TransClim

Schematic illustration of TransClim
Schematic illustration of TransClim, status: May 2025. In addition to the published versions (see “Links”), the current version also includes aerosol and CO₂ effects, and an updated treatment of the forcing via perturbation of the atmospheric CH₄ residence time. Abbreviations: SO₂ – sulfur dioxide, NOₓ – nitrogen oxides (NO₂, nitrogen dioxide + NO, nitric oxide), CO – carbon monoxide, NMVOC – non-methane volatile organic compounds, CO₂ – carbon dioxide, RF – radiative forcing, ΔT – temperature change, MADE3 – name of aerosol submodel, QCTM – quasi chemistry transport mode (without feedback of chemistry on atmospheric dynamics), ERF – effective radiative forcing (including fast adaptations of the atmosphere like cloud formation).
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TransClim (Modelling the effect of surface Transportation on Climate) allows for rapid but comprehensive assessment of the radiative imbalance induced by land transport. To achieve this, the model makes use of hundreds of existing 3D chemistry-climate simulations with the EMAC model. Given the emission totals of both short-lived and long-lived species in one or more of the 11 considered world regions, different mitigation options can thus be compared within seconds. In addition to non-linear ozone (O3) changes [1], all other major forcing agents, that is, aerosol particles and their interactions with radiation and clouds, methane (CH4), and carbon dioxide (CO2), are now also considered within TransClim itself.

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