Post by Dr. James Lea
I’m James Lea, and I’ve just started in the department as a new lecturer in glacial geomorphology.
My research looks at how glacial and geomorphic processes can aid our understanding of the past, present, and potential future behaviour of glaciers and ice sheets, though I also have more general interests in Quaternary environments, remote sensing, and numerical modelling techniques.
One of the main areas I research is the behaviour of tidewater glaciers (those that flow into the sea), since these are amongst the largest and fastest on the planet, and potentially the most likely drivers of future rapid sea level rise. I started to study these types of glaciers during my PhD at the University of Aberdeen, where I reconstructed the last 250 years of behaviour at the largest and most dynamic tidewater glacier in SW Greenland (the catchily named Kangiata Nunaata Sermia).
As part of this, I used a variety of information including satellite imagery, explorer’s photographs, geomorphology, and forgotten diaries of early Greenland colonists to reconstruct glacier positions. The result was the longest observation based record of tidewater glacier dynamics anywhere in Greenland, which I then was able to use to test whether a numerical model could adequately simulate the decadal to centennial behaviour of these glaciers.
Following my PhD, I moved from Aberdeen to Stockholm University, Sweden to take a postdoc position looking at performing simulations of the former Svalbard-Barents Sea Ice Sheet (north of Scandinavia) that existed during the last glacial. During this time I was also researching how iceberg calving processes are incorporated into ice sheet models, with the aim of improving how this significant but poorly understood mechanism of ice loss is represented.
In addition to these mostly model and remote sensing based studies, I also very much enjoy taking part in field-based research. Some of examples of this have included: nearly getting heat stroke in an Essex Quarry (Quantification of turbate structures through a subglacial till: dimensions and characteristics, Lea & Palmer, 2014); standing in a lake for 6 hours in the middle of the Swedish winter coring for sediments (Timing of the first drainage of the Baltic Ice Lake synchronous with the onset of Greenland Stadial 1, Muschitiello, Lea, et al., 2015); and hiking round Greenland for 4 weeks at a time carrying everything on my back (Terminus driven retreat of a major Greenlandic tidewater glacier during the early 19th century, Lea et al., 2014a; Fluctuations of a major Greenlandic tidewater glacier driven by changes in atmospheric forcing, Lea et al., 2014b).
If you have any questions just drop me an email (email@example.com), or call by my office (Rm404 in the Roxby Building) to say hello!