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49 results for “Terra Nova Bay”
Sea ice and wave breaking patterns during the Terra Nova Bay Polynya event on September 19, 2019, based on very high resolution satellite imagery
<p>Results of the WorldView-2 (WV2) panchromatic image analysis, described in Herman and Bradtke 2023 "Fetch-limited, strongly forced wind waves in waters with frazil and grease ice — spectral modelling and satellite observations in an Antarctic coastal polynya". The image, which cover part of the polynya in Terra Nova Bay, was taken on September 19, 2019 at 21:22 UTC. The spatial resolution of source data is 0.5 m.</p> <p>The zip file contains:</p> <ol> <li> “AOI” folder with the analyzed area outline in SHAPEFILE format</li> <li>“whitecaps” folder with breaking wave signatures (polygons) in SHAPEFILE format</li> <li>Sea ice (1) - water (2) mask in GeoTIFF format (0 means NoData)</li> </ol> <p>Data are provided in WGS 1984 / UTM Zone 58S projection (EPSG:32758)</p>
FIG. 8. — Microxina sarai n in Four new demosponge species from Terra Nova Bay (Ross Sea, Antarctica)
FIG. 8. — Microxina sarai n. sp.; A, paratype; B, skeletal architecture showing the ascending tracts of oxeas forming superficial brushes; C, thin, spicular ectosomal membrane; D, choanosomal skeleton; E, microxea; F, sigma. Scale bars: A, 1 cm; B, 2.5 mm; C, 140 µm; D, 700 µm; E, F, 10 µm.
FIG. 7. — Microxina lanceolata n in Four new demosponge species from Terra Nova Bay (Ross Sea, Antarctica)
FIG. 7. — Microxina lanceolata n. sp.; A, straight oxeas; B, sigmas; C, oxea extremities. Scale bars: A, 100 µm; B, C, 50 µm.
FIG. 4. — Ectyodoryx minuta n in Four new demosponge species from Terra Nova Bay (Ross Sea, Antarctica)
FIG. 4. — Ectyodoryx minuta n. sp.; A, holotype; B, detail of the sponge surface; C, ectosome; D, choanosomal skeleton; E, head of an echinating acanthostyle; F, I, extremities of anisotornotes; G, J, acanthostyles forming the choanosomal reticulation; H, group of sigmas; K, slender isochela; L, thick and arcuate isochela. Scale bars: A, 1 cm; B, 3 mm; C, 600 µm; D, 160 µm; E, H, K, L, 10 µm; F, I, 5 µm; G, 100 µm; J, 40 µm.
FIG. 3. — Iophon terranovae n in Four new demosponge species from Terra Nova Bay (Ross Sea, Antarctica)
FIG. 3. — Iophon terranovae n. sp.; A, oxeote-styles; B, tylote; C, slender style; D, palmate anisochelae; E, oxeote-style ends; F, bipocilla. Scale bars: A-C, 100 µm; D-F, 100 µm.
FIG. 2. — Iophon terranovae n in Four new demosponge species from Terra Nova Bay (Ross Sea, Antarctica)
FIG. 2. — Iophon terranovae n. sp.; A, paratype; B, C, thick ectosomal layer of vertically arranged acanthostyles (arrow) supported by the choanosomal reticulation; D, E, unequal ended bipocilla; F, G, bifid and hooked extremities of acanthostyles; H-J, palmate isochelae. Scale bars: A, 1 cm; B, C, 700 µm; D, F-J, 10 µm; E, 5 µm.
