Chiverrell, R.C., Sear, D.A., Warburton, J., Macdonald, N., Schillereff, D.N., Dearing, J.A., Croudace, I.W., Brown, J. and Bradley, J. (2019) Using lake sediment archives to improve understanding of flood magnitude and frequency: recent extreme flooding in northwest UK. Earth Surface Processes and Landforms, 44 (12), 2366-2376. (doi:10.1002/esp.4650).
Abstract
We present the first quantitative reconstruction of palaeofloods using lake sediments for the UK and show that for a large catchment in NW England the cluster of devastating floods from 1990 to present is without precedent in this 558‐year palaeo‐record. Our approach augments conventional flood magnitude and frequency (FMF) analyses with continuous lake sedimentary data to provide a longer‐term perspective on flood magnitude recurrence probabilities. The 2009 flood, the largest in >558 years, had a recurrence interval larger (1:2,200 year) than revealed by conventional flood estimation using shorter duration gauged single station records (1:1,700 year). Flood‐rich periods are non‐stationary in their correlation with climate indices, but the 1990‐2018 cluster is associated with warmer Northern Hemisphere Temperatures and positive Atlantic Multidecadal Oscillation. Monitored records rarely capture the largest floods and our palaeoflood series shows, for this catchment, such omissions undermine evaluations of future risk. Our approach provides an exemplar of how to derive centennial palaeoflood reconstructions from lakes coupled well with their catchments around the world.
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- Faculties (pre 2018 reorg) > Faculty of Engineering and the Environment (pre 2018 reorg) > Southampton Marine & Maritime Institute (pre 2018 reorg)
- Faculties (pre 2018 reorg) > Faculty of Natural and Environmental Sciences (pre 2018 reorg) > Institute for Life Sciences (pre 2018 reorg)
Current Faculties > Faculty of Environmental and Life Sciences > Institute for Life Sciences > Institute for Life Sciences (pre 2018 reorg)
Institute for Life Sciences > Institute for Life Sciences (pre 2018 reorg) - Current Faculties > Faculty of Environmental and Life Sciences > School of Geography and Environmental Sciences > Palaeoenvironment Laboratory (PLUS)
School of Geography and Environmental Sciences > Palaeoenvironment Laboratory (PLUS) - Current Faculties > Faculty of Environmental and Life Sciences > School of Geography and Environmental Sciences > Landscape Dynamics and Ecology
School of Geography and Environmental Sciences > Landscape Dynamics and Ecology
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