The secular record of annual mean temperatures of Bremen shows that inhomogeneities - especially caused by station transfers - lead to serious problems concerning the interpretation of climatic trends or fluctuations. Especially two transfers of the meteorological observing station in Bremen within our century - 1935/36 and 1978 - caused significant inhomogeneities, well documented by parallel measurements for several years. Obviously the stagnation of the temperature level of the original data set is a result of these transfers. The homogenized record version reveals a significant warming trend of about 1 Kelvin within the last century.

Supplement to: Bätjer, Diedrich; Heinemann, Hans-Joachim (1980): Eineinhalb Jahrhunderte meteorologischer Beobachtungen in Bremen. Abhandlungen des Naturwissenschaftlichen Vereins zu Bremen, 39, 185-261