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Figure 7 in Nannastacidae (Crustacea: Cumacea) from eastern Bass Strait, the south-eastern Australian slope, and Antarctica in the collections of Museum Victoria

Figure 7. Campylaspis edenensis sp. nov. female paratype: a, body, lateral view; b, body, dorsal view; c, antenna 1; d, maxilliped 2; e, maxilliped 3. Scale (in mm): a, b, 0.5; c, d, 0.2; e, 0.25.

Figure 11 in Nannastacidae (Crustacea: Cumacea) from eastern Bass Strait, the south-eastern Australian slope, and Antarctica in the collections of Museum Victoria

Figure 11. Campylaspis grossui sp. nov. female paratype: a, pereopod 1; b, pereopod 2; c, pereopod 3; d, pereopod 4; e, pereopod 5; f, pleonite 6 and left uropod. Scale (in mm): a–e, 0.5; f, 0.25.

Figure 37 in Nannastacidae (Crustacea: Cumacea) from eastern Bass Strait, the south-eastern Australian slope, and Antarctica in the collections of Museum Victoria

Figure 37. Campylaspis tasmaniensis sp. nov. female holotype: a, body, lateral view; b, body, dorsal view; c, antenna 1; d, maxilliped 2; e, maxilliped 3. Scale (in mm): a, b, 1; c, d, 0.2; e, 0.25.

Figure 3 in Nannastacidae (Crustacea: Cumacea) from eastern Bass Strait, the south-eastern Australian slope, and Antarctica in the collections of Museum Victoria

Figure 3. Campylaspis angelae sp. nov. female holotype: a, body, lateral view; b, body, dorsal view; c, antenna 1; d, maxilliped 2; e, maxilliped 3. Scale (in mm): a, b, 0.5; c, d, 0.1; e, 0.2.

Figure 4 in Nannastacidae (Crustacea: Cumacea) from eastern Bass Strait, the south-eastern Australian slope, and Antarctica in the collections of Museum Victoria

Figure 4. Campylaspis angelae sp. nov. female holotype: A, pereopod 1; b, pereopod 2; c, pereopod 3; d, pereopod 4; E, pereopod 5; f, pleonite 6 and left uropod. Scale (in mm): a, 0.2; B–f, 0.25.

Figure 42 in Nannastacidae (Crustacea: Cumacea) from eastern Bass Strait, the south-eastern Australian slope, and Antarctica in the collections of Museum Victoria

Figure 42. Procampylaspis australiensis sp. nov. female paratype: a, body, lateral view; b, carapace, dorsal view; c, antenna 1; d, maxilliped 2; e, maxilliped 3. Scale (in mm): a, 0.25; b, 0.5; c, 0.1; d, 0.2; e, 0.25.

Figure 33 in Nannastacidae (Crustacea: Cumacea) from eastern Bass Strait, the south-eastern Australian slope, and Antarctica in the collections of Museum Victoria

Figure 33. Campylaspis setifera sp. nov. female paratype: a, body, lateral view; b, carapace and pereon, dorsal view; c, antenna 1; d, maxilliped 2; e, maxilliped 3. Scale (in mm): a, b, 1; c, 0.2; d, e, 0.5.

Figure 41 in Nannastacidae (Crustacea: Cumacea) from eastern Bass Strait, the south-eastern Australian slope, and Antarctica in the collections of Museum Victoria

Figure 41. Campylaspis trisulcata sp. nov. female holotype: a, pereopod 1; b, pereopod 2; c, pereopod 3; d, pereopod 4; e, pereopod 5; f, pleonite 6 and left uropod. Scale (in mm): a, b, 0.5; c–f, 0.25.

Figure 36 in Nannastacidae (Crustacea: Cumacea) from eastern Bass Strait, the south-eastern Australian slope, and Antarctica in the collections of Museum Victoria

Figure 36. Campylaspis spinifera sp. nov. female paratype: a, pereopod 1; b, pereopod 2; c, pereopod 3; d, pereopod 4; e, pereopod 5; f, pleonite 6 and left uropod. Scale (in mm): a–f, 0.25.

