Persistence of Low Tropospheric Ozone over the Indo-Pacific Warm Pool

Nussbaumer, Clara Maria; Pozzer, Andrea; Hewson, Michael; Ort, Linda; Krumm, Bianca; Byron, Joseph; Williams, Jonathan; Joppe, Philipp; Obersteiner, Florian; Zahn, Andreas; Lelieveld, Jos; Fischer, Horst

doi:10.22541/essoar.172838488.83682197/v1

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Persistence of Low Tropospheric Ozone over the Indo-Pacific Warm Pool

MPS-Authors

/persons/resource/persons256981

Nussbaumer, Clara Maria
Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society;

/persons/resource/persons101196

Pozzer, Andrea
Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society;

/persons/resource/persons289885

Ort, Linda
Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society;

/persons/resource/persons297521

Krumm, Bianca
Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society;

/persons/resource/persons230541

Byron, Joseph
Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society;

/persons/resource/persons101364

Williams, Jonathan
Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society;

/persons/resource/persons304202

Joppe, Philipp
Particle Chemistry, Max Planck Institute for Chemistry, Max Planck Society;

/persons/resource/persons101104

Lelieveld, Jos
Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society;

/persons/resource/persons100935

Fischer, Horst
Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society;

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https://essopenarchive.org/doi/pdf/10.22541/essoar.172838488.83682197/v1
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引用

Nussbaumer, C. M., Pozzer, A., Hewson, M., Ort, L., Krumm, B., Byron, J., Williams, J., Joppe, P., Obersteiner, F., Zahn, A., Lelieveld, J., & Fischer, H. (2024). Persistence of Low Tropospheric Ozone over the Indo-Pacific Warm Pool. ESS Open Archive. doi:10.22541/essoar.172838488.83682197/v1.

引用: https://hdl.handle.net/21.11116/0000-0010-4E5C-1

要旨

Lightning is the most important source of nitric oxide (NO) in the tropical upper troposphere and controls the formation of tropospheric ozone (O3). It is associated with deep convective processes and occurs mostly (∼90%) over tropical continents. The Chemistry of the Atmosphere Field Experiment in the Pacific (CAFE Pacific) was conducted in early 2024 from Cairns, Australia, taking airborne measurements across the Australian continent and the surrounding maritime regions. Based on cloud top properties, lightning data and in situ observations of NO, O3 and carbon monoxide (CO), we show that deep convection occurs over both Northern Australia and the Indo-Pacific Warm Pool. While we identify strong lightning activity over Australia, deep convection in the Warm Pool is not electrified. We conclude that low O3 in the Warm Pool is due to O3-poor air from the marine boundary layer, which is not replenished by photochemical production from NO at high altitudes.