1. Introduction

The Tropospheric Ozone Assessment Report (TOAR) is an activity of the International Global Atmospheric Chemistry (IGAC) organisation (see https://igacproject.org/activities/TOAR). It currently runs in its second phase, TOAR-II 2020-2024, https://igacproject.org/activities/TOAR/TOAR-II (in our context denoted as TOAR V2 1 ). It is collecting surface ozone measurements and related data from all over the world in a central database at Forschungszentrum Jülich, Germany. The purpose of collecting this data is to provide globally consistent metrics for analyses of health, vegetation, and climate impacts from ozone air pollution. The database is exposed via a REST API and graphical web services 2 which allow users to visualise data and compare them with other data sets and model observations. We collect data from cooperating data centres, harmonise it, and check its quality before adding it to the TOAR database.

The TOAR Data Centre governs a multi-faceted e-infrastructure with a repository for surface ozone observations and related data. This infrastructure supports the Tropospheric Ozone Assessment Report - phase II and other independent scientific studies. The TOAR Data Centre is developed and operated by the Jülich Supercomputing Centre (JSC) at Forschungszentrum Jülich (FZJ), Germany. Fig. 1.1 shows the environment of the TOAR Data Centre which includes the TOAR database infrastructure as main component (detailed in Fig. 2.1).


Fig. 1.1 Context of the TOAR Data Centre

This technical guide illustrates the infrastructure set-up for housing the TOAR Data Centre infrastructure and its services. It describes the service architecture and technical implementations of the TOAR data services for system administrators who need to set-up and maintain the infrastructure. The document can be shared freely as it does not any sensitive information.



TOAR phase I ran 2014-2019 - in our context it is TOAR V1


At the time of writing the GUI is available for the TOAR V1 database only