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  • Contribution of fluorescent primary biological aerosol particles to low-level Arctic cloud residuals 

    Pereira Freitas, Gabriel; Kopec, Ben; Adachi, Kouji; Krejci, Radovan; Heslin-Rees, Dominic; Yttri, Karl Espen; Hubbard, Alun Lloyd; Welker, Jeffrey M.; Zieger, Paul (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-05-13)
    Mixed-phase clouds (MPCs) are key players in the Arctic climate system due to their role in modulating solar and terrestrial radiation. Such radiative interactions rely, among other factors, on the ice content of MPCs, which is regulated by the availability of ice-nucleating particles (INPs). While it appears that INPs are associated with the presence of primary biological aerosol particles (PBAPs) ...
  • Molecules and Morphotypes – Exploring benthic foraminiferal biodiversity in seep-influenced habitats 

    Holm, Villads Dyrved (Master thesis; Mastergradsoppgave, 2023-05-15)
    Beneath the seafloor, methane, a potent greenhouse gas, is trapped in ice-like structures, prone to destabilization and gas release in a warming climate. Gas releases through the seabed concentrated in seeps, creating unique ecosystems, hostile to some lifeforms but able to sustain others. Foraminifera have proved useful in biodiversity and ecosystem quality assessment due to their ubiquity in ...
  • Insights into glacial processes from micromorphology of silt-sized sediment 

    Lepp, Allison P.; Miller, Lauren E.; Anderson, John B.; O’Regan, Matt; Winsborrow, Monica Caroline Mackay; Smith, James A.; Hillenbrand, Claus-Dieter; Wellner, Julia S.; Prothro, Lindsay O.; Podolskiy, Evgeny A. (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-05-07)
    Silt-rich meltwater plume deposits (MPDs) analyzed from marine sediment cores have elucidated relationships that are clearly connected, yet difficult to constrain, between subglacial hydrology, ice-marginal landforms, and grounding-zone retreat patterns for several glacial catchments. Few attempts have been made to infer details of subglacial hydrology, such as flow regime, geometry of drainage ...
  • Acoustic evidence of hydrocarbon release associated with the Spitsbergen Transform Fault, north of the Molloy Ridge, Fram Strait 

    Chand, Shyam; Knies, Jochen Manfred; Geissler, Wolfram H.; Plaza Faverola, Andreia Aletia; Thorsnes, Terje (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-04-16)
    Hydrocarbon gases formed from biotic and abiotic processes are released through the seafloor at different locations around the world. They have been widely observed directly in video and photo data, and indirectly on echosounder data. Even though biotic gas generation is a very common process, abiotic gas generation is limited to regions where serpentinization of ultramafic rocks occur. Indications ...
  • Sedimentological and geochemical investigations of hydrothermally impacted sediments at the Aurora vent field, Fram Strait 

    Bjørnå, Eivind Urbye (Mastergradsoppgave; Master thesis, 2023-05-15)
    Hydrothermal vents are the result of the interaction between seawater and magma and occur at regular intervals along mid ocean ridges. The first visual confirmation of plumes was done in 1977. The detection of hydrothermal plumes has both provided indirect evidence for their existence and a resolution of the occurrences . In deep ocean with low sedimentation rates, hydrothermal plumites have the ...
  • Formation of non-evaporitic gypsum in gas hydrate-bearing sediments at Håkon Mosby mud volcano, SW Barents sea 

    Wittig, Cathrin; Argentino, Claudio; Panieri, Giuliana (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-04-29)
    Authigenic minerals such as carbonate and iron sulfide are known features at cold seeps worldwide and form as a result of the anaerobic oxidation of methane in the sulfate-methane transition zone (SMTZ). Recent findings of seep-related non-evaporitic gypsum raise questions regarding its distribution, formation mechanisms, and relationships with the other proxies for confident paleo-seep reconstructions. ...
  • Petrochronology of the Dom Feliciano Belt foreland in southernmost Brazil reveals two distinct tectonometamorphic events in the western central Kaoko–Dom Feliciano–Gariep orogen 

