Sensitivity experiments of radiation for Earth atmosphere condition

Overview

An experiment with climatological boundary condition and forcing.

Model

• dcpam5-20160612

• A following option is given at compilation
  • -DSLTT2D1DMONOTONIC

Common setting

• Primive eqaution system
• Semi-Lagrangian transport / spectral transport of water vapor and cloud water and ice
• Radiation model
  • Earth radiation model
  • Simple radiation model
    • Absorption by water vapor
    • Absorption by non-condensible gas
    • Rayleigh scattering
• Turbulent mixing (Mellor and Yamada (1982) level 2.5)
• Surface flux (Beljaars and Holtslag, 1991)
• Simple land model (bucket model, subsurface heat conduction)
• Relaxed Arakawa-Schubert cumulus parameterization (Moorthi and Suarez, 1992) with including ice phase
• Non convective condensation (Le Treut and Li, 1991) with including ice phase
• Convective adjustment (e.g., Manabe et al., 1965)
• Simple cloud model (turbulent mixing, production by condensation, loss with constant lifetime, evaporation)
• Gravity wave drag
• Resolution: T21L26
• Used data
  • Topography (ETOPO1), land use (Matthews, 1983, 1984, 1985)
  • Sea surface temperature (climatology of AMIPII boundary condtion)
  • Sea ice density (climatology of AMIPII boundary condition)
  • Ozone distribution (zonal mean value of CMIP5 climatology)
• Integration time: 3 years

Individual setting and results

• 00: DCPAM "full model"
• 01-0?: Sensitivity experiments using DCPAM radiation model
• 11-1?: Sensitivity experiments using grey radiation model

00) An experiment with DCPAM

• Individual setting
  • DCPAM radiation model
• namelist files are below
  • Initial condition (atmosphere)
  • Initial condition (surface)
  • Execution
• Result
  • Result at 3rd year

01) An experiment with DCPAM without CH4 and N2O

• Individual setting
  • DCPAM radiation model
  • No CH4
  • No N2O
• namelist files are below
  • Initial condition (atmosphere)
  • Initial condition (surface)
  • Execution
• Result
  • Result at 3rd year

02) An experiment with DCPAM radiation without cloud

• Individual setting
  • DCPAM radiation model
  • No cloud
• namelist files are below
  • Initial condition (atmosphere)
  • Initial condition (surface)
  • Execution
• Result
  • Result at 3rd year

03) An experiment with DCPAM radiation without O3

• Individual setting
  • DCPAM radiation model
  • No O3
• namelist files are below
  • Initial condition (atmosphere)
  • Initial condition (surface)
  • Execution
• Result
  • Result at 3rd year

04) An experiment with DCPAM radiation without O3 and cloud

• Individual setting
  • DCPAM radiation model
  • No O3
  • No cloud
• namelist files are below
  • Initial condition (atmosphere)
  • Initial condition (surface)
  • Execution
• Result
  • Result at 3rd year

11) An experiment with radiation by water vapor only

• Individual setting
  • absorption coefficient of water vapor 1e-2 m2 kg-1
• namelist files are below
  • Initial condition (atmosphere)
  • Initial condition (surface)
  • Execution
• Result
  • Result at 3rd year

12) An experiment with radiation by water vapor only

• Individual setting
  • absorption coefficient of water vapor 1e-2 m2 kg-1
  • spectral advection
• namelist files are below
  • Initial condition (atmosphere)
  • Initial condition (surface)
  • Execution
• Result
  • Result at 3rd year

13) An experiment with radiation by water vapor and non-condensible gas

• Individual setting
  • absorption coefficient of water vapor 1e-2 m2 kg-1
  • absorption coefficient of non-condensible gas 1e-6 m2 kg-1
• namelist files are below
  • Initial condition (atmosphere)
  • Initial condition (surface)
  • Execution
• Result
  • Result at 3rd year

14) An experiment with radiation by water vapor and non-condensible gas

• Individual setting
  • absorption coefficient of water vapor 1e-2 m2 kg-1
  • absorption coefficient of non-condensible gas 1e-5 m2 kg-1
• namelist files are below
  • Initial condition (atmosphere)
  • Initial condition (surface)
  • Execution
• Result
  • Result at 3rd year

15) An experiment with radiation by water vapor and non-condensible gas

• Individual setting
  • absorption coefficient of water vapor 1e-2 m2 kg-1
  • absorption coefficient of non-condensible gas 1e-4 m2 kg-1
• namelist files are below
  • Initial condition (atmosphere)
  • Initial condition (surface)
  • Execution
• Result
  • Result at 3rd year

16) An experiment with radiation by water vapor and non-condensible gas

• Individual setting
  • absorption coefficient of water vapor 1e-2 m2 kg-1
  • absorption coefficient of non-condensible gas 1e-3 m2 kg-1
• namelist files are below
  • Initial condition (atmosphere)
  • Initial condition (surface)
  • Execution
• Result
  • Result at 3rd year

17) An experiment with radiation by water vapor and non-condensible gas

• Individual setting
  • absorption coefficient of water vapor 4e-2 m2 kg-1
  • absorption coefficient of non-condensible gas 2e-5 m2 kg-1
• namelist files are below
  • Initial condition (atmosphere)
  • Initial condition (surface)
  • Execution
• Result
  • Result at 3rd year

21) An experiment with radiation by water vapor and non-condensible gas with MCA

• Individual setting
  • absorption coefficient of water vapor 4e-2 m2 kg-1
  • absorption coefficient of non-condensible gas 2e-5 m2 kg-1
  • Moist convective adjustment
• namelist files are below
  • Initial condition (atmosphere)
  • Initial condition (surface)
  • Execution
• Result
  • Result at 3rd year

Examples of a visualization program/script

• Program and script