The TOAR Data Portal is a discovery and access portal for tropospheric ozone data. It helps researchers identify datasets that are relevant to their scientific questions, particularly for studying the global-scale impacts of ozone on climate, human health, and crop and ecosystem productivity.

The portal provides concise, standardized information about available datasets, including their documentation, data availability, licensing conditions, contact information, and REST API availability. It brings together information on ozone datasets from different data providers and measurement platforms, as well as model data, and can serve as a starting point for finding suitable data for ozone research.

The TOAR Data Portal does not store copies of the datasets listed in the portal. Instead, it provides links to the websites, repositories, and interfaces of the respective data providers. Access to the actual data therefore depends on the provider, and users should consult the linked sources for information on data formats, access procedures, licensing, and conditions of use. The majority of datasets listed in this portal are not directly curated by TOAR, and we assume no responsibility for the accuracy of the information provided.

The portal is part of the broader TOAR Data Centre and provides access to information about the TOAR Database, which contains curated global surface-station measurements and related data. The vast majority of these datasets were obtained through direct collaboration with environmental and research agencies around the world. The TOAR Database can be accessed through the TOAR web services and dashboard.