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Activity: CMIP5 Example
Experiment 1.1
Pre-Industrial Control
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Description from “Summary of Experiments for CMIP5” Document
Specified non-evolving, pre-industrial conditions which may include:
Prescribed atmospheric concentrations of
all well-mixed gases (including CO2)
some short-lived (reactive) species?
Prescribed non-evolving emissions or concentrations of
natural aerosols or their precursors including, possibly, an average background volcanic aerosol
some short-lived species
Unperturbed land use
Other gasses eg ozone might be prescribed but perhaps as a function of altitude, latitude, and month of the year (eg seasonally varying) In some models reactive species might be calculated with simple chemistry models while in others they might be prescribed. The same may be true of aerosol species.
Number of years = 500 (after spin-up period) length should be long enough to extend to the end of each perturbation experiment that is spawned from it.
Purpose and key diagnostics:
Serve as baseline for analysis of historical and future scenario runs with prescribed concentrations
Estimate unforced variability of the model
Diagnose drift in the unforced system
Provide initial conditions for some of the other experiments
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MIP: CMIP5
Project: CMIP5
Activity: Model Evaluation
Experiment: Pre-Industrial controlDescription: Control simulation representative of conditions in the 1850sDuration: Date Range: 1850-1850Duration: Length: 500 years
Why: Serve as baseline for analysis of historical and future scenario runs with prescribed concentrations
Why: Estimate unforced variability of the modelWhy: Diagnose drift in the unforced systemWhy: Provide initial conditions for some of the other experiments
Numerical Experiment: 1.1 Pre-Industrial ControlCalendar Type: perpetual period
Calendar Type: 360 day Required Duration: closed date range: 1850-1850 Required Duration: 500 years after spin-up period
Numerical Requirement:Control: YesDescription: prescribed concentration of atmospheric trace gasses and
aerosols representative of 1850sID: abcdefgh
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Boundary Condition:atmospheric concentration of well mixed gas ABoundary Condition:
atmospheric concentration of well mixed gas BBoundary Condition:atmospheric concentration of short lived reactive species CBoundary Condition:
atmospheric concentration of short lived reactive species DBoundary Condition:
atmospheric concentration of natural aerosol precursor EBoundary Condition:
atmospheric concentration of natural aerosol precursor FBoundary Condition:
atmospheric concentration of average volcanic aerosolBoundary Condition:
atmospheric concentration of short lived species GBoundary Condition:
land use: Unperturbed
Spatio-Temporal Constraint: Annual VariationSpatio-Temporal Constraint: Latitudinal Variation Spatio-Temporal Constraint: Altitude Variation
Initial Condition: Input from existing pre-industrial control simulation X
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Numerical Activity:Simulation:
Run Name: abcdeDescription: Pre-Industrial ControlDuration: 1850-1850Duration: 550 yearsOutput: Duration: 0-550Output: Time average: Year (12 months)Output: Time average: Season (3 months)Output: Time average: Month (1 month)Platform: computing environment: HPCxRestart Dumps: 51 (every 10 years)Spin-Up length: 50 yearsSimulation Collection: azaaa, azbbb, azccc
Simulation:Run Name: azaaaDescription: Pre-Industrial ControlDuration: 1850-1850Duration: 50 yearsOutput: Duration: 0-50Output: Time average: Year (12 months)Output: Time average: Season (3 months)Output: Time average: Month (1 month)Platform: computing environment: HPCxRestart Dumps: 5 (every 10 years)Spin-Up length: 50 yearsSimulation Collection: azaaa, azbbb, azccc
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Simulation:Run Name: azbbbDescription: Pre-Industrial ControlDuration: 1850-1850Duration: 150 yearsOutput: Duration: 50-150Output: Time average: Year (12 months)Output: Time average: Season (3 months)Output: Time average: Month (1 month)Platform: computing environment: HPCxRestart Dumps: 10 (every 10 years)Spin-Up length: 50 yearsSimulation Collection: azaaa, azbbb, azccc
Simulation:Run Name: azcccDescription: Pre-Industrial ControlDuration: 1850-1850Duration: 200 yearsOutput: Duration: 100-200Output: Time average: Year (12 months)Output: Time average: Season (3 months)Output: Time average: Month (1 month)Platform: computing environment: HPCxRestart Dumps: 10 (every 10 years)Spin-Up length: 50 yearsSimulation Collection: azaaa, azbbb, azccc
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Conformance:Conformance to Boundary Condition:
atmospheric concentration of well mixed gas A: data file aConformance to Boundary Condition:
atmospheric concentration of well mixed gas B: data file bConformance to Boundary Condition:
atmospheric concentration of short lived reactive species C: internal calculationConformance to Boundary Condition:
atmospheric concentration of short lived reactive species D: internal calculationConformance to Boundary Condition:
atmospheric concentration of natural aerosol precursor E: data file eConformance to Boundary Condition:
atmospheric concentration of natural aerosol precursor F: data file fConformance to Boundary Condition:
atmospheric concentration of average volcanic aerosol: data file vConformance to Boundary Condition:
atmospheric concentration of short lived species G: data file gConformance to Boundary Condition:
land use: Unperturbed: data file hConfigured Model component: Atmosphere
Configured Model component: AdvectionConfigured Model component: RadiationConfigured Model component: ConvectionConfigured Model component: Gravity Waves
Configured Model component: OceanConfigured Model component: Chemistry Configured Model: HadGEM1