Input of heat pressure dataset contains delta heat values from warm water discharge of

- Discharge of warm water from nuclear power plants

- Fossil fuel energy production.

Discharge of warm water from nuclear power plants (2016-2021):

1 km buffer with steep decrease around outlet (Type D decline), composed of 4 rings [1]. Average input of heat load (Twh) of discharge of warm water from the nuclear power plant outlets. No data on heat load was available for the Leningrad nuclear power plant; therefore, the average heat load of discharge of warm water from nuclear power plants was given.

Fossil fuel energy production (only location available):

1 km buffer with steep decrease around outlet (Type D decline), composed of 6 rings[12]. Heat load 1 (TWh) was given to all production sites, based on the average heat load of an individual production site in Helsinki.

Heat load from both layers were summed and the layer was normalized.

[1] Extent based on Ilus et al. 1986.