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92 results for “Beaufort Sea”
Coastal erosion and accretion areas along the Beaufort Sea and Laptev Sea Coasts based on Landsat 1999 - 2014
<p>The dataset covers the Laptev Sea coast from 120 to 168 E and Alaska and Canadian Beaufort Sea Coast from 130 to 168 W. </p> <p>Probabilities of erosion and accretion (change of land to water and visa versa) have been derived from Landsat for the time period 1999–2014. A probability threshold of 50% was applied to separate erosion and accretion areas which are provided as polygons (shape files).</p> <p>Further information regarding the algorithm is available in Bartsch et al. (2020). </p>
Figure 7 from: Valentich-Scott P, Powell II CL, Lorenson TD, Ewards BE (2014) A new genus and species of Thyasiridae (Mollusca, Bivalvia) from deep-water, Beaufort Sea, northern Alaska. ZooKeys 462: 11-26. https://doi.org/10.3897/zookeys.462.6790
Figure 7 - Comparison of adductor muscle scars and pallial lines of left valves of holotypes. A Maorithyas marama, holotype B Wallerconcha sarae, holotype C Spinaxinus sentosus, holotype. – Not to scale.
Figure 6 from: Valentich-Scott P, Powell II CL, Lorenson TD, Ewards BE (2014) A new genus and species of Thyasiridae (Mollusca, Bivalvia) from deep-water, Beaufort Sea, northern Alaska. ZooKeys 462: 11-26. https://doi.org/10.3897/zookeys.462.6790
Figure 6 - A–H Maorithyas hadalis, holotype, NSMT 71431, length = 26.7 mm, height = 24.1 mm, width = 13.4 mm. A Exterior of right valve B Exterior of left valve C Dorsal view of both valves D Close up of periostracum of right valve E Interior of left valve F Interior of right valve G Close up of hinge of left valve H Close up of hinge of right valve.
Figure 4 from: Valentich-Scott P, Powell II CL, Lorenson TD, Ewards BE (2014) A new genus and species of Thyasiridae (Mollusca, Bivalvia) from deep-water, Beaufort Sea, northern Alaska. ZooKeys 462: 11-26. https://doi.org/10.3897/zookeys.462.6790
Figure 4 - A–D Spinaxinus sentosus. A–G holotype, NMW.Z. 2002.108.1, length = 13.5 mm, height = 13.3 mm, width = 8.6 mm. A Exterior of right valve B Interior of left valve C Dorsal view of both valves D Scanning electron micrograph of periostracum, scale bar = 200 µm. Photo credit P. Graham Oliver and Anna M. Holmes, National Museum of Wales.
Figure 5 from: Valentich-Scott P, Powell II CL, Lorenson TD, Ewards BE (2014) A new genus and species of Thyasiridae (Mollusca, Bivalvia) from deep-water, Beaufort Sea, northern Alaska. ZooKeys 462: 11-26. https://doi.org/10.3897/zookeys.462.6790
Figure 5 - A–G Maorithyas marama, holotype, GNS–TM 305, length = 18.7 mm, height = 17.2 mm, width = 13.7 mm. A Exterior of right valve B Exterior of left valve C Dorsal view of both valves D Interior of left valve B Interior of right valve F Close up of hinge of left valve G Close up of hinge of right valve.
Figure 2 from: Valentich-Scott P, Powell II CL, Lorenson TD, Ewards BE (2014) A new genus and species of Thyasiridae (Mollusca, Bivalvia) from deep-water, Beaufort Sea, northern Alaska. ZooKeys 462: 11-26. https://doi.org/10.3897/zookeys.462.6790
Figure 2 - Shaded seafloor bathymetry showing shape and approximate dimension of the Canning seafloor mount. The core sites are shown as red dots.
Figure 3 from: Valentich-Scott P, Powell II CL, Lorenson TD, Ewards BE (2014) A new genus and species of Thyasiridae (Mollusca, Bivalvia) from deep-water, Beaufort Sea, northern Alaska. ZooKeys 462: 11-26. https://doi.org/10.3897/zookeys.462.6790
Figure 3 - A–H. Wallerconcha sarae gen. n., sp. n. A–H holotype, SBMNH 235481, length = 23.9 mm, height = 21.3 mm, width = 16.7 mm. A Exterior of right valve B Exterior of left valve C Dorsal view of both valves D Close up of periostracum of right valve E Interior of left valve F Interior of right valve G Close up of hinge of left valve H Close up of hinge of right valve.
