The Chemistry Climate Model ECHAM6.3-HAM2.3-MOZ1.0

Schultz, Martin; Stadtler, Scarlet; Schröder, Sabine; Taraborrelli, Domenico; Franco, Bruno; Krefting, Jonathan; Henrot, Alexandra; Ferrachat, Sylvaine; Lohmann, Ulrike; Neubauer, David; Drian, Colombe Siegenthaler-Le; Wahl, Sebastian; Kokkola, Harri; Kühn, Thomas; Rast, Sebastian; Schmidt, Hauke; Stier, Philip; Kinnison, D. E.; Tyndall, Geoffrey S.; Wespes, Catherine

doi:10.5194/gmd-2017-191

Cited by 6 publications

(13 citation statements)

References 19 publications

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“…The sulfur chemistry in HAM2 is based on Feichter et al (1996) phase chemistry is distributed to pre-existing particles in the soluble accumulation and coarse modes. For the HAMMOZ setup the sulfur oxidants are computed online taking into account the full atmospheric chemistry processes described by MOZ, see Schultz et al (2017).…”

Section: Sulfur Chemistrymentioning

confidence: 99%

“…In the HAMMOZ configuration, the secondary volatile organic carbon emissions serving as precursors for secondary organic 5 aerosol (SOA) formation are calculated with an implementation of the MEGAN2.1 model (Guenther et al, 2012;Henrot et al, 2017). dust emission calculations in potential source areas.…”

mentioning

confidence: 99%

“…A new sea salt aerosol emission scheme was implemented that includes a temperature dependence of sea salt emission fluxes. The aerosol model can be used in combination with the 15 chemistry module in the ECHAM-HAMMOZ setup(Schultz et al, 2017) or with a simplified sulfur chemistry, which is evaluated in this publication. The alternative aerosol setup with the sectional aerosol scheme ECHAM6.3-HAM2.3-SALSA was evaluated byKokkola et al (2018).…”

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confidence: 99%

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Tegen¹

2019

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We introduce and evaluate the aerosol simulations with the global aerosol-climate model ECHAM6.3-HAM2.3, which is the aerosol component of the fully coupled aerosol-chemistry-climate model ECHAM-HAMMOZ. Both the host atmospheric climate model ECHAM6.3 and the aerosol model HAM2.3 were updated from previous versions. The updated version of the HAM aerosol model contains improved parameterizations of aerosol processes such as cloud activation, as well as updated emission fields for anthropogenic aerosol species and modifications in the online computation of sea salt 5 and mineral dust aerosol emissions. Aerosol results from nudged and free running simulations for the 10-year period 2003to 2012 are compared to various measurements of aerosol properties. While there are regional deviations between model and observations, the model performs well overall in terms of aerosol optical thickness, but may underestimate coarse mode aerosol concentrations to some extent, so that the modeled particles are smaller than indicated by the observations. Sulfate aerosol measurements in the US and Europe are reproduced well by the model, while carbonaceous aerosol species are biased 10 low. Both mineral dust and sea salt aerosol concentrations are improved compared to previous versions of ECHAM-HAM. The evaluation of the simulated aerosol distributions serves as a basis for the suitability of the model for simulating aerosol-climate interactions in a changing climate. 1Geosci. Model Dev. Discuss., https://doi.The increase in the positive radiative forcing of anthropogenic greenhouse gases and tropospheric ozone is partly offset by aerosols imposing a negative radiative forcing (Boucher et al., 2013; Myhre et al., 2013). Global aerosol-chemistry-climate models are key tools in the attribution and projection of the role of aerosols in the climate system. In general, aerosol components such as black and organic carbon, sulfate, mineral dust and sea salt aerosols are considered in such models as well 5 as their sources, sinks, transport and chemical and microphysical transformations. Considerable efforts have been made over the last decades to improve the incorporation of the relevant aerosol processes in climate models that control the distribution and effects of these species in the atmosphere. However, uncertainties in quantifications of aerosol-radiation interactions and aerosol-cloud interactions remain large. Further development and evaluation of global climate-aerosol-chemistry models is thus necessary to reduce such uncertainties and provide a basis for investigating the response of the coupled aerosol-climate 10 system in a changing climate.As well as the host climate models, embedded aerosol-chemistry models are continuously refined and further developed as new processes are included and process representations are improved. The increasing complexity of these models requires systematic documentation of the different existing versions. The ECHAM-HAM model consisting of the atmospheric general circulation model ECHAM and the aero...

