G , 20CRv2c (1901-2009)

g14.20CRv2c.sp30  (yr 151)

sfwf_weak_restore = 0.092

Atm

ice diag yrs 236-259

Lnd

popdiag yrs 236-259

popdiagts yrs 151-259

popdiagts yrs 151-368

g14b6.20CRv2c.03

cesm1_4_beta06, G , 20CRv2c (1901-2009)

g14.20CRv2c.sp30  (yr 151)

sfwf_weak_restore = 0.0115

Atm

ice diag yrs 236-259

Lnd

popdiag yrs 236-259

popdiagts yrs 151-259

popdiagts yrs 151-368

g14b6.CORE2.01 cesm1_4_beta06, G, CORE-II (1958-2009) Levitus/PHC Atm Ice Lnd

popdiag yrs 236-260

popdiagts yrs 001-260 

g14b6.JRA55.01 cesm1_4_beta06, G, JRA55v0.2 (1958-2009) Levitus/PHC Atm

ice diag yrs 001-260

Lnd

popdiag yrs 236-260

popdiagts yrs 001-260 

g14b6.JRA55.02 cesm1_4_beta06, G, JRA55v0.3 (1958-2009) Levitus/PHC Atm

ice diag yrs 001-260

Lnd

popdiag yrs 236-260

popdiagts yrs 001-260 

g14b6.JRA55.03 cesm1_4_beta06, G, JRA55v0.4 (1958-2009) Levitus/PHC Atm

ice diag yrs 001-260

Lnd

popdiag yrs 236-260

popdiagts yrs 001-260 

g14b6.JRA55.04 cesm1_4_beta06, G, JRA55v0.7 (1958-2009) Levitus/PHC Atm

ice diag yrs 001-260

Lnd

popdiag yrs 236-260

popdiag yrs 392-416

popdiagts yrs 001-416

additional diag 

g14b6.JRA55.v11.C01 cesm1_4_beta06, G, JRA55v1.1 (1958-2009) with 4-yr salinity restoring Levitus/PHC Atm

Ice

Lnd

popdiagts yrs 001-260

 

g14b6.JRA55.v11.C02 cesm1_4_beta06, G, JRA55v1.1 (1958-2009) with 1-yr salinity restoring Levitus/PHC Atm

ice diag yrs 001-260

Lnd

popdiag yrs 288-312

popdiagts yrs 001-312

additional diag 

g20b06.CORE2.C02 cesm2_0_beta06, G, CORE-II (1958-2009) with 4-yr salinity restoring Levitus/PHC Atm

ice diag yrs 001-156

Lnd

popdiag yrs 137-156

popdiagts yrs 001-156


g20b06.CORE2.C03 cesm2_0_beta06, G, CORE-II (1958-2009) with 4-yr salinity restoring, no ocean current in flux computation Levitus/PHC Atm

ice diag yrs 001-156

Lnd

popdiag yrs 137-156

popdiagts yrs 001-156


g20b06.JRA55.v13.T01 cesm2_0_beta06, G, JRA55v1.3 (1958-2009) with 4-yr salinity restoring Levitus/PHC Atm

Ice

Lnd

popdiagts yrs 001-104


g20b06.JRA55.v13.T02 cesm2_0_beta06, G, JRA55v1.3 (1958-2009) with 4-yr salinity restoring, no ocean current in flux computation Levitus/PHC Atm

ice diag yrs 001-156

Lnd

popdiag yrs 137-156

popdiagts yrs 001-208



Semi-prognostic method experiments

Experiment Description Initialization Diagnostics
Atmosphere Ice Land Ocean
g12b8.103   branched from 0293-01-01 of g40.103 Atm ice diag yrs 308-312 Lnd

popdiagts yrs 308-312

popdiag yrs 308-312

 

g12b8.103.1


branched from 0293-01-01 of g40.103

Atm

ice diag yrs 308-312

Lnd

popdiag yrs 308-312

g12b8.103.2


branched from 0293-01-01 of g40.103

Atm

ice diag yrs 308-312

Lnd

popdiag yrs 308-312

g12b8.103.3


branched from 0293-01-01 of g40.103

Atm

ice diag yrs 308-312

Lnd

popdiag yrs 308-312

g12b8.103.4


branched from 0293-01-01 of g40.103

Atm

ice diag yrs 308-312

Lnd

popdiag yrs 308-312

g12b8.103.5


branched from 0293-01-01 of g40.103

Atm

ice diag yrs 308-312

Lnd

popdiag yrs 308-312

g12b8.103.6


branched from 0293-01-01 of g40.103

Atm

ice diag yrs 307-311

Lnd

popdiag yrs 308-311

 

