Tungsten-181 and Other Short Lived Fission Products in Ground Level Air in North Germany and North Norway

Nature ◽  
1971 ◽  
Vol 232 (5312) ◽  
pp. 552-553 ◽  
Author(s):  
W. KOLB
Keyword(s):  
Fission Products ◽  
Ground Level ◽  
North Germany ◽  
Ground Level Air ◽  
North Norway

Strontium-90, strontium-89, plutonium-239, and plutonium-238 concentrations in ground-level air, 1964-1969

1970 ◽  
Vol 4 (7) ◽  
pp. 598-602 ◽  
Author(s):  
Bernard Shleien ◽  
Joseph A. Cochran ◽  
Paul J. Magno
Keyword(s):  
Ground Level ◽  
Strontium 90 ◽  
Ground Level Air

Comparison of Beryllium-7 and Cæsium-137 Radioactivity in Ground-Level Air

Nature ◽  
1961 ◽  
Vol 191 (4787) ◽  
pp. 454-456 ◽  
Author(s):  
P. F. GUSTAFSON ◽  
M. A. KERRIGAN ◽  
S. S. BRAR
Keyword(s):  
Ground Level ◽  
Ground Level Air

Radionuclides in deposition in the Ignalina NPP region in 2005

Open Physics ◽  
2006 ◽  
Vol 4 (4) ◽  
Author(s):  
Rimvydas Jasiulionis ◽  
Andrej Rožkov
Keyword(s):  
Nuclear Power ◽  
Particle Deposition ◽  
Activity Concentration ◽  
Ground Level ◽  
137Cs Activity ◽  
Hysplit Model ◽  
Solubility In Water ◽  
137Cs Activity Concentration ◽  
Chernobyl Npp ◽  
Ground Level Air

AbstractResults of radionuclide activity concentration measurements in deposition and ground-level air conducted at the station of the Institute of Physics situated 3.5 km from the Ignalina Nuclear Power Plant (Ignalina NPP) in 2005 are analyzed. Atmospheric depositional fluxes of 7Be, 60Co and 137Cs are estimated. Radionuclide particle deposition rates are calculated. The Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) model of the global dispersion and deposition is used to explain variations in the 137Cs activity concentration in the ground-level air in the Ignalina NPP region in 2005. An increase in the 137Cs activity concentration of up to 17.4 µBq m−3 on 30 October-5 November is studied. Modelling results show that the Chernobyl NPP Unit 4 Sarcophagus and the radiocaesium resuspension from the Chernobyl NPP accident polluted regions are sources of 137Cs to the environment of the Ignalina NPP. Results on solubility in water of aerosols — carriers of 137Cs — are discussed.

scholarly journals Uncertainties in assessing the environmental impact of amine emissions from a CO<sub>2</sub> capture plant

2014 ◽  
Vol 14 (16) ◽  
pp. 8533-8557 ◽  
Author(s):  
M. Karl ◽  
N. Castell ◽  
D. Simpson ◽  
S. Solberg ◽  
J. Starrfelt ◽  
...  
Keyword(s):  
Drinking Water ◽  
Environmental Impact ◽  
Lake Water ◽  
Ground Level ◽  
Model Framework ◽  
Study Region ◽  
Fugacity Model ◽  
Modelling Framework ◽  
Degradation Rates ◽  
Ground Level Air

Abstract. In this study, a new model framework that couples the atmospheric chemistry transport model system Weather Research and Forecasting–European Monitoring and Evaluation Programme (WRF-EMEP) and the multimedia fugacity level III model was used to assess the environmental impact of in-air amine emissions from post-combustion carbon dioxide capture. The modelling framework was applied to a typical carbon capture plant artificially placed at Mongstad, on the west coast of Norway. The study region is characterized by high precipitation amounts, relatively few sunshine hours, predominantly westerly winds from the North Atlantic and complex topography. Mongstad can be considered as moderately polluted due to refinery activities. WRF-EMEP enables a detailed treatment of amine chemistry in addition to atmospheric transport and deposition. Deposition fluxes of WRF-EMEP simulations were used as input to the fugacity model in order to derive concentrations of nitramines and nitrosamine in lake water. Predicted concentrations of nitramines and nitrosamines in ground-level air and drinking water were found to be highly sensitive to the description of amine chemistry, especially of the night-time chemistry with the nitrate (NO3) radical. Sensitivity analysis of the fugacity model indicates that catchment characteristics and chemical degradation rates in soil and water are among the important factors controlling the fate of these compounds in lake water. The study shows that realistic emission of commonly used amines result in levels of the sum of nitrosamines and nitramines in ground-level air (0.6–10 pg m−3) and drinking water (0.04–0.25 ng L−1) below the current safety guideline for human health that is enforced by the Norwegian Environment Agency. The modelling framework developed in this study can be used to evaluate possible environmental impacts of emissions of amines from post-combustion capture in other regions of the world.

Langjährige Be7 -Bodenluftmessungen lassen Änderung des atmosphärischen Austauschverhaltens während der letzten Jahrzehnte vermuten

1996 ◽  
Vol 51 (10-11) ◽  
pp. 1139-1143 ◽  
Author(s):  
S. Hartwig
Keyword(s):  
Exchange Process ◽  
Ground Level ◽  
Eddy Diffusivity ◽  
Source Distribution ◽  
Air Concentration ◽  
Minimum Concentration ◽  
Exchange Processes ◽  
Yearly Maximum ◽  
Heat Source Distribution ◽  
Ground Level Air

Abstract An analysis covering three decades (1964-1994) of monthly Be7 ground-level-air concentration measurements at Braunschweig shows a systematic trend of the data. This trend is related to the yearly maximum/minimum concentration ratio. The observation may be due to a continuous mitigation of exchange processes between stratosphere and troposphere. This finding is commensurate with the hypothesis that, due to the growing concentration of anthropogenic infrared active gases, the heat source distribution in the stratosphere and consequently the eddy diffusivity and exchange process between stratosphere and troposphere are altered. This results in a shorter irradiation period of stratospheric air portions by cosmic rays and consequently can lower the concentration of isotopes of stratospheric origin in ground level air.

The Concentration of Contaminant Alkali Salts in Ground Level Air

Science ◽  
1953 ◽  
Vol 118 (3073) ◽  
pp. 612-614 ◽  
Author(s):  
R. M. Moyerman ◽  
K. E. Shuler
Keyword(s):  
Ground Level ◽  
Alkali Salts ◽  
Ground Level Air

scholarly journals Further Evidence of Changing Stability of the Atmosphere

Radiocarbon ◽  
1995 ◽  
Vol 37 (3) ◽  
pp. 961-962 ◽  
Author(s):  
Sylvius Hartwig
Keyword(s):  
Seasonal Pattern ◽  
Ground Level ◽  
Ozone Layer ◽  
Heat Sources ◽  
Exchange Processes ◽  
Long Term Measurement ◽  
Ground Level Air

In a recent paper (Hartwig, ms.) I have shown that it is possible to understand and discuss the changing Austausch (i.e., exchange of air parcels between different atmospheric layers) between the stratosphere and troposphere by means of long-term measurement of series of spallation products. It is well known (Friend 1961; Müh et al. 1966; Hartwig et al. 1969) that there is a seasonal pattern in the 7Be concentration of ground-level air with a maximum during May–June. This maximum is caused by enhanced exchange processes between the atmospheric compartments of the stratosphere and troposphere during this interval. Generally, those exchange processes are a consequence of stability and dynamics of the atmospheric compartments, which themselves result from, among other factors, the distribution of the heat sources in those compartments, namely the ground and the ozone layer.

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