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Found 9 results

  1. THE ARCTIC THREAD This is a brand new thread for everything to do with the Arctic as well as Antarctica. I hope that many forum members will contribute on here. I have been a keen weather enthusiast for well over 50 years and have developed widespread interests in many meteorological topics. I have always been particularly fascinated by the Arctic and how it interacts with global climate patterns. We have seen a worrying decline in Arctic sea ice extent during the last 30 years and the Arctic has become the centre of the global warming and climate change debate. Whilst this is undoubted
  2. The Birth of an Ocean: How the Present Day Arctic was Formed Authors: Connor Drooff, Cullen Kortyna and Margaret Odlum Published By: "NOR-R-AM" A Norwegian-Russian-North American collaboration in Arctic research and collaboration Published online: 30th September, 2018 Abstract: The Arctic Ocean, located in the north polar region, is Earth’s smallest and shallowest ocean. It is partly covered by sea ice all year. The ocean is divided by the Lomonosov Ridge into two basins, the Amerasian Basin and the Eurasian Basin, and is surround
  3. Eurasia Basin and Gakkel Ridge, Arctic Ocean: Crustal asymmetry, ultra-slow spreading and continental rifting revealed by new seismic data Authors: A.M.Nikishin et al Published in "Tectonophysics": 30th October, 2018 Abstract: High Arctic new seismic data, collected by Russian Federation from 2011 to 2014, and additional geological and geophysical information, are used to interpret the basement and sedimentary structure of central and eastern Eurasia Basin, the Gakkel Ridge, and their transition into the Laptev Sea. We find that significant changes
  4. Hydrothermal vents found in Arctic Ocean Authors: Lidia Wasowicz Published online: 16th January, 2003 Abstract: A geologically sluggish region deep within the Arctic Ocean's frigid waters has turned out to be a surprisingly hot spot of hydrothermal activity. Marine scientists on a maiden voyage to the remote area near the North Pole discovered at least nine submarine vents spewing sizzling fountains -- and portending the possible existence of exotic life -- along the Gakkel ridge, a barely budging mid-ocean mountain chain 3 miles below th
  5. North Atlantic hotspot-ridge interaction near Jan Mayen Island Authors: Lynne J. Elkins et al Published online: 22nd January, 2016 Abstract: At slow to ultraslow spreading rates along mid-ocean ridges, thicker lithosphere typically impedes magma generation and tectonic extension can play a more significant role in crustal production (Dick et al., 2003). The source of anomalously high magma supply thus remains unclear along ridges with ultraslow-spreading rates adjacent to Jan Mayen Island in the North Atlantic (Neumann and Schilling, 1984; Mertz et
  6. Discovery of a black smoker vent field and vent fauna at the Arctic Mid-Ocean Ridge Authors: Rolf B. Pedersen et al Published online: 23rd November, 2010 Abstract: The Arctic Mid-Ocean Ridge (AMOR) represents one of the most slow-spreading ridge systems on Earth. Previous attempts to locate hydrothermal vent fields and unravel the nature of venting, as well as the provenance of vent fauna at this northern and insular termination of the global ridge system, have been unsuccessful. Here, we report the first discovery of a black smoker vent field at the
  7. Importance of Hydrothermal Vents in Scavenging Removal of 230Th in the Nansen Basin Authors: O. Valk et al Published online: 19th September, 2018 Abstract: In this study we present dissolved and particulate 230Th and 232Th results, as well as particulate 234Th data, obtained as part of the GEOTRACES central Arctic Ocean sections GN04 (2015) and IPY11 (2007). Samples were analyzed following GEOTRACES methods and compared to previous results from 1991. We observe significant decreases in 230Th concentrations in the deep waters of the Nansen Basin. We a
  8. Radiative Impacts of Volcanic Aerosol in the Arctic Authors: Cindy L. Young and Jennifer W. Telling Published: 21st September, 2016 Abstract: High latitude volcanic eruptions are high-frequency and intensity events capable of releasing large amounts of aerosols into the environment. Studies have shown that the Arctic is particularly sensitive to radiative perturbations due to aerosols, and a high sensitivity to volcanic aerosols would be expected. Despite the potential for volcanic aerosols to significantly perturb the Arctic radiation balance, the r
  9. Giant caldera in the Arctic Ocean: Evidence of the catastrophic eruptive event Authors: Alexey Piskarev and Daria Elkina Published (In "Science Reports"): 10th April, 2017 Abstract: A giant caldera located in the eastern segment of the Gakkel Ridge could be firstly seen on the bathymetric map of the Arctic Ocean published in 1999. In 2014, seismic and multibeam echosounding data were acquired at the location. The caldera is 80 km long, 40 km wide and 1.2 km deep. The total volume of ejected volcanic material is estimated as no less than 3000 km3 placi
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