Browsing Institutt for geofag by Title
Now showing items 1129-1148 of 3032
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(Doctoral thesis / Doktoravhandling, 2014)Glaciers are among the most frequently used natural phenomena to illustrate ongoing global warming. Retreating glacier tongues and the reduction of glacierized areas are visible all over the world. Changes in glacier volume ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)With its temporal resolution of 10 days (five days with two satellites, and significantly more at high latitudes), its swath width of 290 km, and its 10 m and 20 m spatial resolution bands from the visible to the shortwave ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)Mapping of glacier extents from automated classification of optical satellite images has become a major application of the freely available images from Landsat. A widely applied method is based on segmented ratio images ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)To characterize the spatiotemporal variations of glacier surface speed on the Kenai Peninsula, Alaska (∼3,900 km2), we derived 92 surface speed fields between October 2014 and December 2019 using intensity offset tracking ...
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(Doctoral thesis / Doktoravhandling, 2009)This thesis presents a study of the landsystem of the Svalbard tidewater glacier Paulabreen and its late Holocene surge moraines, focusing on the glaciology and the glacial geology. An active surge of Skobreen/Paulabreen ...
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(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)Glaciers are a critical freshwater resource of river recharge in arid areas around the world. In recent decades, glaciers have shown evidence of retreat due to climate change, and the accelerated ablation of glaciers and ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)Digitized aerial images were used to monitor the evolution of perennially frozen debris and polythermal glacier ice at the intensely investigated Gruben site in the Swiss Alps over a period of about 50 years. The photogrammetric ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)Mass loss from glaciers and ice sheets currently accounts for two-thirds of the observed global sea-level rise and has accelerated since the 1990s, coincident with strong atmospheric warming in the polar regions. Here we ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)Large amounts of methane are stored in continental margins as gas hydrates. They are stable under high pressure and low temperature, but react sensitively to environmental changes. Bottom water temperature and sea level ...
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(Master thesis / Masteroppgave, 2012)Glacio-meteorological investigations were conducted on Storbreen glacier, as an attempt to assess the relationship between meteorological conditions at the glacier surface and its mass balance. Primary focus was set on the ...
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(Chapter / Bokkapittel / AcceptedVersion; Peer reviewed, 2023)Glacier mapping is essential for studying and monitoring the impacts of climate change. However, several challenges such as debris-covered ice and highly variable landscapes across glacierized regions worldwide complicate ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)The evolution of the Northern Hemisphere oceanic gateways has facilitated ocean circulation changes and may have influenced climatic variations in the Cenozoic time (66 Ma–0 Ma). However, the timing of these oceanic gateway ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)Abstract Using global Sentinel-1 radar backscatter data, we systematically map the locations of glaciers with surge-type activity during 2017–22. Patterns of pronounced increases or decreases in the strongest backscatter ...
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(Master thesis / Hovedoppgave, 2005)In spite of increasing surface temperatures, a falling trend in surface insolation has been observed over the past 50 years at stations worldwide, and a link to anthropogenic aerosols has been suggested. In the present ...
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(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)Many of our planet's “crises” were the result of sudden changes in plate tectonic configuration or catastrophic outbursts of volcanism caused by mantle plume impingement at the base of the lithosphere. At the Paleocene-Eocene ...
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(Master thesis / Masteroppgave, 2014)
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(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2023)Glacier mass loss affects sea level rise, water resources, and natural hazards. We present global glacier projections, excluding the ice sheets, for shared socioeconomic pathways calibrated with data for each glacier. ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)Abstract. Interactions between aerosols and liquid clouds are one of the largest sources of uncertainty in the historical radiative forcing of climate. One widely shared goal to reduce this uncertainty is to decompose ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)Large explosive tropical volcanic eruptions inject high amounts of gases into the stratosphere, where they disperse globally through the large-scale meridional circulation. There is now increasing observational evidence ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)The validity of sea level estimates based on stratigraphic correlations has been debated since the 1990 s as relative sea level curves differ between sites due to local tectonics, different deposition rates and changes in ...