The Design Document page provides a description of the algorithms, implementation and planned testing including unit, verification, validation and performance testing. Please read Step 1.3 Performance Expectations that explains feature documentation requirements from the performance group point of view.
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The new v1 capability will read in netCDF files containing ocean surface distributions of marine macromolecules (lipids, polysaccharides, and proteins) and produce
Requirements
Requirement 1: Calculation of marine organic emissions from offline fields produced from marine biogeochemistry models
Date last modified:
Contributors: Susannah Burrows, Scott Elliott (Unlicensed), Richard Easter (Unlicensed)
Each requirement is to be listed under a ”section” heading, as there will be a one-to-one correspondence between requirements, design, proposed implementation and testing. Requirements should not discuss technical software issues, but rather focus on model capability. To the extent possible, requirements should be relatively independent of each other, thus allowing a clean design solution, implementation and testing plan.
Algorithmic Formulations
Design solution 1a: Formulation of relationship between ocean surface organic concentrations and organic mass fraction of emitted sea spray aerosol
Date last modified:Dec 2014
Contributors: Susannah Burrows, Scott Elliott (Unlicensed), Phil Rasch (pnl.gov)
See Burrows et al., 2014, ACP.
Burrows, S. M., Ogunro, O., Frossard, A. A., Russell, L. M., Rasch, P. J., and Elliott, S. M.: A physically based framework for modeling the organic fractionation of sea spray aerosol from bubble film Langmuir equilibria, Atmos. Chem. Phys., 14, 13601-13629, doi:10.5194/acp-14-13601-2014, 2014.
Design solution 1b: Formulation of assumed relationships between marine organic mass fraction and particle size and mixing state
Date last modified: Aug 2015
Contributors: Susannah Burrows
Some initial testing is documented here: /wiki/spaces/ATM/pages/32374899.
For an initial implementation, organic mass fraction calculated according to Burrows et al (2014) will be assumed to apply directly to Aitken mode and accumulation mode aerosol. Emissions within MAM4 will be implemented as a default configuration, with all marine organics combined into a single species, adding 3 advected tracers to the MAM4 scheme. A switch/parameter will be implemented to control mixing state (internal/external) of accumulation mode emissions.
Design and Implementation
Implementation 1a: Implementation of Burrows et al. 2014 marine organic aerosol emissions with MAM9 aerosols
Date last modified: 09/15/2015
Contributors: Susannah Burrows, Richard Easter (Unlicensed), Xiaohong Liu (add your name to this list if it does not appear)
New emissions formulation will be implemented within seasalt_model.F90. Organic mass fraction of emitted aerosol will be calculated using static netCDF files describing the distribution of organic molecules in surface ocean water, provided as netCDF files. The distributions will be obtained from low-resolution ACME ocean BGC simulations if available; otherwise, older distributions from POP simulations will be used. Emitted aerosol mass and number will be added to modes 1 (accumulation), 2 (Aitken) and 4 (primary organic), and emitted sea salt mass will be reduced if appropriate (depending on mixing state).
Implementation 1b: Implementation of alternate marine organic aerosol emissions parameterizations
Date last modified: 09/15/2015
Contributors: Susannah Burrows (add your name to this list if it does not appear)
Planned Verification and Unit Testing
Verification and Unit Testing: short-desciption-of-testing-here
Date last modified:
Contributors: (add your name to this list if it does not appear)
How will XXX be tested? i.e. how will be we know when we have met requirement XXX. Will these unit tests be included in the ongoing going forward?
Planned Validation Testing
Validation Testing: short-desciption-of-testing-here
Date last modified:
Contributors: (add your name to this list if it does not appear)
How will XXX be tested? What observational or other dataset will be used? i.e. how will be we know when we have met requirement XXX. Will these unit tests be included in the ongoing going forward?
Planned Performance Testing
Performance Testing: short-desciption-of-testing-here
Date last modified:
Contributors: (add your name to this list if it does not appear)
How will XXX be tested? i.e. how will be we know when we have met requirement XXX. Will these unit tests be included in the ongoing going forward?
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