NERSC News Archive

Publication on the vulnerabilities of marine and sea ice–based ecosystems

The paper “Critical vulnerabilities of marine and sea ice–based ecosystems in the high Arctic” has been published in Regional Environ Change.

The objectives of the paper are to summarise: (1) observed 20th-century and projected 21st-century changes in key components of the Arctic climate system and (2) probable impacts on the Arctic marine environment, with emphasis on the vulnerabilities of marine and sea ice–based ecosystems.

Nansen-Tutu Centre scientific opening seminar

The scientific opening seminar for the Nansen-Tutu Centre for Marine Environmental Research has during the last days gathered 90 scientist and students in Cape Town, South Africa. The seminar is organized in collaboration with Centre for High Performance Computing in South Africa.

The seminar focus on the research challenges in monitoring and predicting ocean state in the waters surrounding South Africa where strong cold and warm ocean currents interacts, periodic upwelling occurs and with a complex, diverse and vulnerable marine ecosystem.

Doctoral dissertation on data assimilation in oil reservoir modeling

Dr. Alexandra Seiler has very successfully defended her Ph.D. thesis ”Reservoir Structural Model Updating Using the Ensemble Kalman Filter” at the Faculty of Science at University of Bergen. The work has been performed at the Nansen Center and Statoil ASA, within the Research Council of Norway eVita project coordinated by the Nansen Center.

Chinese Academy of Sciences Appointment

Professor Ola M. Johannessen, executive chairman of the Board of the Nansen Environmental and Remote Sensing Center in Bergen, Norway was appointed ”Visiting Professor for Senior International Scientists of the Chinese Academy of Sciences (CAS)” for 2010. The diploma, signed by Prof. Lu Yongxiang, President of the Chinese Academy of Sciences, was presented to him by Prof. Hui-Jun Wang, Director for ”Institute of Atmospheric Physics of CAS” in Beijing on Tuesday October 26th. Prof. Johannessen delivered then his first guest lecture titled ”Arctic climate, present and future perspectives”.

Administrasjonssjef stilling ledig ved Nansensenteret

Nansensenteret søker en administrasjonssjef som skal ha ansvar for senterets administrative funksjoner, kontraktsoppfølging og personalforvaltning. Stillingen inngår i senterets ledergruppe og rapporterer til direktør.

Vi søker etter en person med ledererfaring og relevant høyere utdannelse.

Doctor of Science dissertation at NIERSC

On September 30 Dr. Vitaly Alexandrov at Nansen Environmental and Remote Sensing Centre (NIERSC) in St. Petersburg successfully defended his Doctor of Sciences thesis in Oceanography. The title of his thesis is "Satellite radar monitoring of the Arctic sea ice".

The defense was carried out at the Scientific Council of Arctic and Antarctic Research Institute, headed by Dr. I. Frolov. The official opponents were Professor G.A. Lebedev (AARI), Professor V.I. Binenko (Center of Ecological Safety of RAS/State Russian Hydrometeorological University), and Professor A.V.

Minister of research and higher education visited the Nansen Center

The Norwegian Minister of research and higher education Tora Aasland visited the Nansen Center to day after she had opened “Forskningsdagene” here in Bergen.

Prof. Ola M. Johannessen informed the Minister about new research results and observations on studies of the Greenland ice sheet melting and accumulation.

Minimum sea ice extent in the Arctic now

In the middle of September every year the minimum sea ice extent appears in the Arctic Ocean – so also this year. Both the Northeast- and Northwest- passages are ice free and open for ship traffic. According to the ArcticROOS analysis of satellite microwave data the minimum sea ice area occurred on September 8th 2010 with an ice area of 4.12 mill. km2 in the Arctic Ocean. The sea ice area was then 16% larger that the previous minimum observed in 2007.

The ice area during the 2010 minimum ice extent in the Arctic Ocean (Figure 1) is 4.12 mill.

Vacant PhD position in satellite remote sensing of the cryosphere

A PhD position in satellite remote sensing of cryosphere is vacant at the Nansen Environmental and Remote Sensing Center, Bergen, Norway. The position will focus on development of methodology for use of CryoSat-2 radar altimeter data for Arctic land and sea ice studies. Furthermore, the PhD work will include analysis of CryoSat-2 data in combination with other satellite data such as SAR to study sea ice volume and fluxes in the Arctic. The PhD candidate will have opportunity to spend some of the time at the Nansen Center’s office in the Science Park in Longyearbyen.

Impact of anticyclonic eddies on the primary production in the Norwegian Sea.

In the September issue of Deep Sea Research Cecilie Hansen, E. Kvaleberg and Annette Samuelsen publish the paper “Anticyclonic eddies in the Norwegian Sea; their generation, evolution and impact on primary production”.

In the paper they use satellite radar altimetry and ocean color observations in combination with a coupled physical-primary production ocean model to investigate anticyclonic eddies at two locations in the Norwegian Sea. Of particular interest are the formation of the anticyclonic eddies, and their influence on primary production.

