Greg H. Leonard
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View article: Assessing the Validity of a Green Infrastructure Conceptual Framework for Urban Transport Planning: Insights for Building Resilient Cities
Assessing the Validity of a Green Infrastructure Conceptual Framework for Urban Transport Planning: Insights for Building Resilient Cities Open
Green Infrastructure (GI) has increasingly been recognised as a crucial strategy for enhancing urban resilience, particularly in urban transportation systems facing the challenges of climate change. Although several conceptual frameworks f…
View article: A glimpse into the future: How the timing of sea ice formation influences associated microalgal communities
A glimpse into the future: How the timing of sea ice formation influences associated microalgal communities Open
This study investigates the impact of unseasonable storm events in McMurdo Sound, Antarctica, in 2022 on eukaryotic microalgal communities (EMCs). We assessed EMCs from the fast-ice and sub-ice platelet layer (SIPL) associated with fast-ic…
View article: The Interannual Variability of Antarctic Fast‐Ice Thickness in McMurdo Sound and Connections to Climate
The Interannual Variability of Antarctic Fast‐Ice Thickness in McMurdo Sound and Connections to Climate Open
Land‐fast sea‐ice (fast ice) in McMurdo Sound grows through heat loss to the atmosphere and through heat loss to the ocean due to the presence of supercooled water. In this paper, we present a fast‐ice thickness data set covering 1986–2022…
View article: Seasonal and diurnal variability of sub-ice platelet layer thickness in McMurdo Sound from electromagnetic induction sounding
Seasonal and diurnal variability of sub-ice platelet layer thickness in McMurdo Sound from electromagnetic induction sounding Open
Here, we present observations of temporal variability of sub-ice platelet layer over seasonal and diurnal timescales under Ice Shelf Water-influenced fast ice in McMurdo Sound. Electromagnetic induction (EM) sounding time-series measuremen…
View article: Comment on egusphere-2023-2724
Comment on egusphere-2023-2724 Open
Abstract. Here, we present observations of temporal variability of sub-ice platelet layer over seasonal and diurnal timescales under Ice Shelf Water-influenced fast ice in McMurdo Sound. Electromagnetic induction (EM) sounding time-series …
View article: Seasonal and diurnal variability of sub-ice platelet layer thickness in McMurdo Sound from electromagnetic induction sounding
Seasonal and diurnal variability of sub-ice platelet layer thickness in McMurdo Sound from electromagnetic induction sounding Open
Here, we present observations of temporal variability of sub-ice platelet layer over seasonal and diurnal timescales under Ice Shelf Water-influenced fast ice in McMurdo Sound. Electromagnetic induction (EM) sounding time-series measuremen…
View article: The Extraordinary March 2022 East Antarctica “Heat” Wave. Part I: Observations and Meteorological Drivers
The Extraordinary March 2022 East Antarctica “Heat” Wave. Part I: Observations and Meteorological Drivers Open
Between 15 and 19 March 2022, East Antarctica experienced an exceptional heat wave with widespread 30°–40°C temperature anomalies across the ice sheet. This record-shattering event saw numerous monthly temperature records being broken incl…
View article: The Extraordinary March 2022 East Antarctica “Heat” Wave. Part II: Impacts on the Antarctic Ice Sheet
The Extraordinary March 2022 East Antarctica “Heat” Wave. Part II: Impacts on the Antarctic Ice Sheet Open
Between 15 and 19 March 2022, East Antarctica experienced an exceptional heat wave with widespread 30°–40°C temperature anomalies across the ice sheet. In Part I, we assessed the meteorological drivers that generated an intense atmospheric…
View article: Monthly averaged fast-ice thickness in McMurdo Sound from a sea-ice monitoring station
Monthly averaged fast-ice thickness in McMurdo Sound from a sea-ice monitoring station Open
Updated monthly averaged fast-ice thickness on level first year fast ice in McMurdo Sound, Antarctica from a sea-ice monitoring station. Fast-ice thickness is derived from temperature measurements and manual drill hole measurements, and li…
View article: Monthly averaged fast-ice thickness in McMurdo Sound from a sea-ice monitoring station
Monthly averaged fast-ice thickness in McMurdo Sound from a sea-ice monitoring station Open
Updated monthly averaged fast-ice thickness on level first year fast ice in McMurdo Sound, Antarctica from a sea-ice monitoring station. Fast-ice thickness is derived from temperature measurements and manual drill hole measurements, and li…
View article: Monthly averaged fast-ice thickness in McMurdo Sound from a sea-ice monitoring station
Monthly averaged fast-ice thickness in McMurdo Sound from a sea-ice monitoring station Open
Monthly averaged fast-ice thickness on level first year fast ice in McMurdo Sound, Antarctica from a sea-ice monitoring station. Fast-ice thickness is derived from temperature measurements and manual drill hole measurements, and linearly i…
View article: Antarctic Landfast Sea Ice: A Review of Its Physics, Biogeochemistry and Ecology
Antarctic Landfast Sea Ice: A Review of Its Physics, Biogeochemistry and Ecology Open
Antarctic landfast sea ice (fast ice) is stationary sea ice that is attached to the coast, grounded icebergs, ice shelves, or other protrusions on the continental shelf. Fast ice forms in narrow (generally up to 200 km wide) bands, and ran…
View article: Fast Ice Thickness Distribution in the Western Ross Sea in Late Spring
Fast Ice Thickness Distribution in the Western Ross Sea in Late Spring Open
We present a 700 km airborne electromagnetic survey of late‐spring fast ice and sub‐ice platelet layer (SIPL) thickness distributions from McMurdo Sound to Cape Adare, providing a first‐time inventory of fast ice thickness close to its ann…