Figure 40 in Nannastacidae (Crustacea: Cumacea) from eastern Bass Strait, the south-eastern Australian slope, and Antarctica in the collections of Museum Victoria

Figure 40. Campylaspis trisulcata sp. nov. female holotype: a, body, lateral view; b, carapace, dorsal view; c, antenna 1; d, maxilliped 2; e, maxilliped 3. Scale (in mm): a, b, 1; c, 0.25; d, 0.3; e, 0.25.

Figure 14 in Nannastacidae (Crustacea: Cumacea) from eastern Bass Strait, the south-eastern Australian slope, and Antarctica in the collections of Museum Victoria

Figure 14. Campylaspis hirsuta sp. nov. female holotype: a, body, lateral view; b, carapace, dorsal view; c, antenna 1; d, maxilliped 2 Scale (in mm): a, b, 0.5; c, 0.25; d, 0.3.

Figure 1 in Nannastacidae (Crustacea: Cumacea) from eastern Bass Strait, the south-eastern Australian slope, and Antarctica in the collections of Museum Victoria

Figure 1. Campylaspis anae sp. nov. female holotype: a, body, lateral view; b, body, dorsal view; c, antenna 1; d, maxilliped 2; e, maxilliped 3. Scale (in mm): a, b, 1; c, e, 0.25; d, 01.

opencc-by-4.0Mar 2024View details →

Model output for "Geometric amplification and suppression of ice-shelf basal melt in West Antarctica"

<h2><strong>Content description<br></strong></h2> <p>This data repository contains Úa-MITgcm model output in support of the manuscript 'Geometric amplification and suppression of ice-shelf basal melt in West Antarctica' (De Rydt and Naughten, 2024).</p> <p>In the paper, results from 4 experiments with the coupled ice-ocean model Úa-MITgcm are presented. The experiments are <em>ref_melt</em>, <em>hi_melt</em>, <em>av_melt</em> and <em>var_melt</em> (see Table 1 in De Rydt and Naughten, 2024). Original MITgcm and Úa output files at the start, middle and end of each experiment are available in the .zip-files with corresponding experiment name. Data for other timestamps are available upon request from the authors.</p> <p>The structure of each file is as follows:</p> <table> <tbody> <tr> <td>exp_name.zip/</td> <td>yyyymm/</td> <td>  MITgcm/</td> <td> bathymetry.shice</td> </tr> <tr> <td> </td> <td> </td> <td> </td> <td>data.diagnostics</td> </tr> <tr> <td> </td> <td> </td> <td> </td> <td>output.nc</td> </tr> <tr> <td> </td> <td> </td> <td> </td> <td>pload.mdjwf</td> </tr> <tr> <td> </td> <td> </td> <td> </td> <td>shelfice_topo.bin</td> </tr> <tr> <td> </td> <td> </td> <td>Ua/</td> <td>DataForMIT.mat</td> </tr> <tr> <td> </td> <td> </td> <td> </td> <td>NewMeltrate.mat</td> </tr> <tr> <td> </td> <td> </td> <td> </td> <td>UaDefaultRun_yyyymm_dd.mat</td> </tr> </tbody> </table> <p><br><code>yyyymm</code> refers to the start month of the coupling timestep. Note that while the initial state of the ice sheet has been optimized to represent its present-day  configuration, the future evolution of the ocean and ice sheet is driven by idealized forcings. The results should not be treated as projections, and the timestamps correspond to model time (in years), not real time.</p> <p><strong>MITgcm diagnostics</strong> (temperature, salinity, velocities and ice-shelf freshwater flux) are stored in <code>output.nc</code> and provided as an average value over the 1-month coupling time interval. The <code>bathymetry.shice</code>, <code>data</code>, <code>data.diagnostics</code>, <code>pload.mdjwf </code>and <code>shelfice_topo.bin</code> files are MITgcm input files for ocean bathymetry, general model parameters, diagnostic model parameters, intial pressure loading under the ice shelf and ice-shelf draft for the corresponding coupling timestep, respectively.</p> <p><strong>Úa data</strong> is provided in <code>UaDefaultRun_yyyymm_dd.mat</code> as a snapshot at the end of the coupling interval (<code>yyyymm_dd</code>). The other files, <code>DataForMIT.mat </code>and <code>NewMeltrate.mat</code> are ice-shelf geometry and MITgcm melt rates at the start of the coupling interval, respectively.</p> <h2><strong>Other resources</strong></h2> <p>The Úa-MITgcm source code and custom Úa-MITgcm configuration files for the experiments are available <a href="https://github.com/knaughten/UaMITgcm/tree/archer2">here</a> and <a href="https://github.com/knaughten/UaMITgcm/tree/archer2/example/ASE_999">here.</a> Scripts to analyse and plot the data are available <a href="https://github.com/janderydt/uamitgcm_ASE">here</a>.</p> <h2><strong>References</strong></h2> <p>De Rydt, J. and Naughten, K.: Geometric amplification and suppression of ice-shelf basal melt in West Antarctica, The Cryosphere, 18, 1863–1888, https://doi.org/10.5194/tc-18-1863-2024, 2024.</p>