    Battisti, Matheus Ariel; Konopásek, Jiří; Bitencourt, Maria de Fatima; Slama, Jiri; Percival, Jack James; De Toni, Giuseppe Betino; Carvalho da Silva, Stephanie; Oliveira da Costa, Elisa; Trubac, Jakub (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-04-26)
    The Dom Feliciano Belt is the South American part of an extensive Neoproterozoic orogenic system that developed during the late Cryogenian–early Cambrian close to the margin of southwest Gondwana. The link of its evolution with the tectonic processes in its African counterpart is still not well understood. P–T estimates, Lu–Hf garnet–whole-rock ages, U–Pb monazite SIMS ages and REE garnet and monazite ...
  • The Roles of Light Absorbing Particles in the Norwegian Arctic Snow 

    Olanrewaju, Olasubomi Quadri (Mastergradsoppgave; Master thesis, 2023-05-08)
    Light absorbing particles (LAPs) such as black carbon (BC) and dust can reduce snow albedo and have a positive radiative forcing. Previous studies investigating LAP in snow in Tromsø focused on black carbon (BC) also called elemental carbon because it has human sources, but dust should also be considered because, while largely from natural sources, it is present in higher concentrations. To quantify ...
  • Biodegradable plastics in Mediterranean coastal environments feature contrasting microbial succession 

    de Vogel, Fons A.; Goudriaan, Maaike; Zettler, Erik R.; Niemann, Helge; Eich, Andreas; Weber, Miriam; Lott, Christian; Amaral-Zettler, Linda A. (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-04-08)
    Plastic pollution of the ocean is a top environmental concern. Biodegradable plastics present a potential “solution” in combating the accumulation of plastic pollution, and their production is currently increasing. While these polymers will contribute to the future plastic marine debris budget, very little is known still about the behavior of biodegradable plastics in different natural environments. ...
  • The Eurasian Ice Sheet: Status and Challenges 

    Winsborrow, Monica Caroline Mackay; Hughes, Anna; Greenwood, Sarah L. (Conference object; Konferansebidrag, 2024-03-15)
  • Modelling the Eurasian Ice Sheet 

    Patton, Henry Jared (Conference object; Konferansebidrag, 2024-03-15)
  • Contamination of 8.2 ka cold climate records by the Storegga tsunami in the Nordic Seas 

    Bondevik, Stein; Risebrobakken, Bjørg; Gibbons, Steven J.; Rasmussen, Tine Lander; Løvholt, Finn (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-04-04)
    The 8200-year BP cooling event is reconstructed in part from sediments in the Norwegian and North Seas. Here we show that these sediments have been reworked by the Storegga tsunami – dated to the coldest decades of the 8.2 ka event. We simulate the maximum tsunami flow velocity to be 2–5 m/s on the shelf offshore western Norway and in the shallower North Sea, and up to about 1 m/s down to a water ...
  • NordVulk 1974-2024 

    Sturkell, Erik; Schomacker, Anders (Journal article; Tidsskriftartikkel; Peer reviewed, 2024)
    Nordisk Vulkanologisk Institut, senare känt som Nordisk Vulkanologisk Center (NordVulk) på Island fyller 50 år 2024. Tyvärr sammanfaller jubileet med att NordVulk upphör i sin nuvarande form och en lång och framgångsrik era med nordisk vulkanologisk forskning på Island tar slut. Här berättar vi lite om NordVulks historia och bifogar några korta anekdoter från livet där.
  • Glacial-interglacial sedimentation control on gas seepage exemplified by Vestnesa Ridge off NW Svalbard margin 

    Rasmussen, Tine Lander; Nielsen, Tove (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-04-08)
    Vestnesa Ridge is built-up of thick contourites mainly deposited during the last ∼5 million years. Methane leaks from deep gas reservoirs creating pockmarks on its crest, and which have been the focus of numerous studies. Sedimentation patterns in relation to the pronounced changes in oceanography and climate of the last glacial-interglacial cycles and its possible impact of seepage of gas have ...
  • New cold seep sites on the continental slope southwest to Svalbard 

