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Observations

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

Fully-Coupled

1990, 20th Cent, 1850, Prediction

 

 

 

ExperimentDescriptionInitializationDiagnostics
AtmosphereIceLandOcean
b40.1850.track1.1deg.006CCSM4 1850 control

Case Info.

atm diagice diaglnd dig

AMOC

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

Case Info.

atm diagice diaglnd dig

AMOC yrs 401-1000
AMOC yrs 401-1510

popdiagts

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

Case Info.

atm diagice diaglnd 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

ExperimentDescriptionInitializationDiagnostics
AtmosphereIceLandOcean
g40.000cesm1_1_beta01, G, CORE-II (1948-2007),
(see Danabasoglu et al 2013)
Levitus/PHCAtmice diag yrs 271-300Lnd

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/PHCAtmice diag yrs 236-260Lnd

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.CORE2.01cesm1_4_beta06, G, CORE-II (1958-2009)Levitus/PHCAtmIceLnd

popdiag yrs 236-260

popdiagts yrs 001-260 

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

ice diag yrs 001-260

Lnd

popdiag yrs 236-260

popdiagts yrs 001-260 

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

ice diag yrs 001-260

Lnd

popdiag yrs 236-260

popdiagts yrs 001-260 

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

ice diag yrs 001-260

Lnd

popdiag yrs 236-260

popdiagts yrs 001-260 

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

ice diag yrs 001-260

Lnd

popdiag yrs 236-260

popdiag yrs 392-416

popdiagts yrs 001-416

additional diag 

g14b6.JRA55.v11.C01cesm1_4_beta06, G, JRA55v1.1 (1958-2009) with 4-yr salinity restoringLevitus/PHCAtm

Ice

Lnd

popdiagts yrs 001-260

 

g14b6.JRA55.v11.C02cesm1_4_beta06, G, JRA55v1.1 (1958-2009) with 1-yr salinity restoringLevitus/PHCAtm

ice diag yrs 001-260

Lnd

popdiag yrs 288-312

popdiagts yrs 001-312

additional diag 

Semi-prognostic method experiments

ExperimentDescriptionInitializationDiagnostics
AtmosphereIceLandOcean
g12b8.103 branched from 0293-01-01 of g40.103Atmice diag yrs 308-312Lnd

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)

ExperimentDescriptionInitializationDiagnostics
AtmosphereIceLandOcean
REF

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

LENS 1850 controlAtm

Ice

LndOce
AMV+

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

LENS 1850 controlAtm

Ice

LndOce
AMV-

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

LENS 1850 controlAtm

Ice

LndOce

 

 

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

ExperimentDescriptionInitializationDiagnostics
AtmosphereIceLandOcean
REF

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

LENS 1850 controlAtm

Ice

LndOce
AMV+

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

LENS 1850 controlAtm

Ice

LndOce
3xAMV+

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

LENS 1850 controlAtm

Ice

LndOce

 

 

 

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

ExperimentDescriptionInitializationDiagnostics
AtmosphereIceLandOcean
REF

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

LENS 1850 controlAtm

Ice

LndOce
AMV+

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

LENS 1850 controlAtm

Ice

LndOce

 

 

 

 

Flow Field Correction Experiments

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

(see Greatbatch et al., 2004)

 

 

 

 

 

ExperimentDescriptionInitializationDiagnostics
AtmosphereIceLandOcean

g12b8.103

cesm1_2_beta08, G case.

CTR simulation

branched from 0293-01-01 of g40.103

Atm

Ice

LndOce

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

LndOce

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

LndOce

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

LndOce

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

LndOce

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

LndOce

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

LndOce

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

LndOce

NATL_FFC+tropic_REF  

cesm1_2_beta08, G case.

startup simulation

startup simulation

Atm

Ice

LndOce

NATL_FFC+tropic_10  

cesm1_2_beta08, G case.

startup simulation with SSH correction

(5-day timescale)

startup simulation

Atm

Ice

LndOce

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

LndOce

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

LndOce

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

LndOce

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

LndOce

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

LndOce

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

LndOce

NATL_FFC+tropic_REF  

cesm1_2_beta08, G case.

REF startup simulation.

startup simulation

Atm

Ice

LndOce

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

LndOce

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

LndOce

g12b8.103

cesm1_2_beta08, G case.

CTR simulation

branched from 0293-01-01 of g40.103

Atm

Ice

LndOce

b.e11.B1850C5CN.f09_g16.005  

cesm1_1_2_LENS, G case.

 

LENS PI control

Atm

Ice

LndOce

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

LndOce

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

LndOce

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

LndOce

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

LndOce

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

LndOce
 

 

 

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