Figure 7 in Before the freeze: otoliths from the Eocene of Seymour Island, Antarctica, reveal dominance of gadiform fishes (Teleostei)

Figure 7. Fossil otolith record in Antarctica, Australia, New Zealand and the North Sea Basin and distribution and estimated abundance of gadiform otoliths (number of species, recognized or inferred, not shown). Ranicipitidae shown in family ranking following Nelson (1994); other families following Nelson (2006). Data compiled and altered from Nolf (2013), Schwarzhans (1980, 1985, 1994, 2003) and Stinton (1965, 1966).

Figure 6. Eocene otoliths from Seymour Island. A in Before the freeze: otoliths from the Eocene of Seymour Island, Antarctica, reveal dominance of gadiform fishes (Teleostei)

Figure 6. Eocene otoliths from Seymour Island. A, Argentina antarctica sp. nov., holotype, NRM-PZ P.15964, mirror imaged, inner face. B, C, Diaphus? marambionis sp. nov., holotype, NRM-PZ P.15966; B, inner face; C, ventral view. D—F, Macruronus eastmani sp. nov., holotype, NRM-PZ P.15970, mirror imaged; D, inner face; E, ventral view; F, outer face. G—I, Palimphemus seymourensis sp. nov., holotype, NRM-PZ P.15973, mirror imaged; G, inner face; H, ventral view; I, outer face. J—L, Coelorinchus nordenskjoeldi sp. nov., holotype, NRM-PZ P.15978; J, inner face; K, ventral view; L, outer face. M, N, Coelorinchus balushkini sp. nov., holotype, NRM-PZ P.15976; M, inner face; N, ventral view. O, P, Hoplobrotula? antipoda sp. nov., holotype, NRM-PZ P.15984, mirror imaged; O, inner face; P, ventral view. Q, Notoberyx cionei gen. nov., sp. nov.; holotype, NRM-PZ P.15987, inner face. R, Cepola anderssoni sp. nov., holotype, NRM-PZ P.15996, mirror imaged, inner face.

Figure 5 in Before the freeze: otoliths from the Eocene of Seymour Island, Antarctica, reveal dominance of gadiform fishes (Teleostei)

Figure 5. Drawings of Eocene otoliths from Seymour Island. A—C, Hoplobrotula? antipoda sp. nov.; A, B, holotype, NRM-PZ P.15984, mirror imaged; A, inner face; B, ventral view; C, paratype, NRM-PZ P.15985, inner face. D—G, Notoberyx cionei gen. nov., sp. nov.; D—F, holotype, NRM-PZ P.15987; D, anterior view; E, inner face; F, ventral view; G, paratype, NRM-PZ P.15988, inner face. H, Centroberyx sp., NRM-PZ P.15986, mirror imaged, inner face. I, J, Acanthopterygii indet., NRM-PZ P.15990, mirror imaged; I, inner face, J, ventral view. K, L, Percoidei indet., NRM-PZ P.15992, mirror imaged; K, inner face; L, ventral view. M, N, Haemulidae? indet., NRM-PZ P.15993, mirror imaged; M, inner face; N, ventral view. O, P, Sparidae? indet., NRM-PZ P.15994, mirror imaged; O, inner face; P, ventral view. Q, R, Cepola anderssoni sp. nov., holotype, NRM-PZ P.15996, mirror imaged; Q, inner face; R, ventral view.

