Browsing Nansen Environmental and Remote Sensing Center (NERSC) by Document Types "Peer reviewed"

Now showing items 1-20 of 26

    • Analysis of merged SMMR-SSMI time series of Arctic and Antarctic sea ice parameters 1978-1995 

      Bjørgo, Einar; Johannessen, Ola M.; Miles, Martin W. (Journal article; Peer reviewed, 1997-02-15)
      The most consistent means of investigating the global sea ice cover is by satellite passive microwave sensors, as these are independent of illumination and cloud cover. The Nimbus 7 Scanning Multichannel Microwave Radiometer ...

    • Arctic Sea level Budget Assessment During the GRACE/Argo Time Period 

      Raj, Roshin Pappukutty; Andersen, Ole Baltazar; Johannessen, Johnny Andre; Benjamin, Gutknech; Chatterjee, Sourav; Rose, Stine; Bonaduce, Antonio; Horwath, Martin; Ranndal, Heidi; Richter, Kristin; Palanisamy, Hindumathi; Ludwigsen, Carsten; Bertino, Laurent; Nilsen, Jan Even Øie; Knudsen, Per; Hogg, Anna E.; Cazenave, Anny; Benveniste, Jérôme (Journal article; Peer reviewed, 2020)
      Sea level change is an important indicator of climate change. Our study focuses on the sea level budget assessment of the Arctic Ocean using: (1) the newly reprocessed satellite altimeter data with major changes in the ...

    • Barents Sea seasonal ice zone features and processes from ERS 1 synthetic aperture radar: Seasonal Ice Zone Experiment 1992 

      Sandven, Stein; Johannessen, Ola M.; Miles, Martin W.; Pettersson, Lasse H.; Kloster, Kjell (Journal article; Peer reviewed, 1999-07-15)
      Sea ice features and processes in the Barents Sea were studied during the Seasonal Ice Zone Experiment 1992 (SIZEX92), a dedicated ERS 1 satellite synthetic aperture radar (SAR) field campaign carried out in March 1992. ...

    • Coastal wind field retrievals from ERS synthetic aperture radar images 

      Korsbakken, E.; Johannessen, Johnny A.; Johannessen, Ola M. (Journal article; Peer reviewed, 1998-04-15)
      A unique series of European Remote Sensing Satellite (ERS) 1 and 2 C band synthetic aperture radar (SAR) images was obtained off the southern coast of Norway during the Coast Watch’95 experiment in September 1995. In this ...

    • Cover ERS-1/2 SAR monitoring of dangerous ice phenomena along the western part of Northern Sea Route 

      Johannessen, Ola M.; Sandven, Stein; Kloster, Kjell; Pettersson, Lasse H.; Melentyev, V. V.; Bobylev, Leonid P.; Kondratyev, K. Ya. (Journal article; Peer reviewed, 1997-08-01)

    • An ERS 1 synthetic aperture radar image of atmospheric lee waves 

      Vachon, P. W.; Johannessen, Ola M.; Johannessen, Johnny A. (Journal article; Peer reviewed, 1994-11-15)
      An ERS 1 synthetic aperture radar (SAR) image of the island Hopen shows a distinct 7.6-km wavelength wave phenomenon near the island. This wave phenomenon is interpreted as the surface imprint on open water of atmospheric ...

    • Evaluating Global Ocean Carbon Models: The Importance of Realistic Physics 

      Doney, S. C.; Lindsay, K.; Caldeira, Ken; Campin, J. M.; Drange, Helge; Dutay, J. C.; Follows, M.; Gao, Yongqi; Gnanadesikan, A.; Gruber, N.; Ishida, A.; Joos, Fortunat; Madec, G.; Maier-Reimer, E.; Marshall, J. C.; Matear, R. J.; Monfray, P.; Mouchet, A.; Najjar, R.; Orr, J. C.; Plattner, G. K.; Sarmiento, J. L.; Schlitzer, R.; Slater, R.; Totterdell, I. J.; Weirig, M. F.; Yamanaka, Y.; Yool, A. (Peer reviewed; Journal article, 2004-09-15)
      A suite of standard ocean hydrographic and circulation metrics are applied to the equilibrium physical solutions from 13 global carbon models participating in phase 2 of the Ocean Carbon-cycle Model Intercomparison Project ...

    • Evaluation of ocean carbon cycle models with data-based metrics 

      Matsumoto, K.; Sarmiento, J. L.; Key, R. M.; Aumont, O.; Bullister, J. L.; Caldeira, Ken; Campin, J. M.; Doney, S. C.; Drange, Helge; Dutay, J. C.; Follows, M.; Gao, Yongqi; Gnanadesikan, A.; Gruber, N.; Ishida, A.; Joos, Fortunat; Lindsay, K.; Maier-Reimer, E.; Marshall, J. C.; Matear, R. J.; Monfray, P.; Mouchet, A.; Najjar, R.; Plattner, G. K.; Schlitzer, R.; Slater, R.; Swathi, P. S.; Totterdell, I. J.; Weirig, M. F.; Yamanaka, Y.; Yool, A.; Orr, J. C. (Journal article; Peer reviewed, 2004-04-02)
      New radiocarbon and chlorofluorocarbon-11 data from the World Ocean Circulation Experiment are used to assess a suite of 19 ocean carbon cycle models. We use the distributions and inventories of these tracers as quantitative ...