Figure 1 from: Valentich-Scott P, Powell II CL, Lorenson TD, Ewards BE (2014) A new genus and species of Thyasiridae (Mollusca, Bivalvia) from deep-water, Beaufort Sea, northern Alaska. ZooKeys 462: 11-26. https://doi.org/10.3897/zookeys.462.6790
Figure 1 - Base map adapted from Jakobsson et al. (2008) showing the location of the Canning Seafloor Mound off the coast of northern Alaska.
Seismic evidence for a weakened thick crust at the Beaufort Sea continental margin
<p>This compressed folder contains raw seismic waveforms used to determine the three-dimensional seismic velocity structure beneath the Beaufort Sea continental margin of northwestern Canada.</p> <p>Estève, C.,<strong> </strong>Liu, Y., Koulakov, I., Schaeffer, A.J, and Audet, P., Seismic evidence for a weakened thick crust at the Beaufort Sea continental margin <em>(Geophysical Research Letters</em>).</p>
Recurring Spring Leads and Landfast Ice in the Beaufort and Chukchi Seas, 1993-2004, Version 1
This data set contains information on recurring spring leads and landfast ice extent in the Beaufort and Chukchi Seas. This data set maps and documents the spatial and temporal distribution of recurring leads and landfast ice in this area spanning 1993 through 2004 and are based on visible and infrared Advanced Very High Resolution Radiometer (AVHRR) data.
Ice Draft and Ice Velocity Data in the Beaufort Sea, 1990-2003, Version 1
This data set provides measurement of sea ice draft (m) and the movement of sea ice (cm/s) over the continental shelf of the Eastern Beaufort Sea. The data set spans April 1990 to September 2003. The data set was acquired to assist in determining the character and recurrence of ice features hazardous to offshore industrial activity, specifically for the exploitation of hydrocarbon reserves and the impact of climate variability and change on the Beaufort Sea ice regime. Observations were made using two types of self-contained Upward Looking Sonar (ULS) moored near the sea floor: an Ice Profiling Sonar (IPS) used to obtain ice draft data and an Acoustic Doppler Current Profiler (ADCP) used to obtain the ice velocity data.
AIDJEX Beaufort Sea Upward Looking Sonar April 1976, Version 1
This data contains Upward Looking Sonar (ULS) profiles of the underside of the Arctic pack ice along three transects whose total length is 777 nautical miles. The data were obtained by the USS Gurnard (SSN-662), a U.S. Navy submarine, on a traverse of the AIDJEX Main Experiment area in the Beaufort Sea from 07 April 1976 to 10 April 1976. The sea ice thickness derived from the ULS is given in feet.The data are in a single ASCII text file: Aidjex_04_1976_uls.txt. The data in this text file are not formatted into columns; all data are presented in one long row separated by spaces. Little is known about the format of the file, so caution should be used when working with the data. NSIDC is providing this data as part of our effort to preserve historical data. The data file begins with nine values that appear to be header information. These nine values include latitude and longitude values along with other unknown values. After the header, there are approximately 2100 measurements of what NSIDC believes is sea ice thickness in feet, however it is unclear how often these measurements were taken. After these 2100 values, another header of nine values occurs followed again by 2100 measurements. The file continues in this pattern through the remainder of the file. Users with information about the contents of the file are encouraged to contact <a href="mailto:nsidc.org">NSIDC User Services</a>.Two supporting documents that provide some background have been scanned and included as PDF files. These are AIDJEX_ULS_background.pdf and AIDJEX_ULS_format.pdf. These data are available via FTP. <strong>Note:</strong> These data are in a raw format with unknown fields and are being provided as is for preservation purposes. A processed version of the data are available in the <a href="/data/g01360.html">Submarine Upward Looking Sonar Ice Draft Profile Data and Statistics</a> data set.
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
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OpenNeuro
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