The carbon intensity of the UK’s power grid has risen by 8% over the past three months due to high pressure dampening wind speeds over the summer.

Solar panels helped to make up for some of the shortfall from wind turbines, but gas-fired power stations were still used to meet demand.

Duncan Burt, Director of Operations at National Grid, said: “We have seen a slight decrease in wind over the summer linked to the unusually warm weather, which demonstrates why it is important for us to have a diverse energy mix to ensure we can continue to manage supply and demand.”

Emissions may have risen over the summer, but carbon intensity over the first eight months of the year was still down 3% to a record low.

Bank holiday breezes

While the summer may have seen a rise in carbon intensity, stronger winds over the English bank holiday weekend saw figures drop below their 2030 targets.

National Grid recorded carbon intensity as falling to 79g/kWh, but Drax’s energy insights data suggested the figure dipped as low as 72g.

Around 9GW of wind was online at the time, pushing carbon intensity into the 50-100g range sought by 2030.

> See more carbon intensity data from National Grid