    • Greenland Sea Odden sea ice feature: Intra-annual and interannual variability 

      Shuchman, Robert A.; Josberger, Edward G.; Russel, Catherine A.; Fischer, Kenneth W.; Johannessen, Ola M.; Johannessen, Johnny A.; Gloersen, Per (Journal article; Peer reviewed, 1998-06-15)
      The “Odden” is a large sea ice feature that forms in the east Greenland Sea that may protrude eastward to 5 °E from the main sea ice pack (at about 8 °W) between 73° and 77 °N. It generally forms at the beginning of the ...

    • The impact of ensemble filter definition on the assimilation of temperature profiles in the tropical Pacific 

      Leeuwenburgh, O.; Evensen, Geir; Bertino, Laurent (Journal article; Peer reviewed, 2005-10)
      The traditional analysis scheme in the Ensemble Kalman Filter (EnKF) uses a stochastic perturbation or randomization of the measurements which ensures a correct variance in the updated ensemble. An alternative so called ...

    • The Influence of large convective eddies on the surface-layer turbulence 

      Zilitinkevich, Sergej S.; Hunt, J.C.R; Esau, Igor N.; Grachev, A.A.; Lalas, D.P; Akylas, M.; Joffre, S.M. (Journal article; Peer reviewed, 2006-06)
      Close to the surface large coherent eddies consisting of plumes and downdraughts cause convergent winds blowing towards the plume axes, which in turn cause wind shears and generation of turbulence. This mechanism strongly ...

    • An intercomparison between the surface heat flux feedback in five coupled models, COADS and the NCEP reanalysis 

      Frankignoul, C.; Kestenare, E.; Botzet, M.; Carril, A. F.; Drange, Helge; Pardaens, A.; Terray, L.; Sutton, R. (Journal article; Peer reviewed, 2004-04)
      The surface heat flux feedback is estimated in the Atlantic and the extra-tropical Indo-Pacific, using monthly heat flux and sea surface temperature anomaly data from control simulations with five global climate models, ...

    • Last Glacial Maximum over China: Sensitivities of climate to paleovegetation and Tibetan ice sheet 

      Jiang, Dabang; Wang, Huijun; Drange, Helge; Lang, Xianmei (Journal article; Peer reviewed, 2003-02-06)
      With the boundary conditions appropriate for the Last Glacial Maximum (LGM), including ice sheets, sea surface temperatures, sea-ice distribution, atmospheric CO2 concentration, the Earth’s orbital parameters, topography, ...

    • Mesoscale modeling study of the oceanographic conditions off the southwest coast of India 

      Haugen, Vibeke E.; Johannessen, Ola M.; Evensen, Geir (Journal article; Peer reviewed, 2002-09)
      A high resolution model, using the Miami Isopycnic Coordinate Ocean Model (MICOM), has been implemented for the first time to study the seasonal circulation and coastal upwelling off the southwest Indian coast during 1974. ...

    • Multisensor approach to automated classification of sea ice image data 

      Bogdanov, Andrey V.; Alexandrov, Vitaly Y.; Sandven, Stein; Johannessen, Ola M.; Bobylev, Leonid P. (Journal article; Peer reviewed, 2005-07)
      A multisensor data fusion algorithm based on a multilayer neural network is presented for sea ice classification in the winter period. The algorithm uses European Remote Sensing (ERS), RADARSAT synthetic aperture radar ...

    • 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 Velocity Gradient in Stably Stratified Sheared Flows. Part 2: Observations and Models 

      Kouznetsov, Rostislav D.; Zilitinkevich, Sergej S. (Peer reviewed; Journal article, 2010-05-12)
      Observations of the dependence of the dimensionless wind speed gradient φm as a function of the Monin–Obukhov stability parameter z/Lo under strong stability diverge from results of large-eddy simulation (LES) modelling. ...

    • Passive tracers and active dynamics - a model study of hydrography and circulation in the northern North Atlantic 

      Mauritzen, C.; Hjøllo, Solfrid Sætre; Sandø, Anne Britt (Journal article; Peer reviewed, 2006-08)
      A long-standing problem in oceanography has been to understand the relationship between what can be measured in the ocean, such as hydrography, and what cannot, such as the strength and structure of the complete Meridional ...

    • 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 ...

    • Resistance and heat-transfer laws for stable and neutral planetary boundary layers: old theory advanced and re-evaluated 

      Zilitinkevich, Sergej S.; Esau, Igor N. (Journal article; Peer reviewed, 2005-07)
      The planetary boundary layer (PBL) resistance and heat-transfer laws express the surface fluxes of momentum and heat through the PBL governing parameters. Since the late sixties, the dimensionless coefficients (A, B and ...