Vertically pointing doppler radar profiles (24 GHz Metek MRR-2) at Mario Zucchelli Station (Terra Nova Bay, Antarctica), aggregated to 5min, monthly netCDF archive
<p>Vertical profiles along the first kilometre of atmosphere above the ground (from 105 to 1050 m AGL) of equivalent radar reflectivity factor (Ze), Doppler velocity (W) and Doppler spectral width (Sw) from a 24-GHz vertically pointing Micro Rain Radar MRR-2 by METEK GmbH positioned at Mario Zucchelli Station (Terra Nova Bay, Antarctica).</p> <p>Metadata available at <a href="https://antarcticdatacenter.cnr.it/geonetwork/srv/api/records/6fe32f1f-247e-493d-9cd3-88714e5b38ef" target="_blank" rel="noopener">https://antarcticdatacenter.cnr.it/geonetwork/srv/api/records/6fe32f1f-247e-493d-9cd3-88714e5b38ef</a></p> <p>--------------------------------------------------------------------</p> <p>Example of netCDF file structure: </p> <h2>File "MZS_MRR_MeK_201912_5min.nc"</h2> <pre><strong> dimensions</strong>: <em>range </em>= 31; <em>time </em>= UNLIMITED; // (8928 currently) <strong>variables</strong>: float <em>Ze</em>(range=31, time=8928); :description = "Equivalent reflectivity factor relative to the most significant peak, dealiased, 5min non-logarithmic average. NaN means clear sky at the specified height."; :units = "dBZ"; :_ChunkSizes = 31U, 1U; // uint long <em>time_UTC</em>(time=8928); :description = "Measurement time. Timestamp indicates the end of the aggregation interval, e.g. 01-Mar-2020 00:05:00 represents the average of the variables between 01-Mar-2020 00:00:01 and 01-Mar-2020 00:05:00."; :time_zone = "UTC"; :units = "Seconds since 1970-01-01 00:00:00 (Unix time)."; :_ChunkSizes = 512U; // uint float <em>W</em>(range=31, time=8928); :description = "Mean Doppler Velocity of the most significant peak, dealiased, 5min average. Value not available in clear-sky conditions."; :units = "m s^-1"; :_ChunkSizes = 31U, 1U; // uint float <em>height</em>(range=31, time=8928); :description = "Height above instrument."; :units = "m"; :_ChunkSizes = 31U, 1U; // uint float <em>spectralWidth</em>(range=31, time=8928); :description = "Doppler Spectral Width of the most significant peak, dealiased, 5min average. Value not available in clear-sky conditions."; :units = "m s^-1"; :_ChunkSizes = 31U, 1U; // uint // <strong>global attributes</strong>: :<em>title </em>= "Micro rain radar data processed with IMProToo (Maahn, M. and Kollias, P., 2012), aggregated to 5min, monthly netCDF archive."; :<em>comment </em>= "IMProToo has been developed for improved snow measurements. Note that this data has been processed regardless of precipitation type."; :<em>time_label </em>= "Dec 2019"; :<em>source </em>= "Micro Rain Radar 2 (MRR-2), METEK GmbH, at MZS (Antarctica), frequency: 24 GHz, power: 50 mW, antenna diameter: 60 cm [https://metek.de/product/mrr-2/]"; :<em>institution </em>= "CNR-ISAC, Rome (IT)"; :<em>contact_person </em>= "Luca Baldini, CNR-ISAC, Rome (IT), l.baldini@isac.cnr.it"; :<em>location </em>= "Mario Zucchelli Station (Terra Nova Bay, Antarctica, 74°42\'S, 164°07\'E, 15 m a.s.l.)"; :<em>author </em>= "Giacomo Roversi, Ca\' Foscari University, Venice (IT) and CNR-ISAC, Rome (IT), g.roversi@isac.cnr.it"; :<em>creation_date </em>= "22-Oct-2024 17:40:46 UTC"; :<em>coverage </em>= "Monthly coverage (Dec 2019): 100 %"; :<em>time_resolution </em>= "5 minutes"; :<em>history </em>= "Created with IMProToo v0.107 [https://github.com/maahn/IMProToo], aggregated to 5 minutes temporal resolution with an average of the 1-minute values if least 3 out of 5 are not NaN."; </pre>
SWAN wave model simulations of the Terra Nova Bay Polynya
