Low Tropospheric Ozone Over the Indo‐Pacific Warm Pool Related to Non‐Electrified Convection
Abstract 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 convection and occurs mostly over continents. The Chemistry of the Atmosphere Field Experiment in the Pacific (CAFE...
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| Format: | Article |
| Language: | English |
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Wiley
2025-03-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2024GL112788 |
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| author | Clara M. Nussbaumer Andrea Pozzer Michael Hewson Linda Ort Bianca Krumm Joseph Byron Jonathan Williams Philipp Joppe Florian Obersteiner Andreas Zahn Jos Lelieveld Horst Fischer |
| author_facet | Clara M. Nussbaumer Andrea Pozzer Michael Hewson Linda Ort Bianca Krumm Joseph Byron Jonathan Williams Philipp Joppe Florian Obersteiner Andreas Zahn Jos Lelieveld Horst Fischer |
| author_sort | Clara M. Nussbaumer |
| collection | DOAJ |
| description | Abstract 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 convection and occurs mostly over 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, we show that deep convection occurs over Northern Australia and the Indo‐Pacific Warm Pool. While we identify strong lightning activity over Australia, we observe deep convection in the Warm Pool that is not electrified. Our observations of low O3 in the Warm Pool can be attributed to O3‐poor air from the marine boundary layer, which is not replenished by photochemical production from NO at high altitudes. |
| format | Article |
| id | doaj-art-9ffb72e46e0b474391509f3374403bef |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-9ffb72e46e0b474391509f3374403bef2025-08-20T02:16:05ZengWileyGeophysical Research Letters0094-82761944-80072025-03-01525n/an/a10.1029/2024GL112788Low Tropospheric Ozone Over the Indo‐Pacific Warm Pool Related to Non‐Electrified ConvectionClara M. Nussbaumer0Andrea Pozzer1Michael Hewson2Linda Ort3Bianca Krumm4Joseph Byron5Jonathan Williams6Philipp Joppe7Florian Obersteiner8Andreas Zahn9Jos Lelieveld10Horst Fischer11Department of Atmospheric Chemistry Max Planck Institute for Chemistry Mainz GermanyDepartment of Atmospheric Chemistry Max Planck Institute for Chemistry Mainz GermanySchool of Education and the Arts Central Queensland University Rockhampton QLD AustraliaDepartment of Atmospheric Chemistry Max Planck Institute for Chemistry Mainz GermanyDepartment of Atmospheric Chemistry Max Planck Institute for Chemistry Mainz GermanyDepartment of Atmospheric Chemistry Max Planck Institute for Chemistry Mainz GermanyDepartment of Atmospheric Chemistry Max Planck Institute for Chemistry Mainz GermanyDepartment of Particle Chemistry Max Planck Institute for Chemistry Mainz GermanyInstitute of Meteorology and Climate Research (IMK) Karlsruhe Institute of Technology Karlsruhe GermanyInstitute of Meteorology and Climate Research (IMK) Karlsruhe Institute of Technology Karlsruhe GermanyDepartment of Atmospheric Chemistry Max Planck Institute for Chemistry Mainz GermanyDepartment of Atmospheric Chemistry Max Planck Institute for Chemistry Mainz GermanyAbstract 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 convection and occurs mostly over 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, we show that deep convection occurs over Northern Australia and the Indo‐Pacific Warm Pool. While we identify strong lightning activity over Australia, we observe deep convection in the Warm Pool that is not electrified. Our observations of low O3 in the Warm Pool can be attributed to O3‐poor air from the marine boundary layer, which is not replenished by photochemical production from NO at high altitudes.https://doi.org/10.1029/2024GL112788tropospheric ozonedeep convectionlightningIndo‐Pacific warm PoolAustraliain situ observations |
| spellingShingle | Clara M. Nussbaumer Andrea Pozzer Michael Hewson Linda Ort Bianca Krumm Joseph Byron Jonathan Williams Philipp Joppe Florian Obersteiner Andreas Zahn Jos Lelieveld Horst Fischer Low Tropospheric Ozone Over the Indo‐Pacific Warm Pool Related to Non‐Electrified Convection Geophysical Research Letters tropospheric ozone deep convection lightning Indo‐Pacific warm Pool Australia in situ observations |
| title | Low Tropospheric Ozone Over the Indo‐Pacific Warm Pool Related to Non‐Electrified Convection |
| title_full | Low Tropospheric Ozone Over the Indo‐Pacific Warm Pool Related to Non‐Electrified Convection |
| title_fullStr | Low Tropospheric Ozone Over the Indo‐Pacific Warm Pool Related to Non‐Electrified Convection |
| title_full_unstemmed | Low Tropospheric Ozone Over the Indo‐Pacific Warm Pool Related to Non‐Electrified Convection |
| title_short | Low Tropospheric Ozone Over the Indo‐Pacific Warm Pool Related to Non‐Electrified Convection |
| title_sort | low tropospheric ozone over the indo pacific warm pool related to non electrified convection |
| topic | tropospheric ozone deep convection lightning Indo‐Pacific warm Pool Australia in situ observations |
| url | https://doi.org/10.1029/2024GL112788 |
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