NERSC News Archive

Opplæring i bruk av avansert satellitt teknologi for havovervåkning

Denne uken (29/9 til 2/10) er 65 doktorgradstudenter fra Europa, Russland og Brasil samlet på VilVite i Bergen for å lære om status og framtidige muligheter innen operative bruk av satellitt data for klima- og havovervåkning.

Den Europeiske Romfartsorganisasjonen (ESA) arrangerer intensiv kurs i Bergen og Nansen senter for miljø og fjernmåling og Geofysisk Institutt, UiB er vertskap. Kurset finner sted på VilVite senteret, hvor også bruk av satellittovervåkning inngår som en del av utstillingen.

Nansen Center contributes significantly at OceanObs´09

The OceanObs conference in 1999 played a major role in forming the foundation for the comprehensive ocean observing systems implemented during the last decade facilitating systematic information about the physical environment of the worldwide oceans. The outcome of OceanObs´09 is between other manifested through the global availability of the Argo float system and extensive global efforts in ocean observation systems. This week OceanObs´09 gathers again in Venice to celebrate the last 10 years achievements and to lay the way forward in operational ocean observing systems.

Arctic sea ice minimum in 2009 reach on September 12th.

The total ice area in the Arctic reached its 2009 minimum on September 12 with approximately 4.5 mill sq. km. This is approximately 10 days earlier and almost 1 mill sq km. more than the record minimum of 2007. Compared to the minimum of 2008, this year’s total ice area minimum is ca. 700,000 mill. sq. km. higher.

Although the total ice area in the Arctic has increased the last 2 years, this year’s minimum is still well below the average minimum of 1979-2006 by about 1.5 mill sq.

Investigations of the Greenland Ice Sheet freshwater discharges

A field expedition on board ‘Joturn Arctic’ into Sermilik Fjord on the southeast coast of Greenland was successfully completed on August 15th. Several outlet glaciers discharges freshwater into the fjord system, including one of the most rapid moving glaciers at Greenland - the Helheim glacier.

Real-time forecasts of the sea-ice in the Fram Strait

A high resolution model of Fram Strait (3.5 km) has been recently developed and is now running in a 3-day forecast mode since 14 August 2009. The model simulations provides forecasts of the ice edge locations, sea ice concentrations, ice velocity and ice thickness.

Open boundary conditions are provided by the TOPAZ3 model and atmospheric forcing by ECMWF. The main purpose of this effort, supported by TOTAL E&P, is to test and validate a sea ice dynamical model which include a parameterization of the particular dynamics of the marginal ice zone (MIZ).

Tomography buoys successfully recovered after one year in the Fram Strait

The DAMOCLES acoustic tomography moorings with source and receivers were successfully recovered today by Dr. Hanne Sagen, NERSC, and her team onboard RV Håkon Mosby.

The objective of this first acoustic tomography experiment in the Fram Strait is to develop new ocean observing systems for the Arctic Ocean.

Acoustic tomography data are used to estimate the mean temperature and current fields in the deep ocean. The Fram Strait experiment includes data from CTD sections, gliders and moored profilers.

Flere mulige oljesøl fra "Full City" observert ute i kyststrømmen

Det siste døgnet har to radarsatellitter kartlagt den norske kyststrømmen i Skagerrak. Flere større ansamlinger av olje som kan stamme fra havaristen ”Full City” er observert – hvorav noen er bekreftet av observasjoner fra Kystverktes overvåkningsfly.

Den Europeiske satellitten ”Envisat” har to ganger siste døgn kartlagt Skagerrak med sin radar mens den Kanadiske satellitten ”Radarsat” var over Skagerrak i dag morges.

Transpolar currents disappear in the Arctic Ocean under a doubling of CO2

1. Professor Ola M. Johannessen is leading a research group from the Nansen Centers in Bergen and St. Petersburg and Institute of Mathematical Machines and System Problems in Kiev, Ukraine which over several years have studied how radio nuclides such as Strontium (90Sr) and Cesium (137C) have spread and will spread in the future from Sellafield, atmospheric fallout from nuclear test bombings in the past and from sources in Russian Arctic areas. We have in press a 500 page book from this work spanning over a 10 years period which will be published by "SPRINGER" in the fall 2009.


Envisat kartlegger oljesølet fra "Full City" i Skagerrak

Den Europeiske miljøovervåkningssatellitten Envisat kartlegger utbredelsen av oljesøl i Skagerrak. Fortsatt er det en del olje ute i Skagerrak som kan drive inn mot land og ytterligere forurense Sørlandskysten.

Mindre enn 1,5 time etter at Envisat satellitten passerte over Skagerrak i formiddag hadde Nansen senter for miljø og fjernmåling i Bergen bearbeidet og analysert satellitt radarbildet fra Skagerrak. Bildet viser flere oljesøl langs Sørlandskysten, nær havaristedet og ute i åpen sjø i Skagerrak etter forliste av ”Full City” ved Langesund.

