Heidelberg 2015 – wissenschaftliches Programm
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UP: Fachverband Umweltphysik
UP 18: Meßtechnik (verschoben von Donnerstag 17:30)
UP 18.5: Vortrag
Freitag, 27. März 2015, 15:00–15:15, G/gHS
Pollution transport and processing in the upper tropospheric Indian summer monsoon from CARIBIC observations — •Armin Rauthe-Schöch1, Angela Baker1, Carl Brenninkmeijer1, Andreas Zahn2, Helmut Ziereis3, Markus Hermann4, and Peter van Velthoven5 — 1Max Planck Institut for Chemistry, Mainz, Germany — 2Karlsruhe Institut of Technology, Karlsruhe, Germany — 3German Aerospace Center, Oberpfaffenhofen, Germany — 4Institute for Tropospheric Research, Leipzig, Germany — 5Royal Netherlands Meteorological Institute, De Bilt, the Netherlands
The CARIBIC aircraft observatory was deployed to survey the Indian summer monsoon in the subtropical upper troposphere in 2008. Being a fully automated analytical laboratory including air sample and aerosol particle sample collection systems, over 100 trace gases as well as aerosol particle concentrations were assayed. The monthly CARIBIC flights between Frankfurt/Germany and Chennai/India, crossing the western edge of the huge upper tropospheric monsoon anticyclone (UTAC), demonstrated a remarkably consistent chemical evolution of the UTAC over a distance of more than 3000 km. Studies of greenhouse gas emissions, sources of methane as well as a methyl chloride emissions estimate from South Asia have been published. Here we combine chemical tracers observed with CARIBIC and meteorological analyses to obtain a more complete picture of the mixture of trace gases inside the UTAC, the chemical age of the air masses, photochemical tendencies, as well as source regions and export pathways of the air.