A5044090291- Cryospheric studies and observations
- Landslides and related hazards
- Geology and Paleoclimatology Research
- Urban Heat Island Mitigation
- Agriculture and Rural Development Research
- Climate change and permafrost
- Cocoa and Sweet Potato Agronomy
- Lichen and fungal ecology
- Rangeland Management and Livestock Ecology
- Soil Geostatistics and Mapping
- Calibration and Measurement Techniques
- Geological formations and processes
- Winter Sports Injuries and Performance
- Atmospheric and Environmental Gas Dynamics
- Agricultural Innovations and Practices
- Fire effects on ecosystems
- Species Distribution and Climate Change
- Remote Sensing and Land Use
- Ruminant Nutrition and Digestive Physiology
- Methane Hydrates and Related Phenomena
- Biocrusts and Microbial Ecology
- Flood Risk Assessment and Management
- Peatlands and Wetlands Ecology
- Microwave and Dielectric Measurement Techniques
- Soil Carbon and Nitrogen Dynamics
University of Auckland
2023-2024
National Centre for Earth Observation
2020-2022
King's College London
2019-2022
University of Leicester
2021
World Conservation Monitoring Centre
2020-2021
Institute of Geography of the Slovak Academy of Sciences
2019
Lund University
2013-2018
Geospatial Research (United Kingdom)
2018
Quaternary Research Association
2016
Abstract Surface crevasses on the Greenland Ice Sheet (GrIS) capture nearly half of seasonal runoff, yet their role in transferring meltwater to bed has received little attention relative that supraglacial lakes and moulins. Here, we present observations crevasse ponding investigate controls hydrological behavior at a fast‐moving, marine‐terminating sector GrIS. We map surface meltwater, crevasses, surface‐parallel stress across ∼2,700 km 2 region using satellite data contemporaneous...
Abstract Subglacial bed forms (drumlins, ribbed moraines, and megascale glacial lineations) are enigmatic repetitive flow‐parallel flow‐transverse landforms common in glaciated landscapes. Their evolution morphology a potentially powerful constraint for ice sheet modeling, but there is little consensus on form dynamics or formative mechanisms. Here we explore shallow sediment via simple model that iterates (i) down‐flow till flux, (ii) pressure gradient‐driven (iii) entrainment deposition of...
A contemporary trend in glacial geomorphology is the quest for a unifying theory of drumlin and ribbed moraine formation. Three Swedish example areas each are here newly mapped, using high-resolution Light Detecting Ranging (LiDAR) data. From previous studies these areas, we know that they formed differently, one by melt-out stagnant debris-zonated ice, another remoulding pre-existing landforms third active subglacial stacking folding sediment into proto ridges, contemporaneously with...
Biocrusts (topsoil communities formed by mosses, lichens, bacteria, fungi, algae, and cyanobacteria) are a key biotic component of dryland ecosystems. Whilst climate patterns control the distribution biocrusts in drylands worldwide, terrain soil attributes can influence biocrust at landscape scale. Multi-source unmanned aerial vehicle (UAV) imagery was used to map study ecology typical ecosystem central Spain. Red, green blue (RGB) processed using structure-from-motion techniques related...
In this paper we synthesise previous sedimentological studies and new, high resolution, digital elevation models (DEMs) from southern Småland to investigate the evolution of a deglacial landscape. Starting approximately at highest shoreline, there is 20– 40-km-wide zone ribbed hummocky moraine that can be connected predominantly subaqueous Göteborg moraine. North dramatic shift into streamlined terrain. Based on investigations conclude these zones represent sub/supraglacial stagnant-ice...
This letter outlines the abilities and potential applications of Swedish 'Ny Nationell Höjdmodell' (new national height model), with particular reference to mapping Quaternary landforms. The application high-resolution, light-detection ranging data allows terrain in an unprecedented level detail, even under dense forest cover that has previously hidden key features from view. new set can be applied a variety ways: digital morphological analysis production field reconnaissance maps when...
Using the LiDAR-derived Swedish national height model we have identified previously undescribed shallow streamlined glacial bedforms, small-scale drumlins, on Närke plain in south-central Sweden. These drumlins could only be detected with high-resolution LiDAR, due to both their subtle size and forest cover. In this area ice margin receded a subaqueous environment proglacial water depth order of 100 m during last deglaciation. As indicated by configuration marginally formed De Geer moraine...
Few very small drumlins are typically mapped in previously glaciated landscapes, which might be an important signature of subglacial processes or observational artefact. One hundred and forty-three newly emergent drumlins, recently sculpted by the Múlajökull glacier, have been using high-resolution LiDAR aerial photographs addition to field surveying. In this paper, these used as evidence that few (e.g., height H 4 m, width W 40 length L 100 m) produced; at least, survive pass outside ice...
Satellite-derived land surface temperature (LST) data are most commonly observed in the longwave infrared (LWIR) spectral region. However, such suffer frequent gaps coverage caused by cloud cover. Filling these ‘cloud gaps’ usually relies on statistical re-constructions using proximal clear sky LST pixels, whilst this is often a poor surrogate for shadowed LSTs insulated under cloud. Another solution to rely passive microwave (PM) that largely unimpeded cover impacts, quality of which,...
Multisensor capacitance probes (MCPs) have traditionally been used for soil moisture monitoring and irrigation scheduling. This paper presents a new application of these probes, namely the simultaneous ponded water level, moisture, temperature profile, conditions which are particularly important rice crops in temperate growing regions grown with prolonged periods drying. WiFi-based loggers to concurrently collect data from MCPs ultrasonic distance sensors (giving an independent reading...
Correct specification of a target’s longwave infrared (LWIR) surface emissivity has been identified as one the greatest sources uncertainty in remote sensing land temperature (LST). Field and laboratory measurements are essential for improving validating LST retrievals, but there differing approaches to making such conditions that they made under can affect their performance. To better understand these impacts we fourteen manmade natural samples different environmental conditions, both situ...
Surface crevasses on the Greenland Ice Sheet capture nearly half of seasonal runoff, yet their role in transferring meltwater to bed has received little attention compared that supraglacial lakes and moulins. Here, we present observations crevasse ponding investigate controls hydrological behaviour at a fast-moving, marine-terminating sector Sheet. We map surface meltwater, crevasses, surface-parallel stress across ~2,700 km² region using satellite data contemporaneous uncrewed aerial...
Abstract BACKGROUND This study compares standard regulatory methodology (fixed scenarios and models) to spatial modelling at a 1 km landscape resolution for the evaluation of predicted environmental concentrations pesticides in groundwater. The use decision‐making processes is discussed three options sub‐national restriction substances based on fate are examined. Wheat sugar beet tested with two modified FOCUS (A D) PEARL GeoPEARL models. 80th percentile value time space, aggregated...
Aotearoa New Zealand's rapidly growing aerospace sector is still in its infancy, which presents us with the unique opportunity to incorporate sustainability as a key performance parameter from outset. Through surveys and interviews stakeholder groups, we show that currently, largely deprioritises environmental compliance Te Tiriti o Waitangi favour of economic growth. Actors are not incentivised consider any aspects sustainability. While concerns acknowledged, they often viewed technical...
Earth and Space Science Open Archive This work has been accepted for publication in Journal of Geophysical Research - Surface. Version RecordESSOAr is a venue early communication or feedback before peer review. Data may be preliminary. Learn more about preprints. preprintOpen AccessYou are viewing the latest version by default [v2]Controls on water storage drainage crevasses Greenland Ice SheetAuthorsThomas RussellChudleyiDPoulChristoffersenSamuel...