DOI: 10.5194/acp-6-3603-2006. Technical note: Implementation of prescribed (OFFLEM), calculated (ONLEM), and pseudo-emissions (TNUDGE) of chemical species in the Modular Earth Submodel System (MESSy)

Technical note: Implementation of prescribed (OFFLEM), calculated (ONLEM), and pseudo-emissions (TNUDGE) of chemical species in the Modular Earth Submodel System (MESSy)

10.5194/acp-6-3603-2006

Crossref journal-article

Copernicus GmbH

Atmospheric Chemistry and Physics (3145)

Abstract

Abstract. We present the submodels OFFLEM, ONLEM, and TNUDGE for the Modular Earth Submodel System (MESSy). Prescribed emissions from input files are handled by OFFLEM. ONLEM deals with online-calculated emissions, i.e., emissions that are calculated during the simulation. The submodel TNUDGE uses the "tracer nudging" technique for pseudo-sources and -sinks. For species with highly uncertain emission fluxes and/or with sufficiently long lifetimes, e.g., CH4, it is common to create such pseudo-fluxes by prescribing the observed mixing ratio of the species at a given boundary (e.g., the mixing ratio of methane at the surface, or the ozone mixing ratio at the tropopause). All three submodels substantially simplify the inclusion of emissions into a model. Specific emissions can easily be switched on or off. New prescribed emissions can be included without rewriting any code. New online emissions only require one additional subroutine containing the new parameterization. A major advantage is that input fields at arbitrary resolution can be used. The problem of incompatible grids between emission data and model is overcome by utilizing the MESSy data import interface. To further simplify the creation of new offline emission data, the preprocessing program EDGAR2NC is provided. EDGAR2NC transforms files from the EDGAR format into the netCDF format which is required by OFFLEM. The presented routines are a part of the community modeling project MESSy and can be made available for use to the atmospheric modeling community.

Bibliography

Kerkweg, A., Sander, R., Tost, H., & JÃ¶ckel, P. (2006). Technical note: Implementation of prescribed (OFFLEM), calculated (ONLEM), and pseudo-emissions (TNUDGE) of chemical species in the Modular Earth Submodel System (MESSy). Atmospheric Chemistry and Physics, 6(11), 3603â3609.

Authors 4

A. Kerkweg (first)
R. Sander (additional)
H. Tost (additional)
P. Jöckel (additional)

References 19 Referenced 192

Dates

Type	When
Created	15 years, 4 months ago (April 29, 2010, 9:49 a.m.)
Deposited	6 months, 1 week ago (Feb. 16, 2025, 4:26 a.m.)
Indexed	1 month, 3 weeks ago (July 2, 2025, 12:31 a.m.)
Issued	18 years, 11 months ago (Sept. 4, 2006)
Published	18 years, 11 months ago (Sept. 4, 2006)
Published Online	18 years, 11 months ago (Sept. 4, 2006)

Funders 0

None

BibTeX

@article{Kerkweg_2006, title={Technical note: Implementation of prescribed (OFFLEM), calculated (ONLEM), and pseudo-emissions (TNUDGE) of chemical species in the Modular Earth Submodel System (MESSy)}, volume={6}, ISSN={1680-7324}, url={http://dx.doi.org/10.5194/acp-6-3603-2006}, DOI={10.5194/acp-6-3603-2006}, number={11}, journal={Atmospheric Chemistry and Physics}, publisher={Copernicus GmbH}, author={Kerkweg, A. and Sander, R. and Tost, H. and Jöckel, P.}, year={2006}, month=sep, pages={3603–3609} }

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