NERSC News Archive

"The Nansen Heritage. Science at the End of the World" - Exhibition in the A.S. Popovs Central Museum of Communications, St. Petersburg

An international touring exhibition “The Nansen Heritage. Science at the End of the World” on the occasion 150th anniversary of Fridtjof Nansen’s birthday in 2011 opened in the A.S. Popov’s Central Museum of Communications, St. Petersburg, on 6 April 2010. The exhibition is also a part of the 200th anniversary celebration of the University of Oslo.

Spreading of the radioactive leakage from Fukushima nuclear plant in Japan

The extraordinary earthquake that generated an extreme tsunami that struck Japan, has led to radioactive leaks into the sea from the Japanese Fukushima reactors. Dr. Yongqi Gao and Prof. Ola M. Johannessen at the Mohn Sverdrup Center at the Nansen Environmental and Remote Sensing Center in Bergen, Norway and Nansen-Zhu International Research Center (NZC, Beijing, China), used a numerical model to simulate the potential spread of radioactive waste into the sea from Fukushima reactors and among other things the spreading towards China.

TV2 news report; Ocean spreading of radioactivity from the Fukushima nuclear power plant

The Nansen Center has made model simulations of potential oceanic spreading of radioactivity in from the Fukushima nuclear power plant in Japan.

The simulations indicate a seven years time to cross the Pacific Ocean to the US coast.

Arven etter Nansen på Bryggen museum

I forbindelse med Nansen-Amundsen året er vandreutstillingen ”Arven etter Nansen - vitenskap ved verdens ende” på Bryggen Museum fra 18. januar til 25. februar. Utstillingen tar utgangspunkt i Nansens innsats for å sette nordområdet på den norske dagsorden gjennom vitenskapelige ekspedisjoner og avgjørende oppdagelser innenfor bl.a. moderne havforskning.

“Arven etter Nansen” er en nytenkende og leken utstilling om forskning i nordområdene før og nå, produsert i anledning Nansen-Amundsen-jubileet 2011.

Kronikk i BT om Luftkvaliteten i Bergen

Forskningsdirektør for G.C. Rieber klimainstitutt ved Nansensenteret Dr. Igor Esau har i en kronikk i Bergens Tidende demonstrert bruk av høyoppløselige atmosfæremodeller og nye målinger for å bedre kunnskapen om luftforurensingen i Bergen.

Nansensenterets modellverktøy vil med større nøyaktighet kunne benyttes til å finne ut hvor og hvor stort forurensningen vil bli.

New paper by Dumont et al. in JGR: "A wave-based model for the marginal ice zone including a floe breaking parameterization. "

A simple but novel parameterization for floe breaking is derived by considering alternatively ice as a flexible and rigid material and by using current estimates of ice flexural critical strain and strength. This parameterization is combined with a wave scattering model in a one-dimensional numerical framework, to evaluate the floe size distribution and the extent of the MIZ.

New Paper by Keghouche et al in JGR: "Modeling dynamics and thermodynamics of icebergs in the Barents Sea from 1987 to 2005"

A modeling study of iceberg drift characteristics in the Barents and Kara seas for the period 1987–2005 is presented. Maps of iceberg density and potential locations subject to grounding complement sparse existing oceanographic and aerial field survey campaigns.

The model suggests preferential pathways from the most important calving sources. Icebergs originating from Franz Josef Land have the largest spread over the domain. Simulations confirm the previously observed seasonal cycle of the southernmost extent of the icebergs.

Air quality in Bergen during atmospheric blocking situations

Atmospheric conditions observed during late November and early December last year in Bergen are known as the atmospheric blocking. During days with blocking, easterly and north-easterly weak winds prevail. In Bergen, blocking situations have been frequently observed in January-February 2010 and return now in November. Blocking, as a meteorological phenomenon, causes large public resonance as its persistence over several days and even weeks deteriorate the air quality in some parts of the city.

Luftkvaliteten i Bergen

Høytrykkssituasjonen over sør Norge i slutten av november og begynnelsen av desember har gitt værforhold i de siste ukene som kalles atmosfærisk blokkering. Under slike atmosfæriske blokkeringer er det hovedsakelig østlig og nordøstlig svake vinder og derfor mye klart vær og den vanlige vestvinden med nedbør uteblir. Slike blokkeringer ble hyppig observert i januar-februar 2010 i Bergen og de kom tilbake igjen fra midten av november – kanskje litt uvanlig for denne årstiden.

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.