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Title: The terminator "toy" chemistry test: A simple tool to assess errors in transport schemes

Abstract

This test extends the evaluation of transport schemes from prescribed advection of inert scalars to reactive species. The test consists of transporting two interacting chemical species in the Nair and Lauritzen 2-D idealized flow field. The sources and sinks for these two species are given by a simple, but non-linear, "toy" chemistry that represents combination (X+X → X2) and dissociation (X2 → X+X). This chemistry mimics photolysis-driven conditions near the solar terminator, where strong gradients in the spatial distribution of the species develop near its edge. Despite the large spatial variations in each species, the weighted sum XT = X+2X2 should always be preserved at spatial scales at which molecular diffusion is excluded. The terminator test demonstrates how well the advection–transport scheme preserves linear correlations. Chemistry–transport (physics–dynamics) coupling can also be studied with this test. Examples of the consequences of this test are shown for illustration.

Authors:
 [1];  [1];  [1];  [1];  [2]
  1. National Center for Atmospheric Research, Boulder, CO (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1214222
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Accepted Manuscript
Journal Name:
Geoscientific Model Development (Online)
Additional Journal Information:
Journal Name: Geoscientific Model Development (Online); Journal Volume: 8; Journal Issue: 5; Journal ID: ISSN 1991-9603
Publisher:
European Geosciences Union
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES

Citation Formats

Lauritzen, P. H., Conley, A. J., Lamarque, J. -F., Vitt, F., and Taylor, M. A. The terminator "toy" chemistry test: A simple tool to assess errors in transport schemes. United States: N. p., 2015. Web. doi:10.5194/gmd-8-1299-2015.
Lauritzen, P. H., Conley, A. J., Lamarque, J. -F., Vitt, F., & Taylor, M. A. The terminator "toy" chemistry test: A simple tool to assess errors in transport schemes. United States. https://doi.org/10.5194/gmd-8-1299-2015
Lauritzen, P. H., Conley, A. J., Lamarque, J. -F., Vitt, F., and Taylor, M. A. Mon . "The terminator "toy" chemistry test: A simple tool to assess errors in transport schemes". United States. https://doi.org/10.5194/gmd-8-1299-2015. https://www.osti.gov/servlets/purl/1214222.
@article{osti_1214222,
title = {The terminator "toy" chemistry test: A simple tool to assess errors in transport schemes},
author = {Lauritzen, P. H. and Conley, A. J. and Lamarque, J. -F. and Vitt, F. and Taylor, M. A.},
abstractNote = {This test extends the evaluation of transport schemes from prescribed advection of inert scalars to reactive species. The test consists of transporting two interacting chemical species in the Nair and Lauritzen 2-D idealized flow field. The sources and sinks for these two species are given by a simple, but non-linear, "toy" chemistry that represents combination (X+X → X2) and dissociation (X2 → X+X). This chemistry mimics photolysis-driven conditions near the solar terminator, where strong gradients in the spatial distribution of the species develop near its edge. Despite the large spatial variations in each species, the weighted sum XT = X+2X2 should always be preserved at spatial scales at which molecular diffusion is excluded. The terminator test demonstrates how well the advection–transport scheme preserves linear correlations. Chemistry–transport (physics–dynamics) coupling can also be studied with this test. Examples of the consequences of this test are shown for illustration.},
doi = {10.5194/gmd-8-1299-2015},
journal = {Geoscientific Model Development (Online)},
number = 5,
volume = 8,
place = {United States},
year = {Mon May 04 00:00:00 EDT 2015},
month = {Mon May 04 00:00:00 EDT 2015}
}

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