The temperature record from Uppsala in Sweden starts already in 1722. This is one of the world’s longest temperature series available. A great job has been made to adjust and homogenize this data to be consistent over time, measurement locations and changed equipment. However, during the 20th and 21th century this temperature series has diverged substantially from surrounding rural stations. This is probably due to urbanization effects from the growing city of Uppsala, which has more than doubled its inhabitants from the 1950-ies to now. The location of the measurements has also been moved, not further away from the city, but instead into the city. This gives the incorrect impression that the temperature lately has increased much more than it actually has.
