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26 results for “Livingston Island”
Air/Snow temperature vertical profiles at different nodes of the 'Limnopolar Lake' CALM site, in Byers Península Livingston Island, Antarctica (2013-2022)
<div> <div> </div> </div> <div> <p>Air or seasonal snow temperature data were collected at different heights above the ground between 2013 and 2022 using an array of temperature micro-loggers (iButton models by Maxim) mounted on vertical wooden masts. These measurements were conducted at various nodes within the 100x100 m 'Limnopolar Lake' CALM site (A25) grid of the PERMATHERMAL network, managed by the University of Alcalá, Madrid, Spain, to monitor active layer thickness on Byers Peninsula, Livingston Island, South Shetland Islands, Antarctica.</p> <p>In 2013, nine arrays were installed at nodes with relative coordinates (00,00), (00,05), (00,10), (05,00), (05,05), (05,10), (10,00), (10,05), and (10,10). Measurements were taken at heights of 2.5, 5, 10, 15, 20, 25, 30, and 40 cm above the ground surface using DS1921G iButton loggers, which recorded air/snow temperatures every 4 hours. This experiment, referred to as 'Mini', was active for only one year and is now discontinued.</p> <p>Between 2017 and 2022, three arrays were installed at nodes (00,00), (05,05), and (10,10). These arrays measured air/snow temperatures at heights of 2.5, 5, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 120, 140, and 160 cm above the ground surface using DS1922L iButton loggers, which recorded temperatures every 3 hours. This experiment, referred to as 'HR', has also been discontinued.</p> </div>
Air/Snow temperature vertical profiles at different sites in Livingston Island, Antarctica (2006-2023)
<p>Air or seasonal snow temperature data collected at different heights above the ground (2.5, 5, 10, 20, 40, 80, and 160 cm), generally recorded every 3 hours between 2006 and 2023, using an array of temperature micro-loggers (iButton models by Maxim) mounted along a vertical wooden mast. These measurements were taken at various stations of the PERMATHERMAL network, managed by the University of Alcalá, Madrid, Spain, to monitor the thermal dynamics of frozen soils on Livingston Island, South Shetland Islands, Antarctica.</p>
Ground surface temperature data 2007-2021 at different sites of the PERMATHERMAL monitoring network in Livingston and Deception Islands, SouthShetland Archipelago, Antarctica.
<p>Ground Surface Temperature (GST) corrected data adquired between 2007 and 2021 at different stations of the PERMATHERMAL monitoring network at Livingston and Deception Islands, South Shetland Archipelago, Antarctica.</p> <p>(To be completed)</p>
Phenomenological images (LL-CAM1B) of Limnopolar Lake CALM site, Byers Peninsula, Livingston island, Antarctica (2023).
<p>Images acquired by a phenomenological automatic time-lapse camera (LL-CAM1B) located in Limnopolar Lake permafrost and active layer monitoring site in the Limnopolar Lake basin in Byers Peninsular, Livingston island, Antarctica, in 2023.</p> <ul> <li>File code: LIV_LL_CAM1B_2023_v100</li> <li>Location code: LIV</li> <li>Site code: LL</li> <li>Instrument code: CAM1B</li> <li>Period: 2023</li> <li>Version: 1.0.0 (jpg images as they were obtained from camera, without processing)</li> <li>Camera/manufacturer: CC5MPX by Campbell Scientific Inc.</li> <li>Resolution/Type/Format: 5Mpixels in RGB in jpg files</li> <li>Frequency: 3 images per day at 14h, 15h and 16h GMT</li> <li>Site: Close to Limnopolar Lake CALM site, in Limnopolar Lake basin (Byers Peninsula), Livingston island, Antarctica.</li> <li>Location: </li> <li>Elevation:</li> <li>Initial dataset date/time: February 8, 2023 14:00h GMT</li> <li>Final dataset date/time: February 10, 2024 16:00h GMT</li> <li>Gaps: None</li> <li>Notes: <ul> <li>Folders: 13</li> <li>Files: 1104</li> <li>Other files: none</li> <li>Folder names structure: year_month</li> <li>Datafiles names structure: Site_camera_year_month_day_hour_minute_second.jpg</li> </ul> </li> </ul>
Figure 6. 24 h in Summer diving and haul-out behavior of leopard seals (Hydrurga leptonyx) near mesopredator breeding colonies at Livingston Island, Antarctic Peninsula
Figure 6. 24 h rose plots of leopard seal dive activity by hour of day from the parametric data set. Red arrows represent the mean vector of dive activity. (A) all dives pooled from the 2010 season (n = 6,017) from three seals (4OR, 9OR, and 390G). (B) Activity for leopard seal 4OR (n = 2,292 dives) was significantly different from the 2010 mean and the other two seals; (Watson's two sample tests, P <0.05). (C) Activity for leopard seal 9OR (n = 2,283 dives) was significantly different from the 2010 mean and the other two seals (Watson's two sample tests, P <0.001). (D) Activity for leopard seal 390G (n = 1,442 dives) was significantly different from the 2010 mean and the other two seals (Watson's two sample tests, P <0.001).