Unique oceanographic observations - "Jotun Arctic" on survey to East Greenland fjord

During the last three years the Nansen Center has collected unique oceanographic measurements in order to quantify the subsurface fjord melting of the Greenland Ice Sheet. New data were collected in the Sermilik Fjord (SF) and adjacent East Greenland shelf in August 2010 (see map). It was proposed that a submarine melting of a glacier’ ice fronts in Greenland as well as in Antarctica is an important mechanism driving recent curving front’s retreat and glaciers acceleration.

A new insight into localisation methods in ensemble Kalman filter systems

Pavel Sakov and Laurent Bertino conducted a comparative study of two non-adaptive localisation methods popular in operational oceanographic and atmospheric data assimilation systems: covariance localisation (CL) and local analysis (LA). Both methods are applied mainly on empirical basis, and the relation between them remains largely unknown.

The authors conclude that while CL and LA are essentially different methods, in practice they normally produce essentially similar results. Apart from this main conclusion, the study contains a number of interesting theoretical advances.

Five books published in the Nansen Center's Polar series

The Nansen Centers in Bergen and St. Petersburg have published result and knowledge obtained through a wide range of joint Norwegian and Russian scientific research projects starting in 1992 with the foundation of the Nansen International Environmental and Remote Sensing Centre (NIERSC) in St. Petersburg.

Several of these books have been published through Praxis Publishers, UK (http://www.praxis-publishing.co.uk/) and their cooperation with Springer (http://www.springer.com/). These books are covering topics related to environmental, climate and remote sensing topics.

Five books published in the Nansen Center´s Polar series

The Nansen Centers in Bergen and St. Petersburg have published result and knowledge obtained through a wide range of joint Norwegian and Russian scientific research projects starting in 1992 with the foundation of the Nansen International Environmental and Remote Sensing Centre (NIERSC) in St. Petersburg.

Several of these books have been published through Praxis Publishers, UK (http://www.praxis-publishing.co.uk/) and their cooperation with Springer (http://www.springer.com/).

Advanced underwater ocean monitoring system deployed in the Fram Strait

In the EU-funded ACOBAR project (Acoustic technology for observing the interior of the Arctic Ocean) an ocean monitoring system for acoustic tomography and navigation is under deployment in the Fram Strait. The system will consist of three acoustic transceivers in a triangle and a receiver array in the middle (see upper part of the Figure - A-B-C are transceivers, D is the receiver). This system will provide acoustic travel times for model validation, assimilation and temperature inversions along 6 tracks in the Fram Strait.

Advanced underwater ocean monitoring system deployed in the Fram Strait

In the EU-funded ACOBAR project (Acoustic technology for observing the interior of the Arctic Ocean) an ocean monitoring system for acoustic tomography and navigation is under deployment in the Fram Strait. The system will consist of three acoustic transceivers in a triangle and a receiver array in the middle (see upper part of the Figure - A-B-C are transceivers, D is the receiver). This system will provide acoustic travel times for model validation, assimilation and temperature inversions along 6 tracks in the Fram Strait.

The Petermann Ice Island (2010) is drifting

The Nansen Center continues to monitor faith of the 270 km2 “Petermann Ice Island (2010)” that broke off from the Petermann Glacier on northeast Greenland on August 5th.

According to the attached Landsat image the Petermann Ice Island (2010) has on August 15th drifted about 8.5 km out (north-westward) in the Petermann fjord.

See also initial news story from the Nansen Center:

Link to more info.

The Petermann Ice Island (2010) is drifting

The Nansen Center continues to monitor faith of the 270 km2 “Petermann Ice Island (2010)” that broke off from the Petermann Glacier on northeast Greenland on August 5th.

According to the attached Landsat image the Petermann Ice Island (2010) has on August 15th drifted about 8.5 km out (north-westward) in the Petermann fjord.

See also initial news story from the Nansen Center:

http://www.nersc.no/main/index2.php?display=moreinfo&news_id=322&display...

Professor Ola M. Johannessen utnevt til æresmedlem i Norges Tekniske Vitenskapsakademi

Professor Ola M. Johannessen er tildelt æresmedlemskap i Norges Tekniske Vitenskapsakademi, NTVA. Diplom og medlemskapsnål i gull overleveres ved årets NTVA Teknologiforum i Trondheim 10. september.
Johannessen tildeles æresmedlemskapet både for sin store innsats for norsk polarforskning, for sin rolle som aktiv forsker, gründer og organisator, for sitt brede internasjonale engasjement, og for sitt betydelige bidrag for å etablere NTVAs aktiviteter i Bergen.

NTVA begrunner utnevnelsen som følger: "Ola M. Johannessen er født 2 juli 1938.

The Petermann ice shelf breaks up - ice calving of 28 km from the Petermann floating ice shelf on Greenland, which was 70 km long

Background: The Petermann Glacier (81° N-61° W) extends out in the Petermann Fjord as a 70 km floating ice shelf. Petermann Glacier has a thickness of 900 m when it moves into the fjord thinning along its way out in the fjord with an average speed of 1 km per year to 40 m at the end of the ice shelf (ice front) of which 4 m is above the sea level. Petermann ice shelf is the longest floating ice shelf on the Northern hemisphere. Previous research (A.

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