Actually Ronan Connolly has a PhD in computational chemistry/polymer physics, has has published many "Climate Science" articles, such as :

- Comparing the current and early 20th century warm periods in China

- Northern hemisphere snow-cover trends (1967–2018): a comparison between climate models and observations

- Re-calibration of Arctic sea ice extent datasets using Arctic surface air temperature records

- How Much Human-Caused Global Warming Should We Expect with Business-As-Usual (BAU) Climate Policies? A Semi-Empirical Assessment

And much more, see: https://scholar.google.com/citations?user=8JOBXYEAAAAJ