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1,337 results for “antarctica”
FIGURE 1 in Haslea crucigeroides var. australis, var. nov. (Bacillariophyta), a new marine diatom from southern South America and Antarctica
FIGURE 1. Maps showing the study area and the three sampling stations (BD, BE, BF) in Almirante Brown Bay, Beagle Channel, Tierra del Fuego, Argentina.
FIGURES 2–4 in Haslea crucigeroides var. australis, var. nov. (Bacillariophyta), a new marine diatom from southern South America and Antarctica
FIGURES 2–4. LM images of Haslea crucigeroides var. australis, var. nov. 2, 3. Whole cells in valve and girdle view showing the two chloroplasts. 4. Clean frustule in girdle view showing the dome-shaped valves and copulae. Scale bars = 20 μm.
Monthly RACMO2.4p1 data for Greenland (11 km) and Antarctica (27 km) for SMB, SEB, near-surface temperature and wind speed (2006-2015)
<p>Version 2: Updated missing months in the Antarctic data set.</p> <p>Monthly-accumulated (named monthlyS) and monthly-averaged (named monthlyA) data for RACMO2.4p1 for Greenland (GRN) and Antarctica (ANT) on a 11 km and 27 km horizontal resolution grid, respectively, are presented in this data set and are available for 2006 until 2015. The data include the surface mass balance (SMB), snow melt (mltgl), refreezing (rfrzgl), precipitation (pr), runoff (totrunoff), drifting snow erosion (sndiv), sublimation (sublgl) and sublimation due to blowing snow (sublsd), all in kg m-2 mo-1. For the surface energy balance (SEB): the downward shortwave radiation (rsds), shortwave upward radiation (rsus), downward longwave radiation (rlds), upward longwave radiation (rlus), sensible heat flux (hfss) and latent heat flux (hfls) are available. The SEB components are in J m-2. To convert to W m-2, divide by the amount of seconds in a month. In addition, the near-surface temperature (tas), in K, and near-surface wind speed (sfcwind), in m s-1, are included.</p> <p><br>This data set does not represent new surface mass balance and climate products for Greenland and Antarctica. This will follow in later publications, where RACMO2.4 simulations are presented covering the full historical time period of ERA5 with higher horizontal resolution. </p>
LoRa on Ice: dataset to evaluate the LoRa radio technology for sea ice research in Antarctica
<p>We present the design and implementation of a wireless sensor network (WSN) tailored for sea ice research. Our custom-built data acquisition unit employs Long Range (LoRa) radio technology and the Long Range Wide Area Network (LoRaWAN) protocol. We describe the deployment of a scientific measurement system in the vicinity of the Neumayer III research station in Antarctica, utilizing IoT technologies.<br>This dataset contains different measurements to evaluate the performance of the LoRa radio link and the LoRaWAN protocol. In this work we use a data acquisition unit sending data via LoRa using the LoRaWAN protocol. The data acquisition unit is a custom made electronics designed to sample data from connected sensors used for sea ice research in Antarctica. Three datasets are available to evaluate the performance of the LoRa radio technology and the LoRaWAN protocol: one range test on a motor boat in Germany and two range tests performed in Antarctica near the Neumayer III station. </p>
Graph neural network emulator for modeling of ice dynamics and calving in the Pine Island Glacier, Antarctica
<p>These files include the following codes and datasets for developing graph neural network (GNN) emulators for the Ice-sheet and Sea-level System Model (ISSM) for modeling ice sheet dynamics and calving in the Pine Island Glacier, Antarctica</p> <ul> <li>ISSM_DGL_PIG2.py: Python file for training GNN models (*single.py: code for single GPU environment)</li> <li>ISSM_CNN_PIG.py: Python file for training convolutional neural network (CNN) models</li> <li>*.mat: Datasets of the ISSM transient simulation results (graphs for GNNs)</li> <li>*.pkl: Datasets of the ISSM transient simulation results (grids for CNNs)</li> </ul>
Data from: Mollusks from the upper Shackleton Limestone (Cambrian Series 2), Central Transantarctic Mountains, East Antarctica
An assemblage of Cambrian Series 2, Stages 3–4 conchiferan mollusks from the Shackleton Limestone, Transantarctic Mountains, East Antarctica is formally described and illustrated. The fauna includes one bivalve, one macromollusk and ten micromollusks, including the first description of the species Xinjispira simplex outside North China. The new fauna shows some similarity to previously described micromollusks from lower Cambrian glacial erratics from the Antarctic Peninsula. The fauna, mainly composed of steinkerns, is relatively low diversity, but the presence of diagnostic taxa, including helcionelloid Mackinnonia rostrata, bivalve Pojetaia runnegari, cambroclavid Cambroclavus absonus and bradoriid Spinospitella coronata as well as the botsfordiid brachiopod Schizopholis yorkensis in the overlying Holyoake Formation correlates the succession to the Dailyatia odyssei Zone (Cambrian Stage 3–4) in South Australia.