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Section: Sulfur Chemistrymentioning

confidence: 99%

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confidence: 99%

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Tegen¹

2019

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“…The aerosol (HAM) and the chemistry (MOZ) modules can be used either interactively or independently of each other. The coupled ECHAM6-HAMMOZ model is described in detail in Schultz et al (2017). The notation ECHAM-HAMMOZ is used when both the aerosol and chemistry modules are used interactively in combination with the climate model ECHAM, and the notations ECHAM-HAM and ECHAM-MOZ apply when only the aerosol and chemistry modules, respectively, are used individually.…”

Section: Introductionmentioning

confidence: 99%

“…The HAM and MOZ modules share a common interface with ECHAM6 and consistent representation of common processes (e.g., emissions and deposition of trace gases/aerosols as well as cloud microphysics) and the associated routines. The details of the chemistry module MOZ and evaluation of the ECHAM6.3-HAM2.3-MOZ1.0 model configuration is described in Schultz et al (2017). Cloud processes and cloud-aerosol interactions as well as direct radiative forcing simulated in ECHAM6.3-HAM2.3 are evaluated in Neubauer et al(submitted).…”

Section: Introductionmentioning

confidence: 99%

The aerosol-climate model ECHAM6.3-HAM2.3: Aerosol evaluation

Tegen

Neubauer

Ferrachat

et al. 2018

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Abstract. We introduce and evaluate the aerosol simulations with the global aerosol-climate model ECHAM6.3-HAM2.3, which is the aerosol component of the fully coupled aerosol-chemistry-climate model ECHAM-HAMMOZ. Both the host atmospheric climate model ECHAM6.3 and the aerosol model HAM2.3 were updated from previous versions. The updated version of the HAM aerosol model contains improved parameterizations of aerosol processes such as cloud activation, as well as updated emission fields for anthropogenic aerosol species and modifications in the online computation of sea salt and mineral dust aerosol emissions. Aerosol results from nudged and free running simulations for the 10-year period 2003 to 2012 are compared to various measurements of aerosol properties. While there are regional deviations between model and observations, the model performs well overall in terms of aerosol optical thickness, but may underestimate coarse mode aerosol concentrations to some extent, so that the modeled particles are smaller than indicated by the observations. Sulfate aerosol measurements in the US and Europe are reproduced well by the model, while carbonaceous aerosol species are biased low. Both mineral dust and sea salt aerosol concentrations are improved compared to previous versions of ECHAM-HAM. The evaluation of the simulated aerosol distributions serves as a basis for the suitability of the model for simulating aerosol-climate interactions in a changing climate.

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Comparing the Radiative Forcings of the Anthropogenic Aerosol Emissions From Chile and Mexico

et al. 2021

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Short-lived climate forcers (SLCFs) are compounds that originate either from natural sources or human activity. In broad terms, SLCFs are atmospheric compounds that can have a substantial effect on the climate and global warming, but have a relatively short atmospheric lifetime of a few days to a decade compared to long-lived greenhouse gases (e.g., carbon dioxide [CO 2 ]) which can have lifetimes of hundreds of years. SLCFs include both gaseous compounds such as methane (CH 4 ) and hydrofluorocarbons, and aerosols such as black carbon (BC), organic carbon (OC), and sulfate (Stohl et al., 2015;UNEP, 2011).Out of all SLCFs, especially BC and CH 4 are attributed a warming effect on the climate, as they absorb shortwave (SW) and longwave (LW) radiation, respectively (Smith & Mizrahi, 2013). In addition, many SLCFs, including BC, OC, and sulfate, contribute to air pollution, which has become a central issue in most of the metropolitan areas worldwide (Krzyzanowski et al., 2014). Recently, Burnett et al. (2018) suggested that outdoor particulate air pollution could be attributable to 8.9 million deaths globally in 2015, whereas some previous estimates lie between 2 and 4 million annually (Forouzanfar et al., 2016;Silva et al., 2013). Consequently, SLCF mitigation is seen as an attractive option to improve local air quality, and mitigation of particularly warming SLCF is seen as an option to "buy time" for adapting to global warming (Bowerman et al., 2013;CCAC & UNEP, 2016).BC is a SLCF that is assumed to play a major role in global warming (AMAP, 2015;Bond et al., 2013). However, many recent studies found that the warming effect of BC aerosol might be lower than originally estimated (

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The Chemistry Climate Model ECHAM6.3-HAM2.3-MOZ1.0

Cited by 6 publications

References 19 publications

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The aerosol-climate model ECHAM6.3-HAM2.3: Aerosol evaluation

Comparing the Radiative Forcings of the Anthropogenic Aerosol Emissions From Chile and Mexico

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