 

 

 

AMV Experiments

AMV ensemble experiments (SST anomalies are imposed over the entire North Atlantic)

Experiment Description Initialization Diagnostics
Atmosphere Ice Land Ocean
REF

Large-Ensemble 1850 control,
cesm1_1_2,CAM5 FV0.9, POP gx1v6

LENS 1850 control Atm

Ice

Lnd Oce
AMV+

Large-Ensemble 1850 control,
cesm1_1_2,CAM5 FV0.9, POP gx1v6

LENS 1850 control Atm

Ice

Lnd Oce
AMV-

Large-Ensemble 1850 control,
cesm1_1_2,CAM5 FV0.9, POP gx1v6

LENS 1850 control Atm

Ice

Lnd Oce

 

 

AMV ensemble experiments (SST anomalies are imposed over the northern North Atlantic only)

Experiment Description Initialization Diagnostics
Atmosphere Ice Land Ocean
REF

Large-Ensemble 1850 control,
cesm1_1_2,CAM5 FV0.9, POP gx1v6

LENS 1850 control Atm

Ice

Lnd Oce
AMV+

Large-Ensemble 1850 control,
cesm1_1_2,CAM5 FV0.9, POP gx1v6

LENS 1850 control Atm

Ice

Lnd Oce
3xAMV+

Large-Ensemble 1850 control,
cesm1_1_2,CAM5 FV0.9, POP gx1v6

LENS 1850 control Atm

Ice

Lnd Oce

 

 

 

AMV ensemble experiments (SST anomalies are imposed over the tropical North Atlantic only)

Experiment Description Initialization Diagnostics
Atmosphere Ice Land Ocean
REF

Large-Ensemble 1850 control,
cesm1_1_2,CAM5 FV0.9, POP gx1v6

LENS 1850 control Atm

Ice

Lnd Oce
AMV+

Large-Ensemble 1850 control,
cesm1_1_2,CAM5 FV0.9, POP gx1v6

LENS 1850 control Atm

Ice

Lnd Oce

 

 

 

 

Flow Field Correction Experiments

implements the semi-prognostic method for adjusting the hydrostatic equation to correct for systematic error

(see Greatbatch et al., 2004)

 

 

 

 

 

Experiment Description Initialization Diagnostics
Atmosphere Ice Land Ocean

g12b8.103

cesm1_2_beta08, G case.

CTR simulation

branched from 0293-01-01 of g40.103

Atm

Ice

Lnd Oce

g12b8.103.3

cesm1_2_beta08, G case.

identical to g12b8.103 but implements semi-prognostic correction

(alpha = 0.5, applied full depth in NATL (>15N))

branched from 0293-01-01 of g40.103

Atm

Ice

Lnd Oce

g12b8.103.5

cesm1_2_beta08, G case.

identical to g12b8.103 but implements semi-prognostic correction

(alpha = 0.8, applied in NATL (>15N), only above 830m and excluding points within 2 grid points of land)

branched from 0293-01-01 of g40.103

Atm

Ice

Lnd Oce

NATL_FFC_alpha-1.0

 

cesm1_2_beta08, G case.

identical to g12b8.103 but implements semi-prognostic correction

(alpha = 1.0, applied in NATL (between 15N and 65N), only above 830m and excluding points within 1 grid points of land)

branched from 0293-01-01 of g40.103

Atm

Ice

Lnd Oce

NATL_FFC_alpha-1.0.2

 

cesm1_2_beta08, G case.