FIGURE 3. Paraleptognathia antarctica ZMH K40570 a. Body dorsal view, b. Body, lateral view. Scale bar 1 in A revision of the genus Paraleptognathia Kudinova-Pasternak, 1981 (Crustacea: Tanaidacea) and description of four new species
FIGURE 3. Paraleptognathia antarctica ZMH K40570 a. Body dorsal view, b. Body, lateral view. Scale bar 1mm. c. Antennule, d. Antennule juvenile male, e. Antenna, f. Cheliped, g. Uropod, h. Pleopod, i. Pereopod 1, j. Pereopod 2, k. Pereopod 3, l. Pereopod 4, m. Pereopod 5, n. Pereopod 6. Scale bar 0.25 mm.
FIGURE 4. Paraleptognathia antarctica ZMH K40570 a. Maxillula, b. Epignath, c. Mandibles, d. Labrum, e. Labium, f. Maxilla, g. Maxilliped. Scale bar 0.1 in A revision of the genus Paraleptognathia Kudinova-Pasternak, 1981 (Crustacea: Tanaidacea) and description of four new species
FIGURE 4. Paraleptognathia antarctica ZMH K40570 a. Maxillula, b. Epignath, c. Mandibles, d. Labrum, e. Labium, f. Maxilla, g. Maxilliped. Scale bar 0.1 mm.
Temperate Oligocene surface ocean conditions offshore of Cape Adare, Ross Sea, Antarctica
<p>Datasets accompanying Temperate Oligocene surface ocean conditions offshore of Cape Adare, Ross Sea, Antarctica by Hoem et al., 2021. Climate of the past. </p> <p>Supplementary table S1: Demagnetization data results of DSDP Site 274, cores 21-43 </p> <p>Supplementary table S2: Concentrations of GDGTs at DSDP Site 274, cores 21-43. </p> <p>Supplementary table S3: Total palynomorph assemblage data, total counts, DSDP Site 274, cores 21-43</p> <p>Supplementary table S4: Correspondence analysis (CA) scores of palynological data DSDP Site 274, cores 21-43. </p>
FIGURES 50–64 in Four new Luticola taxa (Bacillariophyta) from Maritime Antarctica
FIGURES 50–64. Luticola olegsakharovii Zidarova, Levkov & Van de Vijver, sp. nov. Light (LM) and scanning electron microscope (SEM) micrographs: Figs 50, 51–62. LM of 13 valves from the type population, King George Island, sample KGI81 (scale bars = 10 µm). Fig. 63. SEM external view of a valve from the type population, King George Island, sample KGI81 (scale bar = 5 µm). Fig. 64. SEM internal view of a valve from the type population, King George Island, sample KGI81 (scale bar = 5 µm).
