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Christopher Fogwill

Mt Gardener, Ellsworth Mountains, Antarctcica
Mt_Gardener

My background is in Quaternary palaeoclimate research. My Ph.D. specialised in geochronology and glacial geomorphology, applying the technique of cosmogenic surface exposure analysis in glacial environments in collaboration with Professor David Sugden (Edinburgh), Dr Mike Bentley (Durham)and Dr P. Kubik (ETH, Zurich). By constraining the timing of glacial expansion related to the Last Glacial Interglacial Transition at mid and high latitude sites in the southern hemisphere my Ph.D. aimed to gain insights into the forcing mechanisms of global climate change. My interest in this field stems from my background in Quaternary Palaeoceanography, the study of which demonstrated to me the inherent difficulties of integrating the marine and terrestrial records of palaeoclimate. My research is fundamentally interdisciplinary, involving collaboration with geologists, physical geographers, geomorphologists, palaeoecologists and glacial modellers. My research activities focus on two regions: 1) Southern South America, Patagonia and 2) The Antarctic Peninsula and massifs surrounding the Ronnie-Filchner Ice Shelf, the details of which are outlined below.

The application of surface exposure dating to landforms of the last glacial interglacial transition in Patagonia:

Funded by a NERC studentship and Carnegie Fund for Scottish Universities. The application of cosmogenic surface exposure dating has constrained the timing of major advances of the South Patagonian Ice Sheet during the Last Glacial Interglacial Transition. The timing of these events has previously been in question due to the paucity of preserved organic material in the extremely arid conditions prevailing to the east of the Southern Andes. These temporal and spatial fixes strengthen the results of other workers suggesting that ice expansion at the Last Glacial Maximum occurred synchronously throughout southern South America. However initial cosmogenic 10Be results from a moraine in Torres del Paine indicate that a short-lived re-advance of the Patagonian Ice Cap culminated between 12.4-14.8 Ka BP, with a mean age of 13.2 0.8 Ka BP. This advance extended some 40 km from the modern ice margin and was within 15 km of the LGM limits. The timing of this advance coincides with the cooling event recorded in Antarctic Ice Cores, termed the Antarctic Cold Reversal (ACR) (14.5-12.9 Ka BP). This result implies that glaciers at these latitudes were out of phase with those in the northern hemisphere, rather they mirrored the climate structure recorded in Antarctic ice cores during the last glacial to interglacial transition. This blend of 'Northern' and 'Southern' hemispheric climatic signals could reflect changes in boundry conditions during the swith from stable glacial to stable interglacial modes in the mid to high lattitude southern hemisphere.

Geomorphological evidence and cosmogenic 10Be/26Al exposure ages for the Last Glacial Maximum configuration of the Antarctic Peninsula Ice Sheet:

Funded by a NERC small grant awarded to Prof. D.E. Sugden and Dr. M.J. Bentley on which I was the named researcher. This study represents the first systematic attempt to constrain the timing of deglaciation of the Antarctic Peninsula Ice Sheet from its configuration at the Last Glacial Maximum. The resultant pattern was found to be very complex with different elements of the ice sheet seemingly reacting to different controls. The interplay of precipitation, grounding line migration and perhaps most importantly eustatic sea level have left an interesting but complex pattern of deglaciation recorded in the rocks of this region.

Preliminary constraints on age, erosion and uplift of the Shackleton Range, Antarctica:

Determined from the in situ cosmogenic nuclides 10Be and 26Al: The concentrations of cosmogenic nuclides on bedrock surfaces in this massif at the junction of the East Antarctic Ice Sheet and the Ronnie Filchner Ice Shelf indicate that the results of modelling studies suggesting significant ice thickening at this point during the Last Glacial Maximum are incorrect. Exposure ages of surfaces that have been described as a product of the LGM are in fact from Pliocene or more likely Miocene times. Due to the altitude dependence and radioactive decay of these cosmogenic nuclides, it is possible to provide constraints on tectonic uplift and surface erosion in the Shackleton Range.

Published Journal articles:

Fogwill, C.J. Kubik, P.W. Bentley, M.J. Sugden, D.E. and Kerr, A. Cosmogenic nuclides 10Be and 26Al imply limited Antarctic Ice Sheet thickening and low erosion in the Shackleton Range for >.1 m.y.. Geology. March 2004 v.32; no 3 p.265-268

Fogwill, C.J. and Kubik, P.W. A glacial stage spanning the Antarctic Cold Reversal in Torres del Paine, Chile, based on cosmogenic exposure ages. Geografiska Annaler Vol 82A. No2 2005.

McCulloch, R.D. Fogwill, C.J. Sugden, D.E. and Bentley, M.J. and Kubik, P.W. Chronology of the last glaciation in central Strait of Magellan and Bahia Inutil, southernmost South America. Geografiska Annaler Vol 82A. No2 2005 .