identical to g12b8.103 but implements semi-prognostic correction

(alpha = 1.0, applied in NATL (between 15N and 65N), only above 830m)

branched from 0293-01-01 of g40.103

Atm

Ice

Lnd Oce

NATL_FFC_alpha-1.0.3

 

cesm1_2_beta08, G case.

identical to g12b8.103 but implements semi-prognostic correction

(alpha = 1.0, applied in NATL (between 15N and 65N), only above 830m and excluding points within 2 grid points of land)

branched from 0293-01-01 of g40.103

Atm

Ice

Lnd Oce

NATL_FFC_alpha-0.8

  

cesm1_2_beta08, G case.

identical to g12b8.103 but implements semi-prognostic correction

(alpha = 0.8, applied in NATL (between 15N and 65N), over full-depth and excluding points within 2 grid points of land)

branched from 0293-01-01 of g40.103

Atm

Ice

Lnd Oce

NATL_FFC_NI_alpha-1.0

  

cesm1_2_beta08, G case.

identical to g12b8.103 but implements non-interactive semi-prognostic correction

Correction term was diagnose from experiment NATL_FFC_alpha-1.0.3

(alpha = 1.0, applied in NATL (between 15N and 65N), only above 830m and excluding points within 2 grid points of land)

branched from 0293-01-01 of g40.103

Atm

Ice

Lnd Oce

NATL_FFC+tropic_REF  

cesm1_2_beta08, G case.

startup simulation

startup simulation

Atm

Ice

Lnd Oce

NATL_FFC+tropic_10  

cesm1_2_beta08, G case.

startup simulation with SSH correction

(5-day timescale)

startup simulation

Atm

Ice

Lnd Oce

NATL_FFC+tropic_11  

cesm1_2_beta08, G case.

startup simulation with SSH correction and semi-prognostic correction

(5-day timescale and alpha = 1.0, applied in NATL (between 15N and 65N), only above 830m and excluding points within 2 grid points of land)

startup simulation

Atm

Ice

Lnd Oce

NATL_FFC+tropic_12  

cesm1_2_beta08, G case.

startup simulation with semi-prognostic correction

(alpha = 1.0, applied in NATL (between 15N and 65N), only above 830m and excluding points within 2 grid points of land)

startup simulation

Atm

Ice

Lnd Oce

NATL_FFC+tropic_13  

cesm1_2_beta08, G case.

startup simulation with SSH correction and semi-prognostic correction

(1-day timescale and alpha = 1.0, applied in NATL (between 15N and 65N), only above 830m and excluding points within 2 grid points of land)

startup simulation

Atm

Ice

Lnd Oce

NATL_FFC+tropic_14  

cesm1_2_beta08, G case.

startup simulation with SSH (filtered) correction and semi-prognostic correction

(5-day timescale and alpha = 1.0, applied in NATL (between 15N and 65N), only above 830m and excluding points within 2 grid points of land)

startup simulation

Atm

Ice

Lnd Oce

NATL_FFC+tropic_15  

cesm1_2_beta08, G case.

startup simulation with SSH (filtered) correction and semi-prognostic correction

(5-day timescale excluding points within 2 grid points of land and alpha = 1.0, applied in NATL (between 15N and 65N), only above 830m and excluding points within 2 grid points of land)

startup simulation

Atm

Ice

Lnd Oce

NATL_FFC+tropic_16  

cesm1_2_beta08, G case.

startup simulation with SSH (filtered) correction and semi-prognostic correction

(5-day timescale excluding points within 2 grid points of land and alpha = 1.0, applied in NATL (between 15N and 65N), only above 830m and excluding points within 2 grid points of land)

startup simulation

Atm

Ice

Lnd Oce

NATL_FFC+tropic_REF  

cesm1_2_beta08, G case.