Figure 5. 24 h in Summer diving and haul-out behavior of leopard seals (Hydrurga leptonyx) near mesopredator breeding colonies at Livingston Island, Antarctic Peninsula
Figure 5. 24 h rose plots of dive activity by hour of day. The red arrows represents the mean vector (direction = time of day, length = mean number of dives) of dive activity (dives/h) for: (A) all dives (n = 40,308). Gray shaded areas represent the crepuscular periods (+1 h from sunset and sunrise) across the study; (B) all dives pooled from the 2010 season (n = 13,373); (C) all dives pooled from the 2011 season (n = 6,545); (D) all dives pooled from the 2014 season (n = 8,723). The null hypothesis that patterns of diel dive activity were equivalent between seasons could not be rejected (Watson's two-sample tests, P> 0.05).
Figure 1 in Summer diving and haul-out behavior of leopard seals (Hydrurga leptonyx) near mesopredator breeding colonies at Livingston Island, Antarctic Peninsula
Figure 1. Cape Shirreff, Livingston Island, Antarctica. The black star in the right pane indicates the location of Cape Shirreff in the western Antarctic Peninsula region.
Figure 4 in Summer diving and haul-out behavior of leopard seals (Hydrurga leptonyx) near mesopredator breeding colonies at Livingston Island, Antarctic Peninsula
Figure 4. Comparison by dive types between (A) behavior predicted from the k-means cluster analysis of time-depth dive records (n = 38,338) and (B) behavior manually scored from animal-borne video dive data (n = 309).
Figure 3 in Summer diving and haul-out behavior of leopard seals (Hydrurga leptonyx) near mesopredator breeding colonies at Livingston Island, Antarctic Peninsula
Figure 3. The mean proportion (with SD whiskers) of dives that were classified into each dive type (1–4) for all dives in the cluster data set (n = 38,338).
Figure 2 in Summer diving and haul-out behavior of leopard seals (Hydrurga leptonyx) near mesopredator breeding colonies at Livingston Island, Antarctic Peninsula
Figure 2. (A) Empirical haul-out probability distributions for leopard seals at Cape Shirreff based on 209 haul outs from 18 animals in January and February from 2008 to 2014. (B) A polynomial linear regression (solid line) which predicts haul-out probability based on time (h) from local apparent noon; 95% confidence intervals (dashed lines).
Phenomenological images (LL-CAM2) of Limnopolar Lake CALM site, Byers Peninsula, Livingston island, Antarctica (2023).
