The Terrestrial Team

Jemma Wadham

University of Bristol

Principal Investigator

Jemma is the lead scientist on Project PISCES. She is a glacial biogeochemist, with an interest in improving our understanding of how glaciers and ice sheets interact with the rest of the planet and how this will change in a warming world. She is a field scientist and will be involved in fieldwork on PISCES, including driving from one end of Patagonia to the other, sampling its many rivers with a view to working out what the effect of vanishing ice cover might mean for downstream ocean ecosystems. In her spare time she enjoys riding her horse, and spending time with her golden Lab Poppydog.

Martyn Tranter

University of Bristol


MT is Professor of Polar Biogeochemistry at the Bristol Glaciology Centre. His research interests include interactions between microbes, minerals and water in glacial enviornments. He is lead PI of the Black and Bloom Project ( He is an avid Bath, Ebbw Vale, Wales, Wolves, Mets and Fins fan. He tends an allotment for therapy. His PISCES role is to help conceptualise bigeochemical cycling in the glacier systems.

Andrés Rivera

Centro de Estudios Cientificos


Andrés is the senior glaciologist of the Glaciology laboratory at CECs. He is also associated professor of the Department of Geography, at the University of Chile. Andrés has conducted and participated in research projects related to glaciers located all along the country and Antarctica, including remote sensing, LiDAR, radar, GPS, among other surveying methods. He will be contributing his glaciological expertise to the PISCES project.

Jon Hawkings

University of Bristol

Researcher Co-I

Jon is the first of two appointed post doctoral research associate on the PISCES project. His research has focused on the coldest areas of our planet, and he has recently been looking into the potential impact that ice sheets and glaciers play in downstream and marine ecosystems. He  completed his PhD on nutrient export from the Greenland Ice Sheet at the University of Bristol in 2015, and has been a post doctoral researcher on the same project for the past year. Aside from helping to organise the logistics of fieldwork in Patagonia, his role in PISCES will be to characterise the land to ocean freshwater inputs at both the glaciated and unglaciated field sites. He will also be lending a hand on the fjord fieldwork, assessing the biogeochemical response to these freshwater inputs.

In his spare time Jon enjoys brewing his own (occasionally undrinkable) beer, eating good food, and suffering as an Arsenal supporter.

Alejandro Dussaillant

Universidad de Aysen/CIEP (Chile)

Research Collaborator

Ale is an engineering hydrologist from Chile, with two decades experience in water resources in general. Since 2008 he has worked on Patagonian Glacial Lake Outburst Floods (GLOF - hence his nickname "GLOFito"), Patagonian catchment hydrology, fluvial hydraulics and geomorphology. Ale conducted his PhD in UW Madison, Wisconsin, before moving back to Chile where he worked as a researcher at Universidad Catolica, then at Universidad de Concepcion. He moved to London, England, in 2009, where he was based until joining the Universidad de Aysen as Research Director in 2017. Ale is a big fan of rugby, enjoys pisco, and being back in Patagonia conducting fieldwork (and driving those dirt roads). He will be part of the initial recce team, and lend his valuable expertise in the field.

Matthew Marshall

University of Bristol

PhD Student

Matthew is working towards a PhD at the University of Bristol, studying how glaciers influence chemical nutrient cycles. He is especially interested in the organic matter in glacial meltwaters, investigating where it comes from and how it might be used by microbes.  A better grasp of these processes will help to understand how glaciers might support ecosystems in Patagonian fjords and also if they are vulnerable to shrinking ice cover as a result of climatic change. He is excited to be working with the PISCES team and is particularly looking forward to working in remote Patagonia – doing without the shackles of modern life (computers, phones, emails) for a while sounds like heaven!

Alejandra Urra

University of Bristol

PhD Student

Alejandra is a marine biologist, currently carrying out her PhD via BECAS Chile, CONICYT. She graduated from Universidad Austral de Chile in 2012 including an internship in snow microbiology in Centro de Estudios Cientificos. She brought her BECAS scholarship to the University of Bristol in 2013.   Her PhD focusses upon impact of microbial communities on glacier environments and how this feature is link to the biogeochemical cycles in the glacier. She is particularly interested in macro-nutrient changes in the proglacial plain and the chemical weathering efficiencies in different glaciated catchments. She is looking forward to continue her research in Patagonia, loving the tin food, piscolate and the rain!

Anne Kellerman

Florida State University

Postdoctoral researcher/Research collaborator

Anne is a postdoctoral researcher in the Earth, Ocean, and Atmospheric Sciences department at Florida State University. Her work focuses on the detailed chemical characterization of dissolved organic matter in aquatic systems, particularly carbon pools that are vulnerable to anthropogenic impacts including changes in climate and land use. She completed her PhD on molecular-level controls of dissolved organic matter in lakes at Uppsala University, Sweden in 2015. In the PISCES project, Anne will assume the role as the dissolved organic matter expert on the river transect and at the glaciated field site. Her goal is to understand how the composition of dissolved organic matter will change with deglaciation and how this will affect downstream reactivity to microbial degradation.

Rory Burford

University of Bristol

MScR Student

Rory is an analytical chemist by trade, but has been recently converted to glaciology. His thesis examines two alternative sources of deep ice that may be accessible when direct sampling is impossible. To that end, in Patagonia he will be collecting samples from calved icebergs with the aid of an ice axe and an inflatable kayak (what could go wrong?). He will also assist with daily sampling from the Rio Huemules. Rory is especially interested in the 𝛿2H/𝛿18O isotopic signature of water molecules, as he believes that it may indicate the present glacial contribution to a river with partial glacial input. This could potentially enable future researchers to monitor the rate of melt for a remote glacier in real time.

Away from the lab, Rory's current hobbies of choice are orienteering, triathlon and guitar - although he's dreaming up new ways to injure himself all the time.