Søk
Viser treff 1011-1020 av 2805
Norway-Russia disaster diplomacy for Svalbard
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-07-03)
The Arctic is frequently framed as a region of disaster and conflict, as well as of opportunity and cooperation. Disaster diplomacy is one approach for examining how dealing with disasters might or might not affect conflict and cooperation, yet little work on Arctic disaster diplomacy has been completed, especially regarding specific bilateral relations. This paper contributes to filling in this gap ...
The Story of 5d Metallocorroles: From Metal–Ligand Misfits to New Building Blocks for Cancer Phototherapeutics
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-07-23)
CONSPECTUS: Porphyrin chemistry is Shakespearean: over a century of study has
not withered the field’s apparently infinite variety. Heme proteins continually
astonish us with novel molecular mechanisms, while new porphyrin analogues bowl
us over with unprecedented optical, electronic, and metal-binding properties.
Within the latter domain, corroles occupy a special place, exhibiting a unique ...
Hydrothermal dedolomitisation of carbonate rocks of the Paleoproterozoic Zaonega Formation, NW Russia — Implications for the preservation of primary C isotope signals
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-03-03)
The Paleoproterozoic Zaonega Formation in Karelia, NW Russia, has played a key role in understanding the environmental conditions postdating the Great Oxidation and Lomagundi-Jatuli Events. Its carbonate- and organic-rich rocks (shungite) define the postulated Shunga Event representing an accumulation of very organic-rich sediments at c. 2 Ga and are central in ideas about changing ocean-atmosphere ...
Evolution of a shear zone before, during and after melting
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-03-03)
Partial melt in the deforming mid- or lower continental crust causes a strength decrease and drives formation of lithological heterogeneities. However, mechanisms of formation of syn-melt deformation zones and strain partitioning in partially molten rock remain poorly understood. We use field and microstructural observations to unravel the evolution of a partial melt shear zone, Seiland Igneous ...
Robustness of SAR Sea Ice Type classification across incidence angles and seasons at L-band
(Journal article; Tidsskriftartikkel, 2020-11-16)
In recent years, space-borne synthetic aperture radar (SAR) polarimetry has become a valuable tool for sea ice type retrieval. L-band SAR has proven to be sensitive toward deformed sea ice and is complementary compared with operationally used C-band SAR for sea ice type classification during the early and advanced melt seasons. Here, we employ an artificial neural network (ANN)-based sea ice type ...
On the symmetry of ionospheric polar cap patch exits around magnetic midnight
(Journal article; Tidsskriftartikkel; Peer reviewed, 2015-07-14)
In this paper we examine how polar cap patches, which have been frozen into the antisolar flow
over the polar cap, are transported into the nighttime auroral oval. First we present a detailed case study from
12 January 2002, with continuous observations of polar cap patches exiting into the nighttime auroral oval
in the Scandinavian sector. Satellite images of the auroral oval and all-sky camera ...
Faster decline and higher variability in the sea ice thickness of the marginal Arctic seas when accounting for dynamic snow cover
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-06-04)
Mean sea ice thickness is a sensitive indicator of Arctic climate change and is in long-term decline despite significant interannual variability. Current thickness estimations from satellite radar altimeters employ a snow climatology for converting range measurements to sea ice thickness, but this introduces unrealistically low interannual variability and trends. When the sea ice thickness in the ...
Resistivity of reservoir sandstones and organic rich shales on the Barents Shelf: Implications for interpreting CSEM data
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-03)
Marine controlled source electromagnetic (CSEM) data have been utilized in the past decade during petroleum exploration of the Barents Shelf, particularly for de-risking the highly porous sandstone reservoirs of the Upper Triassic to Middle Jurassic Realgrunnen Subgroup. In this contribution we compare the resistivity response from CSEM data to resistivity from wireline logs in both water- and ...
Identifying global vs. basinal controls on Paleoproterozoic organic carbon and sulfur isotope records
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-03)
Paleoproterozoic sedimentary successions are important archives of the redox evolution of Earth’s atmosphere and oceans. Efforts to unravel the dynamics of our planet’s early oxygenation from this archive rely on various geochemical proxies, including stable carbon and sulfur isotopes. However, ancient metasedimentary rocks often experienced early- and late-stage (bio)geochemical processes making ...
A Holistic View of Health Infrastructure Resilience before and after COVID-19
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-04)
Background: Large-scale events such as COVID-19 show that there are situations that can lead to huge stress on health
infrastructure systems (HIS). The pandemic reveals that it is very difficult to protect HIS from all kinds of possible hazards.
They can be unpredictable and spread rapidly; hence, it is hard to find an effective mitigation strategy to completely protect
society and its important ...