<p>Images acquired by a phenomenological automatic time-lapse camera (LL-CAM2) located in Limnopolar Lake permafrost and active layer monitoring site in the Limnopolar Lake basin in Byers Peninsular, Livingston island, Antarctica, in 2023.</p> <ul> <li>Location: Livingston Island, Antarctica</li> <li>Site: Limnopolar Lake sounders</li> <li>Instrument/Experiment: Phenomenological time-lapse automatic photographic camera</li> <li>Period: 2023</li> <li>Version: 1.0.0 (jpg images as they were obtained from camera, without processing)</li> <li>Camera/manufacturer: CC5MPX by Campbell Scientific Inc.</li> <li>Resolution/Type/Format: 5Mpixels in RGB in jpg files</li> <li>Frequency: 3 images per day at 14h, 15h and 16h GMT</li> <li>Site: Close to Limnopolar Lake CALM site, in Limnopolar Lake basin (Byers Peninsula), Livingston island, Antarctica.</li> <li>Latitude: -62.6485556 </li> <li>Longitude:-61.1013611</li> <li>Elevation: 77 m</li> <li>Initial dataset date/time: February 8, 2023 14:00h GMT</li> <li>Final dataset date/time: February 10, 2024 16:00h GMT</li> <li>Gaps: None</li> <li>Notes: <ul> <li>File code: LIV_LL_CAM2_2023_v100</li> <li>Location code: LIV</li> <li>Site code: LL</li> <li>Instrument code: CAM2</li> <li>Folders: 13</li> <li>Files: 1103</li> <li>Other files: none</li> <li>Folder names structure: year_month</li> <li>Datafiles names structure: Site_camera_year_month_day_hour_minute_second.jpg</li> </ul> </li> </ul>
Phenomenological images (LL-CAM2) of Limnopolar Lake CALM site, Byers Peninsula, Livingston island, Antarctica (2022).
<p>Images acquired by a phenomenological automatic time-lapse camera (LL-CAM2) located in Limnopolar Lake permafrost and active layer monitoring site in the Limnopolar Lake basin in Byers Peninsular, Livingston island, Antarctica, in 2022.</p> <ul> <li>Location: Livingston Island, Antarctica</li> <li>Site: Limnopolar Lake sounders</li> <li>Instrument/Experiment: Phenomenological time-lapse automatic photographic camera</li> <li>Period: 2022</li> <li>Version: 1.0.0 (jpg images as they were obtained from camera, without processing)</li> <li>Camera/manufacturer: CC5MPX by Campbell Scientific Inc.</li> <li>Resolution/Type/Format: 5Mpixels in RGB in jpg files</li> <li>Frequency: 3 images per day at 14h, 15h and 16h GMT</li> <li>Site: Close to Limnopolar Lake CALM site, in Limnopolar Lake basin (Byers Peninsula), Livingston island, Antarctica.</li> <li>Latitude: -62.6485556 </li> <li>Longitude:-61.1013611</li> <li>Elevation: 77 m</li> <li>Initial dataset date/time: January 25, 2022 14:00h GMT</li> <li>Final dataset date/time: February 7, 2023 16:00h GMT</li> <li>Gaps: None</li> <li>Notes: <ul> <li>File code: LIV_LL_CAM2_2022_v100</li> <li>Location code: LIV</li> <li>Site code: LL</li> <li>Instrument code: CAM2</li> <li>Folders: 14</li> <li>Files: 1132</li> <li>Other files: none</li> <li>Folder names structure: year_month</li> <li>Datafiles names structure: Site_camera_year_month_day_hour_minute_second.jpg</li> </ul> </li> </ul>
Phenomenological images (LL-CAM2) of Limnopolar Lake CALM site, Byers Peninsula, Livingston island, Antarctica (2024).
