Oliver Appel

Ammonium nitrate particles formed in upper troposphere from ground ammonia sources during Asian monsoons

M. Ḧopfner, Jörn Ungermann, Stephan Borrmann et al. · Nature Geoscience · 2019 · 203 citations · Full text

Natural Sciences, Earth Sciences, Meteorology +17

Aircraft-based observations of isoprene-epoxydiol-derived secondary organic aerosol (IEPOX-SOA) in the tropical upper troposphere over the Amazon region

Christiane Schulz, Johannes Schneider, Bruna A. Holanda et al. · Atmospheric chemistry and physics · 2018 · 102 citations · Full text

Natural Sciences, Earth Sciences, Air Pollution +16

Aircraft-based observation of meteoric material in lower-stratospheric aerosol particles between 15 and 68° N

Johannes Schneider, Ralf Weigel, Thomas Klimach et al. · Atmospheric chemistry and physics · 2021 · 65 citations · Full text

Natural Sciences, Chemistry, Earth Sciences +17

Cardaria, Coronopus, and Stroganowia Are United with Lepidium (Brassicaceae)

Ihsan A. Al‐Shehbaz, Klaus Mummenhoff, Oliver Appel · Novon A Journal for Botanical Nomenclature · 2002 · 62 citations

Life Sciences, Botany, Plant Sciences +14

Chemical analysis of the Asian tropopause aerosol layer (ATAL) with emphasis on secondary aerosol particles using aircraft-based in situ aerosol mass spectrometry

Oliver Appel, Franziska Köllner, Antonis Dragoneas et al. · Atmospheric chemistry and physics · 2022 · 41 citations · Full text

Natural Sciences, Chemistry, Earth Sciences +17