Figure 4 in Before the freeze: otoliths from the Eocene of Seymour Island, Antarctica, reveal dominance of gadiform fishes (Teleostei)

Figure 4. Drawings of Eocene otoliths from Seymour Island. A, B, Tripterophycis immutatus Schwarzhans, 1980, NRM-PZ P.15969, mirror imaged; A, inner face; B, dorsal view. C—F, Macruronus eastmani sp. nov.; C—E, holotype, NRM-PZ P.15970, mirror imaged; C, inner face; D, outer face; E, ventral view; F, paratype, NRM-PZ P.15971, inner face. G—M, Palimphemus seymourensis sp. nov.; G—I, holotype, NRM-PZ P.15973, mirror imaged; G, inner face; H, ventral view; I, outer face; J, paratype, NRM-PZ P.15975, mirror imaged, inner face; K—M, paratypes, NRM-PZ P.15974; K, inner face, mirror imaged; L, ventral view; M, inner face. N—R, Coelorinchus nordenskjoeldi sp. nov.; N—P, holotype, NRM-PZ P.15978; N, inner face; O, ventral view; P, outer face; Q, R, paratype, NRM-PZ P.15979, mirror imaged; Q, inner face; R, ventral view. S—U, Coelorinchus balushkini sp. nov., holotype, NRM-PZ P.15976; S, inner face; T, ventral view; U, outer face. V, W, Coelorinchus sp., NRM-PZ P.15911; V, inner face (strongly eroded); W, ventral view.

Figure 3 in Before the freeze: otoliths from the Eocene of Seymour Island, Antarctica, reveal dominance of gadiform fishes (Teleostei)

Figure 3. Drawings of Eocene otoliths from Seymour Island. A—C, Argentina antarctica sp. nov., holotype, NRM-PZ P.15964, mirror imaged; A, outer face; B, ventral view; C, inner face. D—I, Diaphus? marambionis sp. nov.; D—F, holotype, NRM-PZ P.15966; D, anterior view, E, inner face, F, ventral view; G—I, (mirror imaged) paratypes, NRM-PZ P.15967; G, inner face; H, ventral view; I, inner face. J, K, Paraulopus sp., NRM-PZ P.15965, mirror imaged; J, inner face; K, ventral view.

Figure 2. Location photographs. A in Before the freeze: otoliths from the Eocene of Seymour Island, Antarctica, reveal dominance of gadiform fishes (Teleostei)

Figure 2. Location photographs. A, aerial view of IAA 1/90, 'Ungulate site', 64Ǫ14,04.67ĮĮS,56Ǫ 39,56.38ĮĮ W, marked by asterisk; B, panoramic view of site IAA 1/90 with 'Natica horizon' marked by asterisks; C, Argentine-Swedish field party collecting fossils at IAA 2/95, 'Marsupial site', 64Ǫ13,58ĮĮS,56Ǫ39,06ĮĮ W); D, panoramic view of site IAA 2/95 with Cockburn Island in background; E, 'Natica horizon' near site IAA 2/95 showing lens-like character of the beds. Photographs by F. Degrange (A, D), T. Mors (B) and J. Hagstrom (C, E).

Figure 1. Location and stratigraphy. A in Before the freeze: otoliths from the Eocene of Seymour Island, Antarctica, reveal dominance of gadiform fishes (Teleostei)

Figure 1. Location and stratigraphy. A, map of Antarctica showing the position of the Antarctic Peninsula; B, map of the Antarctic Peninsula showing Seymour Island; C, geological map of Seymour Island showing the outcrop of Telm 4-5 and localities IAA 1/90 and 2/ 95; D, composite measured section through the La Meseta Formation showing the stratigraphical position of the sampled 'Natica horizon' (IAA 1/90 and 2/95). Modified from Reguero et al. (2013). Strontium date values from Dutton et al. (2002), Ivany et al. (2008), Dingle & Lavelle (1998) and Reguero et al. (2002).