GEOS-Chem
GEOS-Chem High Performance (GCHP v11-02c): a next-generation implementation of the GEOS-Chem chemical transport model for massively parallel applications
... the GEOS-Chem CTM. GCHP uses an identical copy of the GEOS-Chem Classic (GCC) code to provide the same high-fidelity atmospheric chemical simulation capabilities, allowing users to switch ...
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Errors and improvements in the use of archived meteorological data for chemical transport modeling: an analysis using GEOS-Chem v11-01 driven by GEOS-5 meteorology
... of GEOS-Chem: the standard ver- sion 11-01 released in February 2017 ...standard GEOS-Chem operates on the rectilinear grid from the GEOS-5 archive, while GCHP operates on the ...
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An intercomparison of total column-averaged nitrous oxide between ground-based FTIR TCCON and NDACC measurements at seven sites and comparisons with the GEOS-Chem model
... Acknowledgements. Minqiang Zhou is supported by the Belgian complementary researchers program. We would like to thank TCCON and NDACC networks for making the data publicly available. The FTIR sites at Réunion are ...
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Estimating surface carbon fluxes based on a local ensemble transform Kalman filter with a short assimilation window and a long observation window: an observing system simulation experiment test in GEOS-Chem 10.1
... Inflation is very important for our LETKF_C data assimila- tion system. The LETKF uses the forecast ensemble spread to represent forecast uncertainties. All EnKFs tend to un- derestimate the uncertainty in their state ...
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Revised treatment of wet scavenging processes dramatically improves GEOS-Chem 12.0.0 simulations of surface nitric acid, nitrate, and ammonium over the United States
... in the US from 1.56 to 1.18 µg m −3 (observation: 1.30). The NMB is changed from 20 % to −9 %. The impacts of the updated wet scavenging parameterization on the concentra- tions of all major aerosols over the whole globe ...
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Development of a grid-independent GEOS-Chem chemical transport model (v9-02) as an atmospheric chemistry module for Earth system models
... 2012). GEOS-Chem is based on core principles of open-source code development, modular structure, nimble approach to innovation, strong version control, rigorous qual- ity assurance (QA), extensive ...
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Global simulation of tropospheric chemistry at 12.5 km resolution: performance and evaluation of the GEOS-Chem chemical module (v10-1) within the NASA GEOS Earth system model (GEOS-5 ESM)
... in GEOS, which adds a forcing term to the model equations, constrain- ing them to a specific trajectory to simulate the 2013–2014 meteorological year (Orbe et ...with GEOS-Chem turned off (“regular ...
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Global simulation of tropospheric chemistry at 12.5 km resolution : Performance and evaluation of the GEOS-Chem chemical module (v10-1) within the NASA GEOS Earth system model (GEOS-5 ESM)
... in GEOS, which adds a forcing term to the model equations, constrain- ing them to a specific trajectory to simulate the 2013–2014 meteorological year (Orbe et ...with GEOS-Chem turned off (“regular ...
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Global simulation of tropospheric chemistry at 12.5 km resolution : Performance and evaluation of the GEOS-Chem chemical module (v10-1) within the NASA GEOS Earth system model (GEOS-5 ESM)
... in GEOS, which adds a forcing term to the model equations, constrain- ing them to a specific trajectory to simulate the 2013–2014 meteorological year (Orbe et ...with GEOS-Chem turned off (“regular ...
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Retrievals of formaldehyde from ground-based FTIR and MAX-DOAS observations at the Jungfraujoch station and comparisons with GEOS-Chem and IMAGES model simulations
... Abstract. As an ubiquitous product of the oxidation of many volatile organic compounds (VOCs), formaldehyde (HCHO) plays a key role as a short-lived and reactive intermedi- ate in the atmospheric photo-oxidation pathways ...
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Systematic bias in evaluating chemical transport models with maximum daily 8 h average (MDA8) surface ozone for air quality applications: a case study with GEOS-Chem v9.02
... for air quality applications: (1) vertical mismatch between the lowest model level and the altitude of the observations, (2) insufficient vertical stratification and/or ozone loss (e.g., non-stomatal dry deposition ...
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A simplified parameterization of isoprene-epoxydiol-derived secondary organic aerosol (IEPOX-SOA) for global chemistry and climate models: a case study with GEOS-Chem v11-02-rc
... Standard GEOS-Chem assumes no organic coating, only the surface area of inorganic ...for GEOS- Chem v11-02-rc, because GEOS-Chem does not take into ac- count organic aerosol mass ...
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Improved method for linear carbon monoxide simulation and source attribution in atmospheric chemistry models illustrated using GEOS-Chem v9
... We also fixed a few minor problems in the v9-01-03 CO- only simulations to bring them up to date with the current public version (v11-01) and to make them more compatible with the full chemistry simulation. Specifically, ...
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Application of random forest regression to the calculation of gas-phase chemistry within the GEOS-Chem chemistry model v10
... All model simulations were performed using the NASA God- dard Earth Observing System Model, version 5 (GEOS- 5) with version 10 of the GEOS-Chem chemistry embed- ded (Long et al., 2015; Hu et al., ...
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Application of random forest regression to the calculation of gas-phase chemistry within the GEOS-Chem chemistry model v10
... All model simulations were performed using the NASA God- dard Earth Observing System Model, version 5 (GEOS- 5) with version 10 of the GEOS-Chem chemistry embed- ded (Long et al., 2015; Hu et al., ...
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Assessing remote polarimetric measurement sensitivities to aerosol emissions using the geos-chem adjoint model
... Molecular light scattering is calculated using applications of Rayleigh scattering theory as implemented by Bodhaine et al. (1999). Refractive indices, depolarization ratios, and light scattering cross sections of air ...
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Sensitivity of chemistry-transport model simulations to the duration of chemical and transport operators: a case study with GEOS-Chem v10-01
... Advection is based on the multi-dimensional flux-form semi-Lagrangian advection scheme (Lin and Rood, 1996; Lin et al., 1994), with an additional pressure-fixer algorithm implemented for the conservation of species mass ...
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Global tropospheric effects of aromatic chemistry with the SAPRC-11 mechanism implemented in GEOS-Chem version 9-02
... in GEOS- Chem based on the State-wide Air Pollution Research Cen- ter version 11 (SAPRC-11) mechanism, and use the updated model to analyze the global- and regional-scale chemical ef- fects of the most ...
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Implementation and evaluation of an array of chemical solvers in the Global Chemical Transport Model GEOS-Chem
... the SMVGEARII integrator for each tolerance level. The results indicate that, for the same computational time, the KPP Rosenbrock integrators produce a more accurate solu- tion than the SMVGEARII integrator. The Sdirk ...
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Implementing marine organic aerosols into the GEOS-Chem model
... In addition to having MOAs with a range of atmospheric ages, optimal locations for future field campaigns should have concentrations greater than the detection limit of instru- mentation capable of routine monitoring ...
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