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

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

doi:https://doi.org/10.5194/acp-20-12655-2020

Articles | Volume 20, issue 21

Atmos. Chem. Phys., 20, 12655–12673, 2020

https://doi.org/10.5194/acp-20-12655-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Atmos. Chem. Phys., 20, 12655–12673, 2020

https://doi.org/10.5194/acp-20-12655-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

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 et al.

Data sets

Oxidation Mechanism Observations in the extrattropical free TS OMO (Oxidation Mechanism Observations) https://halo-db.pa.op.dlr.de/mission/0

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.