FIGURES 35–49 in Four new Luticola taxa (Bacillariophyta) from Maritime Antarctica
FIGURES 35–49. Luticola contii Zidarova, Levkov & Van de Vijver, sp. nov. Light (LM) and scanning electron microscope (SEM) micrographs: Figs 35, 36–48. LM of 14 valves from the type population, Deception Island, sample D37 (scale bars = 10 µm). Fig. 49. SEM external view of a valve from the type population, Deception Island, sample D37 (scale bar = 5 µm).
FIGURES 21–34 in Four new Luticola taxa (Bacillariophyta) from Maritime Antarctica
FIGURES 21–34. Luticola bogaertsiana Zidarova, Levkov & Van de Vijver, sp. nov. Light (LM) and scanning electron microscope (SEM) micrographs: Figs 21, 22–28. LM of 8 valves from the type population, King George Island, sample KGI12 (scale bars = 10 µm). Figs 29–32. LM of 4 valves from a Deception Island population, sample D37 (scale bars = 10 µm). Fig. 33. SEM external view of a valve from the type population, King George Island, sample KGI12 (scale bar = 5 µm). Fig. 34. SEM internal view of a valve from a Deception Island population, sample D37 (scale bar = 5 µm).
FIGURES 2–20 in Four new Luticola taxa (Bacillariophyta) from Maritime Antarctica
FIGURES 2–20. Luticola neglecta Zidarova, Levkov & Van de Vijver, sp. nov. Light (LM) and scanning electron microscope (SEM) micrographs: Figs 2, 3–19. LM of 18 valves from the type population, Deception Island, sample D37 (scale bars = 10 µm). Fig. 20. SEM external view of a valve from the type population, Deception Island, sample D37 (scale bar = 5 µm).
FIGURE 1 in Four new Luticola taxa (Bacillariophyta) from Maritime Antarctica
FIGURE 1. Map of the region showing A. the location of the South Shetland Islands and B. the position of Deception Island, King George Island and Livingston Island within the South Shetland Islands.
FIGURE 1 in Analysis of the type material of Navicula brachysira Brébisson with the description of Brachysira sandrae, a new raphid diatom (Bacillariophyceae) from Iles Kerguelen (TAAF, sub-Antarctica, southern Indian Ocean)
FIGURE 1. Geographical position of Iles Kerguelen in the southern hemisphere and the position of the study area on Grand Terre, the main island of Iles Kerguelen (indicated by *)
FIGURES 48–52 in Analysis of the type material of Navicula brachysira Brébisson with the description of Brachysira sandrae, a new raphid diatom (Bacillariophyceae) from Iles Kerguelen (TAAF, sub-Antarctica, southern Indian Ocean)
FIGURES 48–52. Navicula brachysira. All pictures taken from the type population (Falaise). Fig. 48. External view of an entire valve showing the most typical features such as the marginal ridge, the striae always composed of (2)3 areolae, the simple raphe endings and the mantle striae. Fig. 49. Detail view of the central area. Not the presence of the papillae, the regular length of the areolae and the simple proximal raphe endings. Fig. 50. External detail of a valve apex with the typical axial ridge terminating before the marginal ridge, the simple, almost straight distal raphe endings, the T-shaped raphe groove near the apex and the diminishing number of areolae per stria. Fig. 51. Internal view of an entire valve. Fig. 52. Internal detail of the central area with the typical weakly bent proximal raphe endings and the porous hymenate internal coverings of the striae. Scale bar represents 10 µm, except for Figs 49, 50 & 52 where scale bar = 5 µm.
FIGURES 2–41 in Analysis of the type material of Navicula brachysira Brébisson with the description of Brachysira sandrae, a new raphid diatom (Bacillariophyceae) from Iles Kerguelen (TAAF, sub-Antarctica, southern Indian Ocean)
FIGURES 2–41. LM. Brachysira sandrae (2–26) and Navicula brachysira (27–41). Figs 2–26. Brachysira sandrae, pictures taken from the holotype population (sample B13) from the Val Travers area. Figs 27–41. Navicula brachysira, pictures taken from the type population found in material collected by A. de Brébisson in Falaise and deposited in the Botanic Garden Meise. Scale bar represents 10 µm.
