Articles | Volume 20, issue 21
Research article
03 Nov 2020
Research article |  | 03 Nov 2020

Impact of the South Asian monsoon outflow on atmospheric hydroperoxides in the upper troposphere

Bettina Hottmann, Sascha Hafermann, Laura Tomsche, Daniel Marno, Monica Martinez, Hartwig Harder, Andrea Pozzer, Marco Neumaier, Andreas Zahn, Birger Bohn, Greta Stratmann, Helmut Ziereis, Jos Lelieveld, and Horst Fischer

Data sets

Oxidation Mechanism Observations in the extrattropical free TS OMO (Oxidation Mechanism Observations)

Short summary
During OMO we observed enhanced mixing ratios of hydroperoxides (ROOH) in the Asian monsoon anticyclone (AMA) relative to the background. The observed mixing ratios are higher than steady-state calculations and EMAC simulations, especially in the AMA, indicating atmospheric transport of ROOH. Uncertainties in the scavenging efficiencies likely cause deviations from EMAC. Longitudinal gradients indicate a pool of ROOH towards the center of the AMA associated with upwind convection over India.
Final-revised paper