Results 1 - 10 of 509
Results 1 - 10 of 509. Search took: 0.021 seconds
|Sort by: date | relevance|
[en] The mean 137Cs activity concentration in 278 liver samples of moose (Alces alces) from 16 municipalities located in different parts of Norway varied within the range 43-752 Bq kg-1 among the municipalities. In general the geographical variation corresponded to the fallout pattern produced by the Chernobyl accident. In three communities in the southernmost part of the country however the transfer factor, defined as the activity in moose liver divided by the corresponding level in surface soil, was 6.5 times higher on average than elsewhere in Norway. Possible reasons for this highly significant difference are discussed, and it is hypothesized that the apparently much higher plant uptake in the south may be related to extensive soil acidification in this area from transboundary pollution.
[en] This note illuminates the status and some elements in the Russian efforts on use of nuclear power, with special emphasis on northwest Russia. In addition the report describes an evaluation of the possibilities of Norwegian influence on the nuclear power in northwest Russia and Kola Peninsula
[en] The changes in the climate due to emissions caused by humans, is only just beginning to show. For Norway are the changes in precipitation and run-off systems the most important. It is important to start preparations of that scenario now. This report analyses how to best prepare for these changes
[en] Complete text of publication follows. Observations of Polar Mesosphere Summer Echoes (PMSE) by the Resolute Bay VHF radar, located in Nunavut, Canada (75 deg N, 95 deg W), and by the ALWIN VHF radar, located in Andenes, Norway (69 deg N, 16 deg E) are characterized by differences of occurrence rate and PMSE strengths, with generally lower levels at Resolute Bay. Even though both radars are using calibrated observations, the role of the different radar hardware and antenna systems operated at both sites still represents a cause for concern in comparisons. Now, PMSE observations with identical radar hardware and identical analysis software are possible using the recently installed SKiYMET meteor radar at Eureka (80 deg N, 86 deg W) and the SKiYMET meteor radar at Andenes. Eureka is in the same longitudinal sector as Resolute Bay, but 5 degrees in latitude to the north. A 4-week measurement campaign was performed during July in 2008, with both the Andenes and Eureka meteor radars running in a special mode designed for PMSE studies. Both radars are calibrated using cosmic sky noise variations. In addition, the Andenes SKiYMET radar is also co-located with the ALWIN VHF radar in Andenes and may be used for the verification of results. Lower levels of PMSE strength were found at Eureka, confirming the earlier observations at Resolute Bay. The observations are discussed in relation to dynamics, thermal conditions, and ionization. Strong indications exist that the observed differences of PMSE strength are related to the different levels of ionisation due to precipitating particles in the auroral oval and inside the polar cap. Global maps of precipitating energetic electrons (energy band: 6.5 keV - 9.46 keV) and energetic protons (energy band 80 keV - 240 keV) derived from POES satellites clearly indicate that Eureka and Resolute Bay are always inside the polar cap where, under geomagnetically quiet conditions, ionisation due to particle precipitation is missing.