Abstract. The decadal variability of weather and its extremes
are still poorly understood. This is partly due to the scarcity of records,
which, for many parts of the world, only allow for studies of 20th century
weather. However, the 18th and early 19th centuries saw some
pronounced climatic variations, with equally pronounced impacts on the
environment and society. Considerable amounts of weather data are available
even for that time but have not yet been digitised. Given recent
progress in the quantitative reconstruction of subdaily weather, such data
could form the basis of weather reconstructions. In Switzerland,
measurements before 1864 (the start of the national network) have never been
systematically compiled except for three prominent series (Geneva, Basel,
Great St. Bernard Pass). Here we provide an overview of early instrumental
meteorological measurements in Switzerland resulting from an archive survey.
Our inventory encompasses 334 entries from 206 locations, providing an
estimated 3640 station years and reaching back to the early 18th
century. Most of the data sheets have been photographed and a considerable
fraction is undergoing digitisation. This paper accompanies the online
publication of the imaged data series and metadata. We provide a detailed
inventory of the series, discuss their historical context, and provide the
photographed data sheets. We demonstrate their usefulness on behalf of two
historical cases and show how they complement the existing series in Europe.
If similar searches in other countries yield similarly rich results, an
extension of daily weather reconstructions for Europe back to the 1760s is
possible.