Sugden, D.E., Bentley M.J., Fogwill C.J., Hulton N.R.J., McCulloch, R.D. and Purves, R.S. Late-Glacial Glacier Events in Southernmost South America: A Bland of 'Northern' and 'Southern' Hemispheric Climate Signals? Geografiska Annaler Vol 82A. No2 2005

K.J Turner, C.J. Fogwill, R.D. McCulloch, and D.E. Sugden. Deglaciation of the Eastern Flank of the North Patagonian Icefield and Associated Contintental-Scale Lake Diversions. Geografiska Annaler Vol 82A. No2 2005

Everest,J.D.,Bradwell,T.,Fogwill,C.J.and Kubik,P.W.,2006: Cosmogenic 10 Be age constraints for the Wester Ross Readvance moraine: insights into British Ice-Sheet behaviour.Geografiska Annaler Vol. 88 A(1):1 -9.

Bentley, M.J. Fogwill, C.J. Kubik, P.W. and Sugden, D.E., 2006. Geomorphological evidence and cosmogenic 10Be/26Al exposure ages for the Last Glacial Maximum configuration of the Antarctic Peninsula Ice Sheet.Geological Society of America Bulletin. Vol 118. no9/10. p 1149-1159.

Mt Bentley, Ellsworth Mountains, Antarctcica
Mt_Bentley

Jounal Articles in Review:

Bentley, M.J. Evans, D.J.A, Fogwill. C.J. Hansom, J.D. Sugden, D.E. And Kubik, P.W. Cosmogenic 10Be and 14C Chronology of deglaciation, South Georgia, Sub-Antarctic. (In press Quaternary Science Reviews)

M.R. Kaplan, C.J. Fogwill, D.E.Sugden, N.J. Hulton, P.W. Kubik. The Local Last Glacial Maximum in the Southernmost Andes (In review Science)

Fogwill, C.J. Kubik, P.W. Bentley, M.J. Sugden, D.E. Stewart, F.M. and Kerr, A. Ice elevation changes in the Shackleton Range, Antarctica. In preparation for a special edition of Palaeogeography, Palaeoclimatology, Palaeoecology focussed on Antarctic Climate Evolution.

Presentations and conference abstracts:

European Geosciences Union. General Assembly Vienna (2006). Presentation: Ice elevation changes in the Shackleton Range, Antarctica. Fogwill, C.J. Sugden, D.E. Bentley, M.J.; Kerr, A.R.; Kubik, P.W.European Geosciences Union. General Assembly Vienna (2006). Presentation: Ice elevation changes in the Shackleton Range, Antarctica. Fogwill, C.J. Sugden, D.E. Bentley, M.J.; Kerr, A.R.; Kubik, P.W.

The Hutton Club (2006). Presentation: The glacial geomorphology of the Ellsworth Mountains, Antarctica: Implications for ice dynamics and climate. Fogwill, C.J. Victoria University, Wellington. Presentation. Late glacial climate signals in Patagonia, southern most South America: Implications for New Zealand?

Quaternary Reseach Association: Annual Discussion Meeting, Glasgow. (2006). Poster: New cosmogenic 10Be age constraints from a British Ice Sheet margin: the Wester Ross Readvance Moraine. Everest, J.D., Bradwell, T., Fogwill, C.J. & Kubik, P.W.

British Geological Survey Seminar Series. (2004). Presentation: Cosmogenic exposure analysis, a tool for constraining earth surface processes Fogwill, C.J.

Earth System Processes. The Geological Society of America and Geological Society of London (2001). Poster presentation: The application of in situ cosmogenic exposure dating (10Be), to glacial deposits of the Last Deglaciation in the southern Andes of Chile. Fogwill, C.J. Kubik, P.W. Sugden, D. and Phillips, W.M.

European Union of Geosciences. Conference 11 (2001). Presentation: The application of cosmogenic exposure dating to glacial deposits of the Last Deglaciation in the southern Andes of Chile. Fogwill, C.J. Kubik, P.W. and Phillips, W.M.

Quaternary Research Association Postgraduate Symposium (1998). Presentation: In Patagonia: the dynamics of Late Glacial climatic change. Fogwill, C.J.

Mineralogical Society: Volcanic Studies Group Conference (1997). Poster: The geochemistry and tephrostratigraphy of the Chatham Rise East of the Taupo Volcanic Zone, since the Last Glacial Maximum. Fogwill, C.J., Lean. C.B. and McCave, I.N

Godwin Institute for Quaternary Research: Sedimentology Research Group. Presentation: The geochemistry and tephrastratigraphy of the Chatham Rise East of the Taupo Volcanic Zone, since the Last Glacial Maximum. Fogwill, C.J., Lean. C.B. and McCave, I.N.

European Union of Geosciences Conference 9 (1997). Presentation: The sortable silt grainsize proxy for palaeocurrent speed: Comparisons and precessions. McCave, I.N., Hall, I., Bianchi, G.G., Fogwill, C.J.

European Union of Geoscience Conference 9 (1997). Presentation: Deep water masses and climate change over the last 150 ka in the South West Pacific. Lean, C.B., McCave, I.N., Shackleton, N.J., Shieh, Y.-T., Fogwill, C.J., Pickard, N.A.H.

Orca Pod in Ryder Bay, near Rothera Research Station 2003
Killer