    Bellec, Valerie Karin; Chand, Shyam; Knies, Jochen Manfred; Bjarnadóttir, Lilja Rún; Lepland, Aivo; Sen, Arunima; Thorsnes, Terje (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-04-09)
    We discovered seafloor features such as bacterial mats and carbonate crusts typical for active methane seeps on the continental slope southwest of Svalbard. These features are associated with two main northwest-southeast trending morphological structures that are oriented parallel to the regional continental slope. Both structures occur at c. 800 m water depth, at the boundary between the Storfjorden ...
  • Characterizing vegetation and return periods in avalanche paths using lidar and aerial imagery 

    Peitzsch, Erich H.; Martin-Mikle, Chelsea; Hendrikx, Jordy; Birkeland, Karl; Fagre, Daniel (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-04-14)
    Snow avalanches are a hazard and ecological disturbance across mountain landscapes worldwide. Understanding how avalanche frequency affects forests and vegetation improves infrastructure planning, risk management, and avalanche forecasting. We implemented a novel approach using lidar, aerial imagery, and a random forest model to classify imagery-observed vegetation within avalanche paths in southern ...
  • Influence of a rigid backstop on the flow pattern during thrusting of the supracrustal Balsfjord Series of the North Norwegian Caledonides 

    Höpfl, Stephan Maximilian; Konopásek, Jiří; Sláma, Jiří (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-17)
    The Caledonian evolution of the low–medium grade Balsfjord Series (Troms, Northern Norway) is characterized by four sets of deformation structures that developed progressively during burial and exhumation from underneath the high-grade Nakkedal and Tromsø nappe complexes. The Balsfjord Series commonly displays top-to-the SSE–SE directed movement during the development of the main metamorphic fabric ...
  • Persistence of Holocene ice cap in northeast Svalbard aided by glacio-isostatic rebound 

    Farnsworth, Wesley Randall; Ingólfsson, Ólafur; Brynjólfsson, Skafti; Allaart, Lis; Kjellman, Sofia Elisabeth; Kjær, Kurt H.; Larsen, Nicolaj K.; Macias-Fauria, Marc; Siggaard-Andersen, Marie-Louise; Schomacker, Anders (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-29)
    The deglaciation of the Svalbard-Barents Sea Ice Sheet was driven by relative sea-level rise, the incursion of North Atlantic waters around Spitsbergen, and increasing summer insolation. However, ice retreat was inter rupted by asynchronous re-advances that occurred into high relative seas, during a period associated with warm regional waters and elevated summer temperatures. Better understanding ...
  • Tracing Subducted Carbonates in Earth's Mantle Using Zinc and Molybdenum Isotopes 

    Wang, Jian; Tang, Gong-Jian; Tappe, Sebastian; Li, Jie; Zou, Zongqi; Wang, Qiang; Su, Yu-Ping; Zheng, Jian-Ping (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-02-23)
    Although carbonates are the primary form of carbon subducted into the mantle, their fate during recycling is debated. Here we report the first coupled high-precision Zn and Mo isotope data for Cenozoic intraplate basalts from western China. The exceptionally high δ<sup>66</sup>Zn values (+0.39 to +0.50‰) of these lavas require involvement of recycled carbonates in the mantle source. Variable ...
  • Biogeochemical impact of historical submarine mine tailings on benthic ecosystems in the Repparfjord (Northern Norway) 

    Hoff, Marie; Argentino, Claudio; Huljek, Laura; Fiket, Zeljka; Mun, Yulia; Barrenechea Angeles, Inés; Strmic Palinkas, Sabina; Panieri, Giuliana (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-08)
    Historical copper mine tailings deposited in the Repparfjord, Northern Norway, provided new insight into the biogeochemical impact of submarine tailings disposals on high-latitude coastal ecosystems. The submarine tailings disposal in the Repparfjord represents a product of mining activities between 1972 and 1979. Their environmental impact has been extensively studied during the last decade, but ...

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