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.
In the second half of the nineteenth century, most European countries began to finance weather observation networks. As a result, climatological data practices changed fundamentally. Using the example of Switzerland, this paper examines the political, institutional and methodological dimensions of national data archives. The institutionalization of data collection within the national framework meant, on the one hand, that more observations were systematically made and published. On the other hand, it also meant that the monitoring was connected to state boundaries. However, based on their universalistic conception of science, this did not preclude national institutions from striving for international data standardization. The national framework also shaped the process of transforming weather observations into statistical data. This information formed the basis for national climatographies and thus had a nation-building effect. According to the Swiss Meteorological Institute, climate data were practically useful and had great potential for research work. However, the epistemic status of data collection was uncertain, since physical approaches to climatology had gained in importance. The anticipation of scientific and practical potential benefits played a central role for the continuation of data production. The Swiss case study presented here illustrates that climatology was transformed by the process of nation-building, affecting its institutional structure, spatial references, and epistemology.
Abstract. Decadal variability of weather and its extremes is still poorly understood. This is partly due to the shortness of records, which, for many parts of the world, only allow studies of 20th century weather. However, the 18th and early 19th century have seen 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 the recent progress in quantitative reconstruction of sub-daily 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 335 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.
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