A5082636536- Cryospheric studies and observations
- Climate change and permafrost
- Geology and Paleoclimatology Research
- Landslides and related hazards
- Winter Sports Injuries and Performance
- Arctic and Antarctic ice dynamics
- Geological formations and processes
- Polar Research and Ecology
- Hydrology and Sediment Transport Processes
- Methane Hydrates and Related Phenomena
- Flood Risk Assessment and Management
- Hydrology and Watershed Management Studies
- Remote Sensing and LiDAR Applications
- Freshwater macroinvertebrate diversity and ecology
- 3D Surveying and Cultural Heritage
- Fish Ecology and Management Studies
- Soil erosion and sediment transport
- Aquatic Invertebrate Ecology and Behavior
- Seismic Imaging and Inversion Techniques
- Aeolian processes and effects
- Pleistocene-Era Hominins and Archaeology
- earthquake and tectonic studies
- Peatlands and Wetlands Ecology
- Planetary Science and Exploration
- Geophysics and Gravity Measurements
University of Leeds
2016-2025
University of Maine
2016
University of Essex
2016
Loughborough University
2016
University of Copenhagen
2015
Keele University
2001-2012
Newcastle University
2007
Accurate, precise and rapid acquisition of topographic data is fundamental to many sub-disciplines physical geography. Technological developments over the past few decades have made fully distributed sets centimetric resolution accuracy commonplace, yet emergence Structure from Motion (SfM) with Multi-View Stereo (MVS) in recent years has revolutionised three-dimensional surveys geography by democratising collection processing. SfM-MVS originates fields computer vision photogrammetry,...
A deadly cascade catastrophic landslide in Uttarakhand state India on February 2021 damaged two hydropower plants, and more than 200 people were killed or are missing. Shugar et al. describe the of events that led to this disaster. massive rock ice avalanche roared down a Himalayan valley, turning into debris flow upstream from first plants. The sequence highlights increasing risk Himalayas caused by increased warming development. Science , abh4455, issue p. 300
Abstract We describe and model the evolution of a recent landslide, tsunami, outburst flood, sediment plume in southern Coast Mountains, British Columbia, Canada. On November 28, 2020, about 18 million m 3 rock descended 1,000 from steep valley wall traveled across toe glacier before entering 0.6 km 2 lake producing >100‐m high run‐up. Water overtopped outlet scoured 10‐km long channel depositing debris on 2‐km fan below outlet. Floodwater, organic debris, fine entered fjord where it...
On 3 October 2023, a multihazard cascade in the Sikkim Himalaya, India, was triggered by 14.7 million m3 of frozen lateral moraine collapsing into South Lhonak Lake, generating an ~20 m tsunami-like impact wave, breaching moraine, and draining ~50 water. The ensuing Glacial Lake Outburst Flood (GLOF) eroded ~270 sediment, which overwhelmed infrastructure, including hydropower installations along Teesta River. physical scale human economic this event prompts urgent reflection on role climate...
Permafrost peatlands contain globally important amounts of soil organic carbon, owing to cold conditions which suppress anaerobic decomposition. However, climate warming and permafrost thaw threaten the stability this carbon store. The ultimate fate their stores is unclear because complex feedbacks between peat accumulation, hydrology vegetation. Field monitoring campaigns only span last few decades therefore provide an incomplete picture peatland response recent rapid warming. Here we use a...
Abstract. Region-wide averaging of Himalayan glacier mass change has masked any catchment or glacier-scale variability in recession; thus the role a number glaciological processes wastage remains poorly understood. In this study, we quantify loss rates over period 2000–2015 for 32 glaciers across Everest region and assess how future ice is likely to differ depending on hypsometry. The mean balance all our sample was −0.52 ± 0.22 m water equivalent (w.e.) a−1. nine lacustrine-terminating...
The impact of glacial lake development on the evolution glaciers in Himalaya is poorly quantified, despite increasing prevalence supraglacial and proglacial water bodies throughout region. In this study we examine changes geometry, velocity surface elevation nine lake-terminating land-terminating Everest region central over time period 2000 to 2015. examined all decelerated (mean change −0.16 −5.60 m a −1 for different glaciers), thinned most their middle reaches, developed more gently...
Structure from motion (SfM) has seen rapid uptake recently in the fluvial and aquatic sciences. This is not least due to widespread availability of cheap unmanned aerial vehicles/drones, which help mitigate challenging terrain deliver efficient reproducible high‐accuracy images topographical data. These data can have unprecedented spatio‐temporal coverage includes measurements topography, hydraulics, geomorphology habitat quality. SfM also offer novel quantification underwater archeology,...
Himalayan glaciers are undergoing rapid mass loss but rates of contemporary change lack long-term (centennial-scale) context. Here, we reconstruct the extent and surfaces 14,798 during Little Ice Age (LIA), 400 to 700 years ago. We show that they have lost at least 40 % their LIA area between 390 586 km3 ice; 0.92 1.38 mm Sea Level Equivalent. The rate ice since has been - 0.011 0.020 m w.e./year, which is an order magnitude lower than reported in literature. Rates depend on monsoon...
The Kangerlussuaq area of southwest Greenland encompasses diverse ecological, geomorphic, and climate gradients that function over a range spatial temporal scales. Ecosystems from the microbial communities on ice sheet moisture-stressed terrestrial vegetation (and their associated herbivores) to freshwater oligosaline lakes. These ecosystems are linked by dynamic glacio-fluvial-aeolian geomorphic system transports water, geological material, organic carbon nutrients glacier surface adjacent...
Abstract Ice‐contact proglacial lakes are generally absent from numerical model simulations of glacier evolution, and their effects on ice dynamics rates deglaciation remain poorly quantified. Using the BISICLES flow model, we analyzed an ice‐contact lake Pukaki Glacier, New Zealand, during recession Last Glacial Maximum. The produced a maximum effect grounding line >4 times further velocities up to 8 faster, compared land‐terminating forced by same climate. contributed 82% cumulative 87%...
Global climate change is evidently manifest in disappearing mountain glaciers and receding thinning ice sheet margins. Concern about contemporaneous proglacial lake development has spurred an emerging area of research seeking to quantitatively understand - glacier interactions. This perspectives article identifies spatio-temporal disparity between the coverage field data, remote sensing observations numerical modelling efforts. Throughout, overview physical effects ice-marginal lakes on...
Abstract Ice marginal lakes are a dynamic component of terrestrial meltwater storage at the margin Greenland Sheet. Despite their significance to sea level budget, local flood hazards and bigeochemical fluxes, there is lack Greenland-wide research into ice lakes. Here, detailed multi-sensor inventory Greenland’s presented based on three well-established detection methods form unified remote sensing approach. The consists 3347 ( $$\pm 8$$ <mml:math...
Abstract Glaciers and ice caps (GICs) are important contributors of meltwater runoff to global sea level rise. However, knowledge GIC mass changes is largely restricted the last few decades. Here we show extent 5327 Greenland GICs during Little Ice Age (LIA) termination (1900) reveal that they have fragmented into 5467 glaciers in 2001, losing at least 587 km 3 from their ablation areas, equating 499 Gt a rate 4.34 yr −1 . We estimate long‐term mean balance glacier areas has been −0.18 −0.22...