What was done
The authors used the validated potato model LPOTCO to project future European potato (Solanum tuberosum cv. Bintje) yields under various climate change scenarios, including ones with elevated atmospheric CO2 and O3 concentrations.  In this paper, the projected yields were assessed under assumed optimal irrigation practices.

What was learned
Under two climate change scenarios that incorporated effects of increased greenhouse gasses on climate (increased air temperature and reduced precipitation), the model generated increases in irrigated tuber production ranging from 2,000 to 4,000 kg of dry matter per hectare across Europe.  In addition, the negative effects of elevated O3 on tuber production were typically reduced by atmospheric CO2 enrichment.  Moreover, climate change did not significantly impact any of the risks associated with potato production.

What it means
As the CO2 content of the air increases, irrigated potato production in Europe will likely increase, even if air temperatures and atmospheric O3 concentrations rise concurrently.