A5059912303- Aeolian processes and effects
- Soil erosion and sediment transport
- Geology and Paleoclimatology Research
- Coastal and Marine Dynamics
- Hydrology and Sediment Transport Processes
- Coastal wetland ecosystem dynamics
- Remote Sensing and LiDAR Applications
- Tree Root and Stability Studies
- Coastal and Marine Management
- Geological formations and processes
- Maritime and Coastal Archaeology
- Superconducting and THz Device Technology
- Planetary Science and Exploration
- Landslides and related hazards
- Tropical and Extratropical Cyclones Research
- Marine and coastal plant biology
- 3D Surveying and Cultural Heritage
- Lichen and fungal ecology
- Space Exploration and Technology
- Botany, Ecology, and Taxonomy Studies
- Methane Hydrates and Related Phenomena
- Rangeland and Wildlife Management
- Cryospheric studies and observations
- Archaeology and ancient environmental studies
- Calibration and Measurement Techniques
University of California, Santa Barbara
2020-2025
Cardiff University
2003-2024
Arizona State University
2016-2021
Southwest Research Institute
2021
Northern Arizona University
2021
Planetary Science Institute
2021
Cornell University
2021
University of California, Los Angeles
2021
Jet Propulsion Laboratory
2021
Stanford University
2021
Recent research literature on secondary airflow and sediment transport patterns over flow-transverse dunes is reviewed. Various issues surrounding the behaviour, modelling sedimentological implications of near-surface dynamics are discussed, including: Law Wall; Jackson Hunt model; effects streamline compression, acceleration curvature stoss slope shear stress; and, in particular, recent efforts to characterize lee-side patterns. A revised conceptual model presented areas for further...
Abstract This paper presents results from a study designed to explore the effects of beach surface moisture and fetch on threshold movement, intensity sand transport by wind mass flux. The experiment was carried out over period five weeks at Greenwich Dunes, Prince Edward Island, Canada in May June 2002. Moisture content measured with Delta‐T probe 50 m 25 grid established beach. Measurements speed direction were made arrays cup anemometers two‐dimensional sonic anemometer. Transport height...
ABSTRACT Evidence from a field study on wind flow and sediment transport across beach–dune system under onshore offshore conditions (including oblique approach angles) indicates that response the back‐beach stoss slope of foredune can be exceedingly complex. The upper‐air – measured by sonic anemometer at top 3·5 m tower located dune crest is similar to regional records obtained nearby meteorological station, but quite different near‐surface locally profile anemometers positioned 20 cm above...
By linking iterative learning and knowledge generation with power-sharing, adaptive co-management (ACM) provides a potential solution to resolving complex social-ecological problems. In this paper we evaluate ACM as mechanism for conservation conflict using case study in Scotland, where seal salmon fishery stakeholders have opposing entrenched objectives. emerged 2002, successfully long-standing conflict. Applying evaluation approaches from the literature, 2011 interviewed characterise...
Abstract The form, height and volume of coastal foredunes reflects the long‐term interaction a suite nearshore aeolian processes that control amount sand delivered to foredune from beach versus removed or carried inland. In this paper, morphological evolution more than six decades is used inform development simple computer model simulates growth. suggestion by others increased steepness seaward slope will retard sediment supply due flow stagnation zone in front foredune, hence limiting...
Abstract Topographic interactions generate multidirectional and unsteady airflow that limits the application of velocity profile approaches for estimating sediment transport over dunes. Results are presented from a series wind tunnel simulations using Irwin‐type surface‐mounted pressure sensors to measure shear stress variability directly at surface both isolated closely spaced sharp‐crested model Findings complement existing theories on secondary effects stoss dynamics provide new information...
ABSTRACT The purpose of this study was to quantify relationships between season, sediment availability, transport pathways, and beach/foredune morphology at Greenwich Dunes, PEI. This done for periods ranging from a few days multiple decades using erosion pins, bedframe measurements, annual surveys, digital photogrammetry historical aerial photographs. relative significance seasonal/annual processes versus response the foredune system broader geomorphic controls (e.g. sea level rise, storms,...
ABSTRACT Wind flow and sand transport intensity were measured on the seaward slope of a vegetated foredune during 16 h storm using an array sonic anemometers Wenglor laser particle counters. The had compound with wave‐cut scarp about 0.5 m high separating upper portion from lower dune ramp, which was bare vegetation. direction veered obliquely offshore at start event to onshore peak finally directly final 2 as wind speed dropped below threshold. Sand initially inhibited by brief period rain...
Post-glacial sea level dynamics during the last 15,000 calendar years are highly variable along Pacific coast of Canada. During Last Glacial Maximum, Earth's crust was depressed by ice loading mainland inner and relative levels were as much 200 m higher than today. In contrast, some outer coastal areas experienced a glacial forebulge (uplift) effect that caused to drop 150 below present levels. Between these coasts, we hypothesize there would have been an area where remained relatively...
High-frequency measurements of airflow from ultrasonic anemometers and time-averaged cup anemometer profiles were taken during an oblique alongshore sand-transporting event (6.7 m/s) over a vegetated foredune in May 2002 as part larger study on the sedimentary dynamics beach-dune complex Greenwich Dunes, Prince Edward Island National Park, Canada. Local flow sand transport pathways deviated significantly regional wind because topographic steering beach back toward backshore. Flow decelerated...
ABSTRACT Near‐surface airflow over a morphologically simple, vegetated, 8 m high foredune with small wave‐cut scarp was measured for onshore to oblique‐onshore conditions during low‐moderate (5–6 s ‐1 ) wind event and velocity (11–18 sand‐transporting gale event. Flow across the characterized by significant flow compression acceleration up both events. During gale, pronounced jet (speed bulge) developed at crest, which increased in magnitude increasing speed. The vertical (W) component of 3D...
Abstract The impact of waves, storm surge, and aeolian transport associated with Post-tropical Storm Fiona (offshore significant wave height ∽ 8 m, surge up to 2 m) on the sandy beaches foredunes north shore Prince Edward Island National Park (PEINP), Canada, are assessed. Management policies practices, as they apply beach systems within PEINP, reviewed in context shoreline changes attributed Fiona. effectiveness these practices evaluated inform potential performance beach-foredune natural...