Articles | Volume 24, issue 8
https://doi.org/10.5194/acp-24-4693-2024
https://doi.org/10.5194/acp-24-4693-2024
Research article
 | 
19 Apr 2024
Research article |  | 19 Apr 2024

Air mass transport to the tropical western Pacific troposphere inferred from ozone and relative humidity balloon observations above Palau

Katrin Müller, Peter von der Gathen, and Markus Rex

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Short summary
The transport history of tropospheric air masses above the tropical western Pacific is studied by local ozone and relative humidity profile measurements from Palau. A prominent anti-correlation between both tracers separates air masses of different origin and genesis. Back trajectories confirm a local convective origin of the year-round humid ozone-poor background. Anomalously dry ozone-rich air is generated in tropical Asia by pollution and dehydrated during transport via radiative cooling.
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