<p>Images acquired by a phenomenological automatic time-lapse camera (LL-CAM1B) located in Limnopolar Lake permafrost and active layer monitoring site in the Limnopolar Lake basin in Byers Peninsular, Livingston island, Antarctica, in 2022.</p> <ul> <li>File code: LIV_LL_CAM1B_2022_v100</li> <li>Location code: LIV</li> <li>Site code: LL</li> <li>Instrument code: CAM1B</li> <li>Period: 2022</li> <li>Version: 1.0.0 (jpg images as they were obtained from camera, without processing)</li> <li>Camera/manufacturer: CC5MPX by Campbell Scientific Inc.</li> <li>Resolution/Type/Format: 5Mpixels in RGB in jpg files</li> <li>Frequency: 3 images per day at 14h, 15h and 16h GMT</li> <li>Site: Close to Limnopolar Lake CALM site, in Limnopolar Lake basin (Byers Peninsula), Livingston island, Antarctica.</li> <li>Location: </li> <li>Elevation:</li> <li>Initial dataset date/time: January 26, 2022 15:00h GMT</li> <li>Final dataset date/time: February 7, 2023 16:00h GMT</li> <li>Gaps: None</li> <li>Notes: <ul> <li>Folders: 14</li> <li>Files: 1133</li> <li>Other files: none</li> <li>Folder names structure: year_month</li> <li>Datafiles names structure: Site_camera_year_month_day_hour_minute_second.jpg</li> </ul> </li> </ul>
Phenomenological images (LL-CAM2) of Limnopolar Lake CALM site, Byers Peninsula, Livingston island, Antarctica (2020-21).
<p>Images acquired by a phenomenological automatic time-lapse camera (LL-CAM2) located in Limnopolar Lake permafrost and active layer monitoring site in the Limnopolar Lake basin in Byers Peninsular, Livingston island, Antarctica, in 2020 and 2021.</p> <ul> <li>Location: Livingston Island, Antarctica</li> <li>Site: Limnopolar Lake sounders</li> <li>Instrument/Experiment: Phenomenological time-lapse automatic photographic camera</li> <li>Period: 2020 and 2021</li> <li>Version: 1.0.0 (jpg images as they were obtained from camera, without processing)</li> <li>Camera/manufacturer: CC5MPX by Campbell Scientific Inc.</li> <li>Resolution/Type/Format: 5Mpixels in RGB in jpg files</li> <li>Frequency: 3 images per day at 14h, 15h and 16h GMT</li> <li>Site: Close to Limnopolar Lake CALM site, in Limnopolar Lake basin (Byers Peninsula), Livingston island, Antarctica.</li> <li>Latitude: -62.6485556 </li> <li>Longitude:-61.1013611</li> <li>Elevation: 77 m</li> <li>Initial dataset date/time: January 1, 2020 14:00h GMT</li> <li>Final dataset date/time: January 16, 2022 16:00h GMT</li> <li>Gaps: None</li> <li>Notes: <ul> <li>File code: LIV_LL_CAM2_2020-21_v100</li> <li>Location code: LIV</li> <li>Site code: LL</li> <li>Instrument code: CAM2</li> <li>Folders: 25</li> <li>Files: 2260</li> <li>Other files: none</li> <li>Folder names structure: year_month</li> <li>Datafiles names structure: Site_camera_year_month_day_hour_minute_second.jpg</li> </ul> </li> </ul>
Phenomenological images (LL-CAM1B) of Limnopolar Lake CALM site, Byers Peninsula, Livingston island, Antarctica (2020-21).
<p>Images acquired by a phenomenological automatic time-lapse camera (LL-CAM1B) located in Limnopolar Lake permafrost and active layer monitoring site in the Limnopolar Lake basin in Byers Peninsular, Livingston island, Antarctica, in 2020 and 2021.</p> <ul> <li>File code: LIV_LL_CAM1B_2020-21_v100</li> <li>Location code: LIV</li> <li>Site code: LL</li> <li>Instrument code: CAM1B</li> <li>Period: 2020 and 2021</li> <li>Version: 1.0.0 (jpg images as they were obtained from camera, without processing)</li> <li>Camera/manufacturer: CC5MPX by Campbell Scientific Inc.</li> <li>Resolution/Type/Format: 5Mpixels in RGB in jpg files</li> <li>Frequency: 3 images per day at 14h, 15h and 16h GMT</li> <li>Site: Close to Limnopolar Lake CALM site, in Limnopolar Lake basin (Byers Peninsula), Livingston island, Antarctica.</li> <li>Location: </li> <li>Elevation:</li> <li>Initial dataset date/time: January 16, 2020 15:00h GMT</li> <li>Final dataset date/time: January 25, 2022 16:00h GMT</li> <li>Gaps: None</li> <li>Notes: <ul> <li>Folders: 25</li> <li>Files: 2221</li> <li>Other files: none</li> <li>Folder names structure: year_month</li> <li>Datafiles names structure: Site_camera_year_month_day_hour_minute_second.jpg</li> </ul> </li> </ul>
FIGURES 9 –9 in The genus Craspedostauros E.J.Cox (Bacillariophyta) on the coasts of Livingston Island, Maritime Antarctica
FIGURES 9 –9. Reproductions of the original drawings of Tropidoneis laevissima, Stauroneis charcotii and Amphora liouvillei. 91. Tropidoneis laevissima, as presented in West & West (1911: pl. XXVI, figs 115–119). Note that no scale bar was given originally. 92. Stauroneis charcotii and Amphora liouvillei, as presented in Peragallo (1921: pl. II). Fig. 17a, b refers to S. charcotii, and fig. 28 refers to A. liouvillei, as on pl. II in Peragallo (1921). Scale bar = 100 µm (Fig. 92).