<p>Results of SWAN model simulations of the Terra Nova Bay Polynya, described in Herman and Bradtke 2023 "Fetch-limited, strongly forced wind waves in waters with frazil and grease ice — spectral modelling and satellite observations in an Antarctic coastal polynya".</p> <p>The zip file contains two folders:</p> <ol> <li>"swan", with subfolders:</li> </ol> <ul> <li>"input" (input grids, wind, and ice concentration for the ten polynya events)</li> <li>"S0" (SWAN input files and results for mode version S0)</li> <li>"S2_f5" (SWAN input files and results for mode version S2_f5)</li> </ul> <ol> <li>"Tp_from_satellite_swangrid" (peak wave periods and peak wave directions derived from satellite data, interpolated onto the grid of the SWAN model)</li> </ol> <p>Input files for other model versions discussed in the paper can be easily obtained by manipulating coefficients in *.swn files.</p> <p>The input files work with SWAN version 41.45</p>
Frazil streaks in the Terra Nova Bay Polynya from high-resolution visible satellite imagery
<p>Results of high-resolution (pixel size 10–15 m) visible satellite imagery analysis, described in Bradtke and Herman 2023 "Spatial characteristics of frazil streaks in the Terra Nova Bay Polynya from high-resolution visible satellite imagery" (https://tc.copernicus.org/articles/17/2073/2023/).</p> <p>The source data for analysis came from three satellite sensors: ALI (Advanced Land Imager), OLI (Operational Land Imager), and MSI (Multispectral Instrument). </p> <p>The dataset includes:</p> <ol> <li>results of frazil streaks detection in polynya, ice_water (ice =1, water=2, NoData=0)</li> <li>maps of spatially averaged characteristics of ice in polynya (NoData = -100): <ul> <li>ice concentration, Cfs (-),</li> <li>frazil streaks orientation, Thetafs (degrees clockwise from the north)</li> <li>width of frazil streaks, Wfs (m)</li> </ul> </li> <li>maps of spatially averaged wind-wave characteristics obtained from the Fourier analysis (NoData = -100):<br> <ul> <li>peak wave length, Lpeak (m)</li> <li>peak wave direction, Thetapeak (degrees clockwise from the north)</li> </ul> </li> </ol> <p>Data are provided in WGS 1984 / UTM Zone 58S projection (EPSG:32758), in raster grid with 10m resolution, in GeoTIFFformat.</p> <p>File name convention is: sensor_YYYYMMDD_variable.tif</p> <p> </p>
Snow hyperspectral measurements in Terra Nova Bay (Antarctica) and supplementary materials
<p>SISpec is a database containing spectroradiometric, snow and ancillary (environmental and meteorological) data acquired in polar environments. The project is the result of the co-operation of different expertise, and its main objective is to contribute to the knowledge of the interaction between microphysics characteristic of the snow cover and its reflection properties of the solar incident radiation and to study glacial environment and particularly to monitor the snow/ice covers by multispectral remote sensing data. Field surveys were performed in Antarctica, in the region where the Italian research station of Terra Nova Bay is located, the climatic characteristics and the low human impact allow to study snow/ice surfaces without impurities and with different characteristics with respect to those of the Arctic and the Alpine regions, where seasonal melting of the snow cover occur.</p>
Microstructure turbulence, conductivity-temperature-depth, and current velocity measurements of a submesoscale eddy in Terra Nova Bay (2018-2019)
Open the record for dataset details and reuse information.
FIG. 6. — Microxina lanceolata n in Four new demosponge species from Terra Nova Bay (Ross Sea, Antarctica)
FIG. 6. — Microxina lanceolata n. sp.; A, paratype; B, C, ectosomal oxeas which form tufts supporting the pore sieve membrane (arrow); D, areolate surface showing the inhalant sieves supported by the oxeas; E, oscule; F, choanosomal skeleton; G, lanceolate extremity of an oxea; H, sigma. Scale bars: A, 1 cm; B, 50 µm; C, 20 µm; D, E, 1.5 mm; F, 400 µm; G, H, 10 µm.
FIG. 1 in Four new demosponge species from Terra Nova Bay (Ross Sea, Antarctica)
FIG. 1. — Map of Terra Nova Bay (Ross Sea), with the location of the Italian Research Station (arrow) and of the sampling stations.
FIG. 9. — Microxina sarai n in Four new demosponge species from Terra Nova Bay (Ross Sea, Antarctica)
FIG. 9. — Microxina sarai n. sp.; A, oxeas; B, small sigmas; C, big, open sigmas; D, microxeas. Scale bars: A, 100 µm; B-D, 50 µm.
