Modelling the Inorganic Bromine Partitioning in the Tropical Tropopause over the Pacific Ocean
| Autor: | Simone Tilmes, Carlos A. Cuevas, Troy Thornberry, Xavier Rodriguez-Lloveras, Jean-Francois Lamarque, James W. Elkins, Maria A. Navarro, Rafael P. Fernandez, Eric J. Hintsa, Elliot Atlas, Alfonso Saiz-Lopez, Andrew W. Rollins, Douglas E. Kinnison, Fred L. Moore |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Ozone
Bromine ATTREX Solar zenith angle chemistry.chemical_element Atmospheric model Atmospheric sciences Ozone depletion potential TROPICAL WESTERN PACIFIC VSL BROMINE Ciencias de la Tierra y relacionadas con el Medio Ambiente Trace gas purl.org/becyt/ford/1 [https] chemistry.chemical_compound purl.org/becyt/ford/1.5 [https] chemistry Abundance (ecology) INORGANIC BROMINE Nitrogen dioxide Meteorología y Ciencias Atmosféricas CIENCIAS NATURALES Y EXACTAS |
| Zdroj: | CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| Popis: | The stratospheric inorganic bromine burden (Bry) arising from the degradation of brominated very short-lived organic substances (VSL org ), and its partitioning between reactive and reservoir species, is needed for a comprehensive assessment of the ozone depletion potential of brominated trace gases. Here we present modelled inorganic bromine abundances over the Pacific tropical tropopause based on aircraft observations of VSL org of two campaigns of the Airborne Tropical TRopopause EXperiment (ATTREX 2013 carried out over eastern Pacific and ATTREX 2014 carried out over the western Pacific) and chemistry-climate simulations (along ATTREX flight tracks) using the specific meteorology prevailing. Using the Community Atmosphere Model with Chemistry (CAM-Chem), we model that BrO and Br are the daytime dominant species. Integrated across all ATTREX flights BrO represents ~ 43 % and 48 % of daytime Bry abundance at 17 km over the Western and Eastern Pacific, respectively. The results also show zones where Br/BrO >1 depending on the solar zenith angle (SZA), ozone concentration and temperature. On the other hand, BrCl and BrONO 2 were found to be the dominant night-time species with ~ 61% and 56 % of abundance at 17 km over the Western and Eastern Pacific, respectively. The western-to-eastern differences in the partitioning of inorganic bromine are explained by different abundances of ozone (O3), nitrogen dioxide (NO2) , and total inorganic chlorine (Cly). Fil: Navarro, María A.. University of Miami; Estados Unidos Fil: Saiz-lopez, Alfonso. Consejo Superior de Investigaciones Científicas. Instituto de Química Física; España Fil: Cuevas, Carlos Alberto. Consejo Superior de Investigaciones Científicas. Instituto de Química Física; España Fil: Fernandez, Rafael Pedro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza; Argentina. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina. Universidad Tecnologica Nacional. Facultad Regional Mendoza. Secretaría de Ciencia, Tecnología y Postgrado; Argentina Fil: Atlas, Elliot. University of Miami; Estados Unidos Fil: Rodriguez Lloeveras, Xavier. Consejo Superior de Investigaciones Científicas. Instituto de Química Física; España Fil: Kinnison, Douglas E.. National Center For Atmospheric Research. Amospheric Chemistry División; Estados Unidos Fil: Lamarque, Jean Francois. National Center For Atmospheric Research. Amospheric Chemistry División; Estados Unidos Fil: Tilmes, Simone. National Center For Atmospheric Research. Amospheric Chemistry División; Estados Unidos Fil: Thornberry, Troy. State University of Colorado at Boulder; Estados Unidos. Earth System Research Laboratory; Estados Unidos Fil: Rollins, Andrew. State University of Colorado at Boulder; Estados Unidos. Earth System Research Laboratory; Estados Unidos Fil: Elkins, James W.. Earth System Research Laboratory; Estados Unidos Fil: Hintsa, Eric J.. State University of Colorado at Boulder; Estados Unidos. Earth System Research Laboratory; Estados Unidos Fil: Moore, Fred L.. State University of Colorado at Boulder; Estados Unidos. Earth System Research Laboratory; Estados Unidos |
| Databáze: | OpenAIRE |
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