Alarmist statements about retreating and thinning glaciers and the threat of glacier lake outburst floods (GLOFs) have caused heightened concern amongst local communities in high mountains. Debris covered glaciers and their associated lakes are at the heart of this debate, as their response to climate is variable and still an active research topic. Contradictory points of view of various research groups have led, in some instances, to a level of distrust of the science communicated to local communities, posing the need for meetings and activities to bridge different disciplines and backgrounds and to optimise and maximise our collective focus and productivity. The community of researchers interested in debris-covered glaciers is relatively recent but growing and pulls together researchers from different disciplines. Thus there is a need to (1) draw up consensus summaries of the state of the knowledge on these glacier systems and (2) deliver better communication of the key research findings to local communities.
The workshop started with an afternoon of expert talks summaziring the state of research on debris covered glaciers and lakes (abstracts of the talks are available here):
Dr Tobias Bolch – Mapping, area change and mass balance of debris-covered glaciers from space
Dr Evan Miles – Ice cliffs and supraglacial ponds: state of knowledge and research directions
Professor John Reynolds – An introduction to Glacial Lake Hazard Assessments
Dr Duncan Quincey – GAPHAZ – a Scientific Standing Group on high-mountain glacier and permafrost hazards
Dr Matt Westoby – GLOF modelling: state-of-the-art, opportunities, and complications
Dr Jonathan Carrivick – Impacts of glacier outburst floods within high mountain regions
Dr Scott Watson – Communicating earth observation data on Himalayan debris-covered glaciers and high mountain hazards
During the following two days, participants split into break-out sessions and addressed three main topics: 1) debris-covered glaciers; 2) glacial lake ranking schemes using remote sensing to assess hazard potential and 3) climate change and debris-covered glaciers. Additional smaller working groups focused on science communication and capacity building needs, drafted collaborative papers and developed a call for a PhD studentship. Some of the main conclusions of the workshop were:
Mapping the extent of debris covered glaciers is still a challenge despite improvements in remote sensing; an intercomparison study and a standardized open source tool is still pending
Protocols for estimating glacier outburst flood potentials are still needed, and should include a ‘first pass’ scheme using remote sensing followed by detailed field investigations
Capacity building initiatives are extremely valuable for local institutions and there is a need to support long term educational programs with support from local governments
In a collaborative BRAINSTORMING VISUALIZING PROCESSES, Naomi Lefroy, with input from Neil Glasser and Ian Willis, sketched a landscape map of a typical debris glacier ‘system’
Thanks to the Geological Society for hosting and supporting this meeting, and to all contributors for making such a successful workshop – what a great community!
FUNDING: We acknowledge the funding sources which made this workshop possible. We wish to thank the Geological Society for providing support and logistics in London. The IGCP 672 project, funded through UNESCO and IUGS has funded the participation of external project collaborators and co-leaders from Asia. The DISCOVER GLACIERS project funded through the from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 663830 is supporting the participation of project leader and workshop facilitator A. E. Racoviteanu using the Ser Cymru funds.