Figure 6 from: Cecchetto M, Alvaro MC, Ghiglione C, Guzzi A, Mazzoli C, Piazza P, Schiaparelli S (2017) Distributional records of Antarctic and sub-Antarctic Ophiuroidea from samples curated at the Italian National Antarctic Museum (MNA): check-list update of the group in the Terra Nova Bay area (Ross Sea) and launch of the MNA 3D model 'virtual gallery'. ZooKeys 705: 61-79. https://doi.org/10.3897/zookeys.705.13712
Figure 6 - Number of individuals by preservation method stored at MNA. Dried specimens percentage in orange (~80%), ethanol in blue (~15%), and frozen in green (~5%)
Figure 7 from: Cecchetto M, Alvaro MC, Ghiglione C, Guzzi A, Mazzoli C, Piazza P, Schiaparelli S (2017) Distributional records of Antarctic and sub-Antarctic Ophiuroidea from samples curated at the Italian National Antarctic Museum (MNA): check-list update of the group in the Terra Nova Bay area (Ross Sea) and launch of the MNA 3D model 'virtual gallery'. ZooKeys 705: 61-79. https://doi.org/10.3897/zookeys.705.13712
Figure 7 - Video of the 3D model of O. echinulata (MNA 2644); Catalogue number, latitude (DD), longitude (DD), depth and event date as described in the section "Dataset description", GenBank Accession number, Barcode Index Number from the Bold system and the complete COI sequence in FASTA format. Video available at: https://youtu.be/Sq6au-_CHy0
Figure 2 from: Cecchetto M, Alvaro MC, Ghiglione C, Guzzi A, Mazzoli C, Piazza P, Schiaparelli S (2017) Distributional records of Antarctic and sub-Antarctic Ophiuroidea from samples curated at the Italian National Antarctic Museum (MNA): check-list update of the group in the Terra Nova Bay area (Ross Sea) and launch of the MNA 3D model 'virtual gallery'. ZooKeys 705: 61-79. https://doi.org/10.3897/zookeys.705.13712
Figure 2 - Overview map depicting the wideness of the area containing the sampling stations of the dataset. Areas in red are shown in detail in figures 3, 4 and 5.
Figure 5 from: Cecchetto M, Alvaro MC, Ghiglione C, Guzzi A, Mazzoli C, Piazza P, Schiaparelli S (2017) Distributional records of Antarctic and sub-Antarctic Ophiuroidea from samples curated at the Italian National Antarctic Museum (MNA): check-list update of the group in the Terra Nova Bay area (Ross Sea) and launch of the MNA 3D model 'virtual gallery'. ZooKeys 705: 61-79. https://doi.org/10.3897/zookeys.705.13712
Figure 5 - Map with the sampling sites in the Falkland Islands (Islas Malvinas) and Bransfield Strait
Figure 1 from: Cecchetto M, Alvaro MC, Ghiglione C, Guzzi A, Mazzoli C, Piazza P, Schiaparelli S (2017) Distributional records of Antarctic and sub-Antarctic Ophiuroidea from samples curated at the Italian National Antarctic Museum (MNA): check-list update of the group in the Terra Nova Bay area (Ross Sea) and launch of the MNA 3D model 'virtual gallery'. ZooKeys 705: 61-79. https://doi.org/10.3897/zookeys.705.13712
Figure 1 - Flowchart depicting major steps in dataset development and publishing, from sample collection to the production of a virtual collection of the museum's 3D vouchers.
Figure 4 from: Cecchetto M, Alvaro MC, Ghiglione C, Guzzi A, Mazzoli C, Piazza P, Schiaparelli S (2017) Distributional records of Antarctic and sub-Antarctic Ophiuroidea from samples curated at the Italian National Antarctic Museum (MNA): check-list update of the group in the Terra Nova Bay area (Ross Sea) and launch of the MNA 3D model 'virtual gallery'. ZooKeys 705: 61-79. https://doi.org/10.3897/zookeys.705.13712
Figure 4 - Highlight of the sampling sites in Terra Nova Bay (a sampling locations from 1988 to 2004 b sampling locations from 2009 to 2014), Cape Hallett (c) and Cape Adare (d) areas.
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