View article: The Effect of Pseudofrazil Particle Entrainment on Salinity Measurements
The Effect of Pseudofrazil Particle Entrainment on Salinity Measurements Open
Salinity effects of particles entrained into conductivity cells have previously mainly been studied in the context of suspended sediment. Particles influencing conductivity cells can also be small ice crystals (frazil) that may form in sup…
View article: Accuracy and precision when deriving sea-ice thickness from thermistor strings: a comparison of methods
Accuracy and precision when deriving sea-ice thickness from thermistor strings: a comparison of methods Open
A precise knowledge of landfast sea-ice (fast-ice) thickness is relevant to many different disciplines. Sea Ice Monitoring Stations (SIMS) are used to measure time series of fast-ice thickness at a location. SIMS measure ice and ocean temp…
View article: The effect of pseudofrazil particle entrainment on salinity measurements: Data
The effect of pseudofrazil particle entrainment on salinity measurements: Data Open
This experiment was designed to investigate the effect of entraining frazil ice particles found in supercooled ocean water by mimicking their effect through plastic particles of similar material properties as ice. This was done in order t…
View article: The effect of pseudofrazil particle entrainment on salinity measurements: Data
The effect of pseudofrazil particle entrainment on salinity measurements: Data Open
This experiment was designed to investigate the effect of entraining frazil ice particles found in supercooled ocean water by mimicking their effect through plastic particles of similar material properties as ice. This was done in order t…
View article: Combined measurement of snow depth and sea ice thickness by helicopter EM bird in McMurdo Sound, Antarctica
Combined measurement of snow depth and sea ice thickness by helicopter EM bird in McMurdo Sound, Antarctica Open
<p>Snow on sea ice is a controlling factor for ocean-atmosphere heat flux and thus ice thickness growth, and surface albedo. Active and passive microwave remote sensing is the most promising way to estimate snow depths over large sea…
View article: Brief communication: The anomalous winter 2019 sea-ice conditions in McMurdo Sound, Antarctica
Brief communication: The anomalous winter 2019 sea-ice conditions in McMurdo Sound, Antarctica Open
McMurdo Sound sea ice can generally be partitioned into two regimes: (1) a stable fast-ice cover, forming south of approximately 77.6∘ S around March–April and then breaking out the following January–February, and (2) a more dynamic region…
View article: Winter growth and tidal variability of the sub-ice platelet layer observed with electromagnetic induction soundings
Winter growth and tidal variability of the sub-ice platelet layer observed with electromagnetic induction soundings Open
Here, we present the first electromagnetic induction time-series measurements of ice shelf-influenced fast ice and sub-ice platelet layer thickness over winter and in late spring in McMurdo Sound. Significant increases in sub-ice platelet …
View article: Sea ice deformation and thickness in the Western Ross Sea
Sea ice deformation and thickness in the Western Ross Sea Open
<p>Sea ice cover is arguably the longest and best observed climate variable from space, with over four decades of highly reliable daily records of extent in both hemispheres. In Antarctica, a slight positive decadal trend in sea ice …
View article: Comment on tc-2020-352
Comment on tc-2020-352 Open
Abstract. McMurdo Sound sea ice can generally be partitioned into two regimes: (1)Â a stable fast-ice cover, forming south of approximately 77.6ââS around MarchâApril and then breaking out the following JanuaryâFebruary, and (2)Â a…
View article: Airborne mapping of the sub-ice platelet layer under fast ice in McMurdo Sound, Antarctica
Airborne mapping of the sub-ice platelet layer under fast ice in McMurdo Sound, Antarctica Open
Basal melting of ice shelves can result in the outflow of supercooled ice shelf water, which can lead to the formation of a sub-ice platelet layer (SIPL) below adjacent sea ice. McMurdo Sound, located in the southern Ross Sea, Antarctica, …
View article: Brief communication: The anomalous winter 2019 sea ice conditions in McMurdo Sound, Antarctica
Brief communication: The anomalous winter 2019 sea ice conditions in McMurdo Sound, Antarctica Open
McMurdo Sound sea ice can generally be partitioned into two regimes: (1) a stable fast-ice cover, forming south of approximately 77.6° S around March/April, then breaking out the following January/February; and, (2) a more dynamic region n…
View article: Sea Ice Thickness in the Western Ross Sea
Sea Ice Thickness in the Western Ross Sea Open
Using airborne measurements, we provide a first direct glimpse of the sea ice thickness distribution in the western Ross Sea, Antarctica, where the distinguishing sea ice process is the regular occurrence of the Ross Sea, McMurdo Sound, an…
View article: Observations of the Size Distribution of Frazil Ice in an Ice Shelf Water Plume
Observations of the Size Distribution of Frazil Ice in an Ice Shelf Water Plume Open
The size distribution of frazil ice is currently unconstrained in ice shelf cavity modeling. Here we observe the time‐dependent behavior of the number and size of frazil ice particles in an Ice Shelf Water plume. A novel acoustic scatterin…
View article: Airborne mapping of the sub-ice platelet layer under fast ice inMcMurdo Sound, Antarctica
Airborne mapping of the sub-ice platelet layer under fast ice inMcMurdo Sound, Antarctica Open
Basal melting of ice shelves can result in the outflow of supercooled ice shelf water, which can lead to the formation of a sub-ice platelet layer (SIPL) below adjacent sea ice. McMurdo Sound, located in the southern Ross Sea, Antarctica, …