Annual Reports for 2008 from the Nansen Group

Our strategy of creating “small Nansen Centers” in several countries in a north-south direction seems so far to be a fruitful adventure. Many important papers dealing with ocean processes and climate issues have been published in international referee journals – including Science and Nature – and can be taken as a prove for this.

20th. Nansen Fellowship Ph.D. Candidate defended in St. Petersburg

Dr. Natalia Zakhvatkina has completed her studies on developing automatic routines for sea ice classification and monitoring using satellite radar sensors (SAR) in the Arctic Ocean. Her research has been completed under joint supervision from Arctic and Antarctic Research Institute (AARI) - Prof. Ivan E. Frolov and the Nansen Centers in St. Petersburg Dr. Vitaliy Yu. Alexandrov and Bergen - Prof. Ola M. Johannessen. She is the 20th Russian Nansen Fellowship Ph.D. candidate completing receiving a Doctoral degree in St.

Study on the impact of hurricane on phytoplankton community

Dr. Annette Samuelsen participated in a model study on the impact of a hurricane on the phytoplankton community, recently published in Geophysical Research Letter.

This was the first study to analyze phytoplankton and zooplankton community size structure during hurricane passage. A three‐dimensional biophysical model was used to assess ecosystem dynamics, plankton biomass, and plankton distribution in the Gulf of Mexico during Hurricane Katrina (2005).

The Nansen Center hosts summer school on ocean remote sensing

The 2nd Advanced Training on Ocean Remote Sensing is being organized by ESA in Bergen - Norway, from 28 September to 02 October 2009. The training course is hosted by the Nansen Environmental and Remote Sensing Center and takes place at the VilVite Science Centre in Bergen.

As an advanced training course, it is targeted to the European, ESA Member state and Canadian research and development community, in particular post-doc researchers as well as masters and PhD students.

The training course will focus on ocean remote sensing theory and applications.

Vacant Post-Doc position in Arctic Climatology

A Post-Doc position is open for a scientist in the research project Planetary Boundary Layer Feedback in the Earth’s Climate System (PBL-feedback) at the G.C. Rieber Climate Institute at the Nansen Environmental and Remote Sensing Center, Bergen, Norway.

Ocean Science publication on modeling of the Agulhas Current

The TOPAZ/HYCOM model system of the Nansen Center is implemented and in operations for the Indian and Southern Oceans. This model system has been applied for evaluating two numerical advection schemes for eddy-resolving modeling of the Agulhas Current. Bjorn Backberg, Laurent Bertino and Johnny A.

Unique survey of ocean climate may improve climate predictions

A new letter in Nature Geoscience provides a unique assessment of ocean circulation and climate variability, and thus adds to the basis for improved climate prediction.

A research team from the Nansen Environmental and Remote Sensing Center, and the Bjerknes Centre for Climate Research, both in Bergen, Norway, has studied observed anomalies in ocean climate, and identified the anomalies’ progression with the circulation of the Nordic Seas, and the Norwegian Sea in particular.

TOPAZ surface current forecasts used at ECMWF for wave forecasting.

The ECMWF has requested access to TOPAZ forecast of surface currents as input to their operational wave model. TOPAZ has been selected both for the quality of the results and for its large coverage from the Equator to the ice edge.
Think of TOPAZ when you go surfing this week-end!

Publication on sources and spreading of radionuclides in the North Atlantic and Arctic region

Yongqi Gao, Helge Drange, Ola M. Johannessen and Lasse H.

New Research Director appointed at The G.C. Rieber Climate Institute

Dr. Igor Esau is appointed the research director of the G.C. Rieber Climate Research Institute at the Nansen Centre.

Dr. Esau got his Diploma in meteorology with honors degree at Tomsk State University, Russia in 1992. He holds two Ph.D. degrees, respectively in mathematics and physics - with applications to climatology - from Institute for Numerical Mathematics, Russian Academy of Science, Moscow, Russia in 1996 and in meteorology - planetary boundary layer - from Department of Geosciences, University of Uppsala, Uppsala, Sweden obtained in 2003.

Ocean color algorithm published by the Nansen Centers in St. Petersburg and Bergen.

Anton Korosov, Dmitry Pozdnyakov and Lasse H. Pettersson and co -authors have published the paper "Semi-empirical Algorithm for the Retrieval of Ecology-Relevant Water Constituents in Various Aquatic Environments" in Algorithms - an Open-Access Journal of Computer Science, Theory, Methods and Interdisciplinary Applications, Data and Information Systems, Software Engineering, Artificial Intelligence, Automation and Control Systems.

The paper addresses an advanced operational semi-empirical algorithm for processing satellite remote sensing data in the visible region is described.

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