Browsing Bergen Open Research Archive by Author "Drange, Helge"
Now showing items 21-40 of 40
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Modelling of deep-sea gravity currents using an integrated plume model
Alendal, Guttorm; Drange, Helge; Haugan, Peter Mosby (Geophysical Monograph Series; 85, Chapter, 1994) -
Nordic Seas Heat Loss, Atlantic Inflow, and Arctic Sea Ice cover over the last century
Smedsrud, Lars Henrik; Muilwijk, Morven; Eldevik, Tor; Årthun, Marius; Brakstad, Ailin; Madonna, Erica; Lauvset, Siv Kari; Spensberger, Clemens; Born, Andreas; Drange, Helge; Jeansson, Emil; Li, Camille; Olsen, Are; Skagseth, Øystein; Slater, Donald; Straneo, Fiammetta; Våge, Kjetil (Journal article; Peer reviewed, 2021)Poleward ocean heat transport is a key process in the earth system. We detail and review the northward Atlantic Water (AW) flow, Arctic Ocean heat transport, and heat loss to the atmosphere since 1900 in relation to sea ... -
The North Atlantic Oscillation and greenhouse-gas forcing
Kuzmina, Svetlana I.; Bengtsson, Lennart; Johannessen, Ola M.; Drange, Helge; Bobylev, Leonid P.; Miles, Martin W. (Peer reviewed; Journal article, 2005-02-17)The results of 12 coupled climate models participating in the Coupled Model Intercomparison Project (CMIP2) are compared together with observational data in order to investigate: 1) How the current generation of climate ... -
Observing the Ocean from Space: Emerging Capabilities in Europe
Johannessen, Johnny A.; Le Provost, Christian; Drange, Helge; Srokosz, Meric; Woodworth, Philip; Sclüssel, Peter; Le Grand, Pascal; Kerr, Yann; Wingham, Duncan; Rebhan, Helge (Chapter, 2001-12)During the first decade of the 21st century Earth observation from satellites will be faced with two major demands: provision of continuity missions and launch of new exploratory missions. This paper addresses European ... -
Ocean release of fossil fuel CO2: A case study
Drange, Helge; Alendal, Guttorm; Johannessen, Ola M. (Journal article; Peer reviewed, 2001-07-01)The natural ocean uptake of the greenhouse gas CO2 can be accelerated by collecting and liquefying the gas from point sources, and by pumping it into the ocean at appropriate locations and at sufficient depths. Results ... -
On the recent time history and forcing of the inflow of Atlantic Water to the Arctic Mediterranean
Nilsen, Jan Even Øie; Hátún, Hjalmar; Sandø, Anne Britt; Bethke, Ingo; Laurantin, Olivier; Gao, Yongqi; Drange, Helge; Furevik, Tore (Extended Abstract for The ACIA International Scientific Symposium on Climate Change in the Arctic, Conference lecture, 2004) -
A Possible Feedback Mechanism Involving the Arctic Freshwater, the Arctic Sea Ice, and the North Atlantic Drift
Otterå, Odd Helge; Drange, Helge (Advances in Atmospheric Sciences;21( 5), Journal article, 2004-03-15)Model studies point to enhanced warming and to increased freshwater fluxes to high northern latitudes in response to global warming. In order to address possible feedbacks in the ice-ocean system in response to such changes, ... -
A preliminary study on the relationship between Arctic Oscillation and daily SLP variance in the Northern hemisphere during wintertime
Gong, Daoyi; Drange, Helge (Journal article; Peer reviewed, 2005-01-20)In the present study, the authors investigated the relationship between the Arctic Oscillation (AO) and the high-frequency variability of daily sea level pressures in the Northern Hemisphere in winter (November through ... -
Relative Impacts of Sea Ice Loss and Atmospheric Internal Variability on the Winter Arctic to East Asian Surface Air Temperature Based on Large-Ensemble Simulations with NorESM2
He, Shengping; Drange, Helge; Furevik, Tore; Wang, Hui-Jun; Fan, Ke; Graff, Lise Seland; Orsolini, Yvan Joseph Georges Emile G. (Journal article; Peer reviewed, 2024)To quantify the relative contributions of Arctic sea ice and unforced atmospheric internal variability to the “warm Arctic, cold East Asia” (WACE) teleconnection, this study analyses three sets of large-ensemble simulations ... -
Seasonal to Decadal Temperature Variations in the Faroe-Shetland Inflow Waters
