Euro-limpacs Deliverables

ABSTRACT - DELIVERABLE 80

Using automatic monitoring to quantify the impact of short-term changes in the weather on the dynamics of lakes

Combined with Deliverable 151

In 2002, the Centre for Ecology and Hydrology at Windermere were commissioned to design, build and install a network of automatic stations in the UK. The cost of building and testing these Lake Dynamics Monitoring Stations (LDMS) was covered by a grant from the Natural Environment Research Council. The funds made available by Eurolimpacs were designed to provide scientific support for a series of Case Studies that would demonstrate how these systems could be used to study the dynamic responses of lakes to extreme weather events.

In this report, we describe the technical characteristics of these LDMS units and explain how they have been used to monitor the physical dynamics of a range of contrasting lakes. Particular attention has been paid to the factors influencing the regional responses of the lakes and their sensitivity to short−term changes in the weather. A detailed account of the AWQMS2 units deployed in Europe has been provided by Rouen et al. (2005). The design of the LDMS units is based on the same principles, but the new units consume less power and can be left unattended for longer periods of time. Since most of the staff associated with this development of these systems have now left CEH, the responsibility for the management of these stations is now shared by several research groups operating in the UK. At the time of writing, four of these stations have been allocated to Eurolimpacs sites and four to new sites in Wales and the north of England. The Eurolimpacs sites are Loch Leven, Loch Lomond and the Round Loch of Glenhead in Scotland and Llyn Conwy in Wales. Most of the examples presented here are based on data acquired in the English Lake District but we include some comparisons with a lake in Ireland and some example results from the Round Loch of Glenhead.

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