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10 results for “Sea Voyage”
Southern Ocean Cloud and Aerosol data set: a compilation of measurements from the 2018 Southern Ocean Ross Sea Marine Ecosystems and Environment voyage
<p>Due to its remote location and extreme weather conditions, atmospheric in situ measurements are rare in the Southern Ocean. As a result, aerosol-cloud interactions in this region are poorly understood and remain a major source of uncertainty in climate models. This, in turn, contributes substantially to persistent biases in climate model simulations, numerical weather prediction models and reanalyses. It has been shown in previous studies that in situ and ground-based remote sensing measurements across the Southern Ocean are critical for complementing satellite data sets due to the importance of boundary layer and low-level cloud processes. These processes are poorly sampled by satellite-based measurements which are typically obscured by near-continuous overlying cloud cover observed in this region. Here we provide a comprehensive set of ship-based aerosol and meteorological observations collected on the TAN1802 voyage of R/V Tangaroa across the Southern Ocean, from Wellington, New Zealand, to the Ross Sea, Antarctica. The voyage was carried out from 8 February to 21 March, 2018. The compiled data set provides here includes measurements from a range of instruments, such as (i) meteorological conditions at the sea surface and profile measurements; (ii) the size and concentration of particles; (iii) trace gases dissolved in the ocean surface such as dimethyl sulfide and carbonyl sulfide; (iv) and remotely sensed observations of low clouds. We encourage the scientific community to use these measurements for further analysis and model evaluation studies, in particular, for studies of Southern Ocean clouds, aerosol and their interaction.</p>
Figure 2. RRS William Scoresby served the Discovery Expedition for eight voyages from 1926 in The Discovery Expedition sea cucumbers (Echinodermata: Holothuroidea)
Figure 2. RRS William Scoresby served the Discovery Expedition for eight voyages from 1926 to 1951.
Data from: Maiden voyage into death: are fisheries affecting seabird juvenile survival during the first days at sea?
The study of juvenile migration behavior of seabird species has been limited so far by the inability to track their movements during long time periods. Foraging and flying skills of young individuals are assumed to be inferior to those of adults, making them more vulnerable during long-distance migrations. In addition to natural oceanographic effects and intrinsic conditions, incidental seabird harvest by human fisheries is one of the main causes for worldwide seabird population declines, and it has been hypothesized that juveniles are particularly vulnerable to bycatch during their first weeks at sea after leaving the nest. We used solar powered satellite tags to track the at sea movements of adults and juveniles of Scopoli's shearwater (Calonectris diomedea) after the autumn departure from their breeding colony in Chafarinas Islands (southwestern Mediterranean Sea). Eighty percent of juvenile tags stopped transmitting during the first week at sea, within 50 km of their natal colony, in an area with one of the highest concentrations of fishing activities in the Mediterranean Sea. All adult birds tagged and only twenty per cent of juveniles migrated into the Atlantic and southwards along the coast of West Africa. The two age groups showed different habitat preferences, with juveniles travelling farther from the coast, in windier and less productive waters than adults. We conclude that Scopoli's shearwater juveniles are particularly vulnerable to mortality events, and we highlight that fisheries, along with differential age-related behavior skills between adults and juveniles, are likely causes of this mortality. Overall, our study highlights the importance of conducting tracking studies during the first stages of juvenile migration.
FIGURE 6 in Synopsis of Amphipoda from two recent Ross Sea voyages with description of a new species of Epimeria (Epimeriidae, Amphipoda, Crustacea)
FIGURE 6. Epimeria larsi sp. nov., colour in life, female paratype, 58 mm, NIWA 37752. Scale = 10 mm.
FIGURE 5 in Synopsis of Amphipoda from two recent Ross Sea voyages with description of a new species of Epimeria (Epimeriidae, Amphipoda, Crustacea)
FIGURE 5. Epimeria larsi sp. nov., male holotype, 39 mm, NIWA 48484: a, pereopod 5; b, pereopod 6; c, pereopod 7; d, uropod 1; e, uropod 2; f, uropod 3 dorsal view; g, uropod 3 ventral view; h, telson. Scale = 1 mm.
FIGURE 4 in Synopsis of Amphipoda from two recent Ross Sea voyages with description of a new species of Epimeria (Epimeriidae, Amphipoda, Crustacea)
FIGURE 4. Epimeria larsi sp. nov., male holotype, 39 mm, NIWA 48484: a, gnathopod 1; b, gnathopod 1 dactylus and propodus; c, gnathopod 2; d, gnathopod 2 dactylus and propodus; e, pereopod 3; f, pereopod 4; g, pleopod 1; h, apex of exopod of left pleopod 1. Scale = 1 mm.
FIGURE 2 in Synopsis of Amphipoda from two recent Ross Sea voyages with description of a new species of Epimeria (Epimeriidae, Amphipoda, Crustacea)
FIGURE 2. Epimeria larsi sp. nov., male holotype, 39 mm, NIWA 48484: a, lateral habitus; b, pleonites; c, maxilla 1; d, mandible; e, mandibular palp; f, left side of hypopharynx. Scale = 1 mm.
FIGURE 1 in Synopsis of Amphipoda from two recent Ross Sea voyages with description of a new species of Epimeria (Epimeriidae, Amphipoda, Crustacea)
FIGURE 1. Relative abundance of amphipods, split by family, collected during the BIOROSS and IPY expeditions to the western Ross Sea.
FIGURE 3 in Synopsis of Amphipoda from two recent Ross Sea voyages with description of a new species of Epimeria (Epimeriidae, Amphipoda, Crustacea)
FIGURE 3. Epimeria larsi sp. nov., male holotype, 39 mm, NIWA 48484: a, antenna 2; b, antenna 2, ventral view; c, antenna 1; d, maxilliped; e, maxilla 2. Scale = 1 mm.
Data from: Maiden voyage into death: are fisheries affecting seabird juvenile survival during the first days at sea?
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