Blar i Research centres and projects på forfatter "Johannessen, Ola M."
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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 ... -
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 ... -
Greenland Ice Sheet Elevation Ehange in Winter and Influence of Atmospheric Teleconnections in the Northern Hemisphere
Chen, Lin-Ling; Johannessen, Ola M.; Khvorostovsky, Kirill; Wang, Huijun (Journal article, 2009-11-16) -
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 ... -
Indian Ocean: Validation of the Miami Isopycnic Coordinate Ocean Model and ENSO events during 1958–1998
Haugen, Vibeke E.; Johannessen, Ola M.; Evensen, Geir (Journal article, 2002-05-25)In the Indian Ocean, in situ data are sparse both in time and space. Therefore, numerical models are one of the major tools for further understanding of the ocean circulation. We have implemented, validated, and done a 40 ... -
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. ... -
Microwave Study programs of Air-Ice-Ocean interactive processes in the Seasonal Ice Zone of the Greenland and Barents Seas
Johannessen, Ola M.; Campbell, William J.; Shuchman, Robert A.; Sandven, Stein; Gloersen, Per; Johannessen, Johnny A.; Josberger, Edward G.; Haugan, Peter Mosby (Geophysical Monograph 68, Chapter, 1992)Describes the use of satellite ice data into a working technology for the satellite data sets of the recent past and immediate future. Chapters cover basic observations, modeling, geophysical interpretation, and using data ... -
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 ... -
Satellite detection of natural films on the ocean surface
Espedal, Heidi A.; Johannessen, Ola M.; Knulst, Johan (Journal article; Peer reviewed, 1996-11-01)Natural films on the ocean surface influence air-sea fluxes of momentum, heat, and gas. It is therefore essential to be able to map the geographical extent and variability of such films to determine the resulting impact ... -
Sea Ice Monitoring by Remote Sensing
Sandven, Stein; Johannessen, Ola M. (, Chapter, 2006)