Hátún, Hjalmar; Sandø, Anne Britt; Drange, Helge; Bentsen, Mats (AGU Geophysical Monograph Series;158, Chapter, 2005)A 53 years hind-cast simulation with a regional version of the Nansen Center version of the Miami Isopycnic Coordinate Ocean Model (MICOM) has been conducted to explore the nature of the observed seasonal to inter-annual ... -
The sensitivity of the present day Atlantic meriodinal overturning circulation to freshwater forcing
Otterå, Odd Helge; Drange, Helge; Bentsen, Mats; Kvamstø, Nils Gunnar; Jiang, Dabang (Peer reviewed; Journal article, 2003-09-09)Mounting evidence indicates that the Atlantic Meridional Overturning Circulation (AMOC) was strongly reduced during cold climate episodes in the past, possible due to freshwater influx from glacial melting. It is also ... -
Simulated North Atlantic-Nordic Seas water mass exchanges in an isopycnic coordinate OGCM
Nilsen, Jan Even Øie; Gao, Yongqi; Drange, Helge; Furevik, Tore; Bentsen, Mats (Journal article, 2003-05-29)The variability in the volume exchanges between the North Atlantic and the Nordic Seas during the last 50 years is investigated using a synoptic forced, global version of the Miami Isopycnic Coordinate Ocean Model (MICOM). ... -
Simulated variability of the Atlantic meridional overturning circulation
Bentsen, Mats; Drange, Helge; Furevik, Tore; Zhou, Tianjun (Journal article, 2004-04-17)To examine the multi-annual to decadal scale variability of the Atlantic Meridional Overturning Circulation (AMOC), a four-member ensemble with a daily reanalysis forced, medium-resolution global version of the isopycnic ... -
Simulating transport of non-Chernobyl 137Cs and 90Sr in the North Atlantic–Arctic region
Gao, Yongqi; Drange, Helge; Bentsen, Mats; Johannessen, Ola M. (Peer reviewed; Journal article, 2004)The spatial and temporal distributions of the anthropogenic radionuclides 137Cs and 90Sr, originating from nuclear bomb testing and the Sellafield reprocessing plants in the Irish Sea, are simulated using a global version ... -
Skillful prediction of northern climate provided by the ocean
Årthun, Marius; Eldevik, Tor; Viste, Ellen; Drange, Helge; Furevik, Tore; Johnson, Helen L.; Keenlyside, Noel (Peer reviewed; Journal article, 2017-06-20)It is commonly understood that a potential for skillful climate prediction resides in the ocean. It nevertheless remains unresolved to what extent variable ocean heat is imprinted on the atmosphere to realize its predictive ... -
Temporal and spatial variability of the sea surface salinity in the Nordic Seas
Furevik, Tore; Bentsen, Mats; Drange, Helge; Johannessen, Johnny A.; Korablev, Alexander (Peer reviewed; Journal article, 2002-11-02)In this paper, the temporal and spatial variability of the sea surface salinity (SSS) in the Nordic Seas is investigated. The data include a Russian hydrographical database for the Nordic Seas and daily to weekly observations ... -
Towards a more saline North Atlantic and a fresher Arctic under global warming
Bethke, Ingo; Furevik, Tore; Drange, Helge (Peer reviewed; Journal article, 2006-11-14)Most atmosphere-ocean general circulation models (GCMs) forced with increasing greenhouse gas concentrations predict enhanced atmospheric moisture transports to the high northern latitudes. Together with melting of Arctic ... -
Tracer-derived transit time of the waters in the eastern Nordic Seas
Gao, Yongqi; Drange, Helge; Bentsen, Mats; Johannessen, Ola M. (Peer reviewed; Journal article, 2005-08-25)The spatial-temporal distribution of the anthropogenic radionuclide 137Cs originating from nuclear bomb testing and the Sellafield reprocessing plant in the Irish Sea is simulated using a global version of the Miami Isopycnic ... -
Transient response of the Atlantic Meridional Overturning Circulation to enhanced freshwater input to the Nordic Seas–Arctic Ocean in the Bergen Climate Model
Otterå, Odd Helge; Drange, Helge; Bentsen, Mats; Kvamstø, Nils Gunnar; Jiang, Dabang (Tellus A;56(4), Journal article, 2004-07-09)The transient response of the climate system to anomalously large freshwater input to the high latitude seas is examined using the newly developed Bergen Climate Model. A 150-yr twin-experiment has been carried out, ... -
Two-phase, near-field modeling of purposefully released CO2 in the ocean
Alendal, Guttorm; Drange, Helge (Journal article; Peer reviewed, 2001-01-15)