Storminess in the Low Countries, 1390–1725 ADRIAAN DE KRAKER Institute for Geoarchaeology and Bioarchaeology VU-University De Boelelaan 1105, 1081 HV Amsterdam, Netherlands Email:
[email protected] ABSTRACT This paper looks into the historic storms of coastal Flanders and the south-west- ern part of the Netherlands between 1390 and 1725. High quality information about these weather extremes has been retrieved from administrative docu- ments concerning the annual maintenance of sea walls. Because the period under study deals with non-instrumental storm data, a method has been applied to assess this information, from which a picture emerges of annual storminess and of changing storminess throughout this long time period. Thus, periods of increasing and declining storm frequency can be distinguished. These fluc- tuations are compared with the storminess of the present period and some consideration is also given to possible links between historic storm frequency and temperature. Finally, attention is paid to the second decade of the eight- eenth century, with its unusually high number of gales, and options for further research are explored. KEYWORDS Weather extremes, storminess, proxy data, flooding events, coastal defence, Low Countries, Little Ice Age, historical climatology INTRODUCTION This paper discusses storminess in the coastal areas of the south-west Netherlands and Flanders between 1390 and 1725. The study of storms is of particular interest, because these weather extremes can cause huge dam- age; today this is covered by insurance, but in the past it was not. Until half a century ago storm surges usually led to the flooding of vast areas, the loss of livestock, the destruction of buildings and many casualties.