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Article
Open AccessThe climate sensitivity of northern Greenland fjords is amplified through sea-ice damming
Record-high air temperatures were observed over Greenland in the summer of 2019 and melting of the northern Greenland Ice Sheet was particularly extensive. Here we show, through direct measurements, that near ...
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Article
Open AccessRyder Glacier in northwest Greenland is shielded from warm Atlantic water by a bathymetric sill
The processes controlling advance and retreat of outlet glaciers in fjords draining the Greenland Ice Sheet remain poorly known, undermining assessments of their dynamics and associated sea-level rise in a war...
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Article
Open AccessThe International Bathymetric Chart of the Arctic Ocean Version 4.0
Bathymetry (seafloor depth), is a critical parameter providing the geospatial context for a multitude of marine scientific studies. Since 1997, the International Bathymetric Chart of the Arctic Ocean (IBCAO) h...
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Article
Open AccessThe Holocene retreat dynamics and stability of Petermann Glacier in northwest Greenland
Submarine glacial landforms in fjords are imprints of the dynamic behaviour of marine-terminating glaciers and are informative about their most recent retreat phase. Here we use detailed multibeam bathymetry t...
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Article
Erratum to: Sediment identification using free fall penetrometer acceleration-time histories
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Article
Sediment identification using free fall penetrometer acceleration-time histories
Knowledge of physical properties of near-surface sediments is an important requirement for many studies of the seafloor. Dynamic or Free Fall Penetrometers (FFP), instrumented with accelerometers, are widely u...
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Article
Frontiers in Seafloor Map** and Visualization
Over the past few years there have been remarkable and concomitant advances in sonar technology, positioning capabilities, and computer processing power that have revolutionized the map**, imaging and explor...
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In-Situ Determination of the Variability of Seafloor Acoustic Properties: An Example from the Onr Geoclutter Area
In support of the US ONR-sponsored Geoclutter program, we have developed, built, and deployed a relatively inexpensive, robust, small-ship-deployable device (ISSAP — In situ Sound Speed and Attenuation Probe) for...
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Chapter
Drumlins in Lake Ontario
Lake Ontario (74 m above sea level) is located 150–250 km north of the Late Wisconsinan southern limit of the Laurentide Ice Sheet in North America (Figure 1). Multibeam bathymetric map** in deep eastern Lak...
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Article
Shallow-water imaging multibeam sonars: A new tool for investigating seafloor processes in the coastal zone and on the continental shelf
Hydrographic quality bathymetry and quantitative acoustic backscatter data are now being acquired in shallow water on a routine basis using high frequency multibeam sonars. The data provided by these systems p...
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Article
Three-dimensional visualization of orbital forcing and climatic repsonse: Interactively exploring the pacemaker of the ice ages
Recent developments in continuous core-logging techniques now permit us to recover the high-resolution time series necessary for the detailed spectral analyses of paleoclimatic proxy records. When applied to l...
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Article
Extraction of high-resolution carbonate data for palaeoclimate reconstruction
TEMPORAL variations in the calcium carbonate content of deepsea sediments provide direct stratigraphic as well as important palaeoenvironmental information relating to the global carbon cycle. Here I present a...
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Article
The morphology and tectonics of the Mark area from Sea Beam and Sea MARC I observations (Mid-Atlantic Ridge 23° N)
High-resolution Sea Beam bathymetry and Sea MARC I side scan sonar data have been obtained in the MARK area, a 100-km-long portion of the Mid-Atlantic Ridge rift valley south of the Kane Fracture Zone. These d...
