The description and validation of the computationally Efficient CH<sub>4</sub>–CO–OH (ECCOHv1.01) chemistry module for 3-D model applications
We present the Efficient CH<sub>4</sub>–CO–OH (ECCOH) chemistry module that allows for the simulation of the methane, carbon monoxide, and hydroxyl radical (CH<sub>4</sub>–CO–OH) system, within a chemistry climate model, carbon cycle model, or Earth system model. The computat...
Main Authors: | , , , , |
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Format: | Article |
Language: | English |
Published: |
Copernicus Publications
2016-02-01
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Series: | Geoscientific Model Development |
Online Access: | http://www.geosci-model-dev.net/9/799/2016/gmd-9-799-2016.pdf |
Summary: | We present the Efficient CH<sub>4</sub>–CO–OH (ECCOH) chemistry
module that allows for the simulation of the methane, carbon monoxide, and
hydroxyl radical (CH<sub>4</sub>–CO–OH) system, within a chemistry climate model,
carbon cycle model, or Earth system model. The computational efficiency of
the module allows many multi-decadal sensitivity simulations of the
CH<sub>4</sub>–CO–OH system, which primarily determines the global atmospheric
oxidizing capacity. This capability is important for capturing the nonlinear
feedbacks of the CH<sub>4</sub>–CO–OH system and understanding the perturbations
to methane, CO, and OH, and the concomitant impacts on climate. We
implemented the ECCOH chemistry module in the NASA GEOS-5 atmospheric global
circulation model (AGCM), performed multiple sensitivity simulations of the
CH<sub>4</sub>–CO–OH system over 2 decades, and evaluated the model output with
surface and satellite data sets of methane and CO. The favorable comparison
of output from the ECCOH chemistry module (as configured in the GEOS-5 AGCM)
with observations demonstrates the fidelity of the module for use in
scientific research. |
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ISSN: | 1991-959X 1991-9603 |