Impacto de los halógenos tipo VSL sobre el ozono y la capacidad oxidativa atmosférica
Even though atmospheric halogen chemistry studies had historically focused on the impact of Long-Lived (LL) halocarbons on stratospheric ozone, very short-lived (VSL) halocarbon chemistry strongly impact, in addition, on the tropospheric ozone budget. The present project aims at performing a detaile...
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| Autores principales: | , , , , , , |
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| Publicado: |
2019
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| Acceso en línea: | https://bdigital.uncu.edu.ar/fichas.php?idobjeto=14279 |
| Sumario: | Even though atmospheric halogen chemistry studies had historically focused on the impact of Long-Lived (LL) halocarbons on stratospheric ozone, very short-lived (VSL) halocarbon chemistry strongly impact, in addition, on the tropospheric ozone budget. The present project aims at performing a detailed study focused on the spatial and altitude distribution of the natural VSL impact on the oxidative capacity of the atmosphere. We will use the state-of-the art CAM-Chem Chemistry-Climate Model, as well as the widely used WRF-Chem Chemical Transport Model, to perform a set of sensitivity simulations oriented to determine the halogenated VSL burden in the Earth during the past, present and future times, following different Reactive Concentration Pathways. In particular we will quantify the relative impact of VSL chemistry on the oxidative capacity of the Planetary and Marine Boundary Layer, the Free Troposphere and Lowermost Stratosphere, comparing the natural halogen impact respect to the dominant catalytic cycles driven by the OH radical. We will focus on obtaining the regional (tropics, mid-latitudes, polar regions) and seasonal (winter, spring, summer and fall) variability of VSL atmospheric impacts, distinguishing the independent contribution from each of the chlorine, bromine and iodine families. Finally, we will perform on/off experiments oriented to split the natural background contribution of biogenic VSL to the dominant anthropogenic impact of halogen chemistry in the atmosphere. |
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