REF startup simulation.

startup simulation

Atm

Ice

Lnd Oce

NATL_FFC+tropic_17  

cesm1_2_beta08, G case.

startup simulation with SSH (filtered) correction and semi-prognostic correction

(5-day timescale excluding points within 2 grid points of land and the GOM and alpha = 1.0, applied in NATL (between 15N and 65N), only above 830m and excluding points within 2 grid points of land)

startup simulation

Atm

Ice

Lnd Oce

NATL_FFC_NI_4  

cesm1_2_beta08, G case.

startup simulation with non-interactive semi-prognostic correction to hydrostatic eqn (dp/dz) and SSH (filtered) correction

Correction term was diagnose from experiment NATL_FFC+tropic_17

(5-day timescale (excluding points within 2 grid points of land and GOM) and alpha = 1, applied in N. Atlantic (between 15N and 65N), only above 830m and excluding
points within 2 grid points of land)

 

branched from 0293-01-01 of g40.103

Atm

Ice

Lnd Oce

g12b8.103

cesm1_2_beta08, G case.

CTR simulation

branched from 0293-01-01 of g40.103

Atm

Ice

Lnd Oce

b.e11.B1850C5CN.f09_g16.005  

cesm1_1_2_LENS, G case.

 

LENS PI control

Atm

Ice

Lnd Oce

B1850C5CN_NATL_FFC_2

 

cesm1_1_2_LENS, B case.

identical to b.e11.B1850C5CN.f09_g16.005 but implements semi-prognostic correction (alpha = 1.0, applied in NATL (between 15N and 65N), only above 830m and excluding points within 2 grid points of land and the GOM).

branched from 0402-01-01 of b.e11.B1850C5CN.f09_g16.005

Atm

Ice

Lnd Oce

B1850C5CN_NATL_FFC_3

 

cesm1_1_2_LENS, B case.

identical to b.e11.B1850C5CN.f09_g16.005 but implements semi-prognostic correction (alpha = 1.0, applied in NATL (between 15N and 65N), only above 830m and excluding points within 2 grid points of land and the GOM).

Sea ice change: dt_mlt_in = 1.5 (1.00), r_snw = 1.5 (1.75), rsnw_melt_in = 1500 (1000).


branched from 0402-01-01 of b.e11.B1850C5CN.f09_g16.005

Atm

Ice

Lnd Oce

B1850C5CN_NATL_FFC_4

 

cesm1_1_2_LENS, B case.

identical to b.e11.B1850C5CN.f09_g16.005 but implements SSH (filtered) correction and semi-prognostic correction

(5-day timescale excluding points within 2 grid points of land and the GOM and alpha = 1.0, applied in NATL (between 15N and 65N), only above 830m and excluding points within 2 grid points of land)

Sea ice change: dt_mlt_in = 1.5 (1.00), r_snw = 1.5 (1.75), rsnw_melt_in = 1500 (1000).

branched from 0402-01-01 of b.e11.B1850C5CN.f09_g16.005

Atm

Ice

Lnd Oce

B1850C5CN_NATL_FFC_5

 

cesm1_1_2_LENS, B case.

identical to b.e11.B1850C5CN.f09_g16.005 but with non-interactive semi-prognostic correction to hydrostatic eqn (dp/dz) correction

Correction term was diagnose from experiment B1850C5CN_NATL_FFC_3

(5-day timescale excluding points within 2 grid points of land and the GOM and alpha = 1.0, applied in NATL (between 15N and 65N), only above 830m and excluding points within 2 grid points of land)

Sea ice change: dt_mlt_in = 1.5 (1.00), r_snw = 1.5 (1.75), rsnw_melt_in = 1500 (1000).

branched from 0442-01-01 of B1850C5CN_NATL_FFC_3

Atm

Ice

Lnd Oce

B1850C5CN_NATL_FFC_6

 

cesm1_1_2_LENS, B case.

identical to b.e11.B1850C5CN.f09_g16.005 but with non-interactive semi-prognostic correction to hydrostatic eqn (dp/dz) correction

Correction term was diagnose from experiment B1850C5CN_NATL_FFC_3

(5-day timescale excluding points within 2 grid points of land and the GOM and alpha = 1.0, applied in NATL (between 15N and 65N), only above 830m and excluding points within 2 grid points of land)

Sea ice change: dt_mlt_in = 1.5 (1.00), r_snw = 1.0 (1.75), rsnw_melt_in = 2000 (1000), r_ice = -0.5 (0.0).

branched from 0482-01-01 of B1850C5CN_NATL_FFC_5

Atm

Ice

Lnd Oce
 

 

 

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