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11 results for “high southern latitude”
Investigation of the southern hemisphere mid-high latitude thermospheric ∑O/N2 responses to the Space-X storm
<p>This data sets are the data used to plot the figures in the above mentioned paper (Figure 3 to 6)</p> <p>All files are in dimension 288*144*6, 288 stands for longitudes number from -180 to 180 with a resolution of 1.25</p> <p>144 stands for latitude numbers fro -88.75 to 88.75 with a resolution of 1.25. 6 stands for the time, 0:20, 2:20, 4:20, 7:20, 10:20 and 13:20 UT on DOY 34.</p> <p>dON2 stand for the percentage diff of column density ratio of O to N2 between DOY 34 and 32</p> <p>UN stands for zonal wind, VN stands for meridional wind, TN stands for neutral temperature</p> <p>QJO stands for Joule heating rate per unit mass near 160 km</p> <p>POTEN stands for ionosphere potential</p>
MITgcm simulations of sea level response to freshwater injected at the surface and at depth in southern high latitudes: Model output and analysis code
<p>Model output (netcdf) and python code (included in both py and ipynb formats) to create the figures in Eisenman et al. (2024).</p> <div> <p>See https://eisenman-group.github.io for further details.</p> </div>
First record of oceanic anoxic event 1d at southern high latitudes: Sedimentary and geochemical evidence from International Ocean Discovery Program Expedition 369
<p>Oceanic anoxic event 1d (OAE 1d) has been well studied at northern low latitudes (i.e., in Tethys and the North Atlantic); however, the paleoenvironmental response associated with this event at high latitudes has not been documented and the trigger mechanism remains unknown. Here, we address both of these shortcomings by presenting the first detailed sedimentary and geochemical multi-proxy records of the OAE 1d at southern high latitudes (60-62°S), obtained from sediments at Site U1513, IODP Expedition 369. In particular, the record of sedimentary mercury proxy reveals that OAE 1d is associated with the Central Kerguelen large igneous province volcanism. Furthermore, the significant increase in continental runoff and consequent terrigenous input for southwestern Australia in the southeastern proto-India Ocean might have resulted regionally in weakened bottom-water oxygenation and strengthened organic matter burial during OAE 1d. Oceanic anoxic event 1d (OAE 1d) has been well studied at northern low latitudes (i.e., in Tethys and the North Atlantic); however, the paleoenvironmental response associated with this event at high latitudes has not been documented and the trigger mechanism remains unknown. Here, we address both of these shortcomings by presenting the first detailed sedimentary and geochemical multi-proxy records of the OAE 1d at southern high latitudes (60-62°S), obtained from sediments at Site U1513, IODP Expedition 369. In particular, the record of sedimentary mercury proxy reveals that OAE 1d is associated with the Central Kerguelen large igneous province volcanism. Furthermore, the significant increase in continental runoff and consequent terrigenous input for southwestern Australia in the southeastern proto-India Ocean might have resulted regionally in weakened bottom-water oxygenation and strengthened organic matter burial during OAE 1d.</p>
FIGURE 3 in Southern high latitude squat lobsters II: description of Uroptychus macquariae sp. nov. from Macquarie Ridge
FIGURE 3. Pairwise dissimilarity values for nine sequences of chirostyloid squat lobsters (top panel) and neighbor-joining tree including bootstrap support values (%) at each node (bottom panel).
FIGURE 2 in Southern high latitude squat lobsters II: description of Uroptychus macquariae sp. nov. from Macquarie Ridge
FIGURE 2. Seamount habitat on Macquarie Ridge seamounts. Top panel: Seamount 8 (station TAN0803/92). Bottom panel: Hjort Seamount (station TAN0803/99). Credit: Deep-Towed Imaging System (DTIS)/ NIWA MacRidge 2 voyage.
FIGURE 5 in Southern high latitude squat lobsters II: description of Uroptychus macquariae sp. nov. from Macquarie Ridge
FIGURE 5. Top row: Uroptychus macquariae n.sp., carapace, Hjort Seamount, Macquarie Ridge (NIWA 40904). A, female pcl 5.5 mm. B, male pcl 7.4 mm. C, male pcl 11.8 mm. Bottom row: Uroptychus insignis (Henderson, 1885). D. female pcl 4.4 mm, Kerguelen Islands (MNHN IU-2010-5432), E. paralectotype, male pcl 4.5 mm, Prince Edward Islands (BMNH 1902.10.2.9–14), F. female pcl 7.2 mm, Kerguelen Islands (AM P97999), G. paralectotype, male pcl 10.7 mm, Prince Edward Islands (BMNH 1902.10.2.9–14), H. lectotype, ov. female, pcl 10.6 mm, Prince Edward Islands (BMNH 1902.10.2.9–14). Scale = 5 mm. (Modified after Ahyong et al. 2015).
FIGURE 6 in Southern high latitude squat lobsters II: description of Uroptychus macquariae sp. nov. from Macquarie Ridge
FIGURE 6. Colour in life. A, Uroptychus macquariae n.sp., male pcl 11.8 mm, Hjort Seamount, Macquarie Ridge, TAN0803/ 98 (NIWA 40904); B, male pcl 13.1 mm, Seamount 8, Macquarie Ridge, TAN0803/88 (NIWA 40664, lost at sea). Scale = 10 mm.
FIGURE 1 in Southern high latitude squat lobsters II: description of Uroptychus macquariae sp. nov. from Macquarie Ridge
FIGURE 1. Distribution records of Uroptychus insignis (circles) and U. macquariae n.sp. (crosses) from Macquarie Ridge (1), Prince Edward Islands (2), Crozet Islands (3), Kerguelen Islands (4) and Amsterdam Island (5). The map is based upon bathymetry data from the GEBCO_2008 Grid, version 20100927, www.gebco.net.
FIGURE 4. Uroptychus macquariae n in Southern high latitude squat lobsters II: description of Uroptychus macquariae sp. nov. from Macquarie Ridge
FIGURE 4. Uroptychus macquariae n. sp., Holotype, female ov., pcl 10.5 mm, Hjort Seamount, Macquarie Ridge (AM P100957, ex. NIWA 40904). A, dorsal habitus. B, carapace, right lateral. C, right antenna, ventral view. D, right maxilliped 3, lateral. E, right crista dentata. F, right P1 ischiomerus, ventral. G, sternal plastron. H, telson. Scale: A, B, F = 2.5 mm; C, D, G, H = 1.25 mm; E = 0.5 mm. (Modified after Ahyong et al. 2015)
Southern High Latitude Temperature Proxies from the Late Eocene and Early Oligocene
<p>Dataset of proxy records utilized in Comparison of Southern High Latitude Temperature Proxies to Model Outputs from the Eocene-Oligocene Transition by Tibbett et al., 2022</p>
MITgcm simulations of sea level response to freshwater injected at the surface and at depth in southern high latitudes: Model output and analysis code
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