Figure 12 in A further study on littoral ciliates (Protozoa, Ciliophora) near King George Island, Antarctica, with description of a new genus and seven new species
Figure 12. Hemigastrostyla szaboi (A–F), Holosticha diademata (G, H, J) and Metaurostylopsis marina (I, K, L) after protargol impregnation. (A) Ventral view, to show the general morphology, arrows mark the macronuclei. (B, C) Detail of anterior portion, to show the frontal and anterior three ventral cirri located in the frontal area (arrows). (D–F) Ventral view of caudal portion, arrowheads in D mark the transverse cirri, while those in E indicate the two fine pre-transverse cirri; arrows in D, E mark the extra cirrus. (G, H) Ventral view of the same specimen, to show the transverse cirri (arrow in G) and the macronuclei (arrows in H). (I) Ventral view of anterior portion, to show the frontoterminal cirri (arrow) and the buccal cirrus (arrowhead). (J) Ventral view of a slender form, arrow marks the transversely arranged anterior end of left marginal row, arrowheads mark the two macronuclei. (K) Ventral view of caudal portion, arrow marks the transverse cirri. (L) Ventral view of anterior portion, to show the short ventral row posterior to the midventral rows (arrow). Scale bars: 50 Mm (A); 30 Mm (G, J); 20 Mm (I).
Figure 13 in A further study on littoral ciliates (Protozoa, Ciliophora) near King George Island, Antarctica, with description of a new genus and seven new species
Figure 13. Euplotes balteatus (A–D), Euplotes petzi nov. spec. (E–H) and Euplotes rariseta (I– N) after protargol impregnation. (A–C) Ventral view of three specimens, to show the general appearance of infraciliature, arrow in A marks the strong and loosely arranged transverse cirri, arrowheads in C indicate the two marginal cirri. (D) Dorsal view, note that the basal bodies are loosely arranged. (E, G, H) Ventral view, note the two small and closely- spaced marginal cirri (arrow and arrowheads). (F) Dorsal view. (I, K) Ventral view, arrows mark the single marginal cirrus, arrowheads in K indicate the weak and close-set transverse cirri. (L) Ventral view, arrowhead marks the two anteriormost frontoventral cirri. (M) Ventral view, to show the adoral zone and the marginal cirrus (arrowhead). (N) Ventral view, arrow indicates the paroral membrane. Scale bars: 20 Mm (A, I); 35 Mm (E).
Figure 10 in A further study on littoral ciliates (Protozoa, Ciliophora) near King George Island, Antarctica, with description of a new genus and seven new species
Figure 10. Condylostoma spatiosum (A, B), Diophrys scutum (D), Diophrys aff. oligothrix (C, G), Diophrys appendiculata (E), Euplotes vannus (F) and Euplotes dragescoi nov. spec. (H–K) after protargol impregnation. (A) Dorsal view, to show the general appearance, arrow marks the beaded macronucleus. (B) Caudal portion, arrowhead marks the suture. (C) Dorsal view, to show the dorsal kineties (arrows). (D) Ventral view, to show the general infraciliature. (E) Ventral view, arrow marks the pre-transverse cirrus, double-arrowheads indicate the transverse cirri, while arrowhead points to the anterior marginal cirrus. (F) Dorsal view, arrowheads mark the three caudal cirri, arrow indicates the macronucleus. (G) Ventral view, arrow marks the pre-transverse cirrus. (H) Detail of a divider, arrowheads mark the newlyformed two marginal cirri (note the different sizes). (I) Dorsal view, to show the ridges. (J) Ventral view, arrow marks the anterior (large) marginal cirrus, double-arrowheads indicate the paroral membrane. (K) Detail of ventral view, arrow and arrowhead indicate the small and large marginal cirrus, respectively. Scale bars: 200 Mm (A); 100 Mm (D); 50 Mm (E–G, J).
ScienceDex guides
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.