FIGURES 57–59 in The genus Craspedostauros E.J.Cox (Bacillariophyta) on the coasts of Livingston Island, Maritime Antarctica
FIGURES 57–59. SEM images of Craspedostauros laevissimus from the type material of Navicula skuae (sample collected by B.Fumanti on 25 December 1989, RO Herbarium Generale, Rome, Italy, for more details see Kochman-Kędziora et al. 2020). 57. External valve view. 58. Internal valve view. 59. Detail of the valve interior, showing the stauros on a wider hyaline area, the central raphe endings with double helictoglossa and the rounded areolar openings internally. Scale bars = 5 µm (Figs 57, 58); 1 µm (Fig. 59).
FIGURES 5 –56 in The genus Craspedostauros E.J.Cox (Bacillariophyta) on the coasts of Livingston Island, Maritime Antarctica
FIGURES 5 –56. SEM images of Craspedostauros confusus sp. nov. from the type population (sample 14). 52. Internal valve view. 53. Close up of the central area internally, showing the narrow stauros on a wider hyaline area, the central raphe endings with double helictoglossa and the rounded to elliptic internal areolar openings. Arrow shows an areola with seven central pores, visible internally. 54. Close up of the apex with the pores of cribrate areolae internally (arrows). 55. Close up of the central area of another valve of the same population, showing once again the narrow stauros, the internal central raphe endings with double helictoglossa and rounded internal areolar openings. 56. Close up of the apex with rounded to elliptic and even somewhat irregular in shape internal areolar openings. Scale bars = 5 μm (Fig. 52); 1 μm (Figs 53–56).
FIGURES 86–90 in The genus Craspedostauros E.J.Cox (Bacillariophyta) on the coasts of Livingston Island, Maritime Antarctica
FIGURES 86–90. SEM images of Craspedostauros confusus sp. nov. and C. laevissimus from several populations from Livingston Island. 86. External valve view of Craspedostauros laevissimus (sample LT10). 87. Close up of the striae of the same valve, showing the occasionally present enlarged areolae near the raphe, without central pores (arrow). Note the density of areolae in comparison to Fig. 88 below. 88–90. Close ups of the central area (Fig. 88) and apices (Figs 88–90) of Craspedostauros confusus sp. nov. (sample MO'), showing the typically enlarged cribrate areolae near the raphe, usually with several central pores. Scale bars = 5 μm (Fig. 86); 1 μm (Figs 87–90).
FIGURES 60–85 in The genus Craspedostauros E.J.Cox (Bacillariophyta) on the coasts of Livingston Island, Maritime Antarctica
FIGURES 60–85. LM images of Craspedostauros confusus sp. nov. and C. laevissimus from several populations from Livingston Island. 60–67. Craspedostauros confusus sp. nov. (sample DNA5). 68–77. Craspedostauros confusus sp. nov. (sample LT6). 78–79. Craspedostauros confusus sp. nov. (sample MO'), Fig. 78 showing a frustule with numerous copulae in girdle view. 80–84. Craspedostauros laevissimus (sample LT10). 85. Craspedostauros laevissimus (sample 13). Scale bar = 10 µm.
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