Variations of 129I in the atmospheric fallout of Tokyo, Japan: 1963–2003

2012 ◽  
Vol 113 ◽  
pp. 116-122 ◽  
Author(s):  
Chiaki Toyama ◽  
Yasuyuki Muramatsu ◽  
Yuka Uchida ◽  
Yasuhito Igarashi ◽  
Michio Aoyama ◽  
...  
Keyword(s):  
Atmospheric Fallout

Sedimentation of Pb-210 in Laurentian Shield Lakes

1984 ◽  
Vol 19 (2) ◽  
pp. 97-109 ◽  
Author(s):  
R.J. Cornett ◽  
L. Chant ◽  
D. Link
Keyword(s):  
Lake Sediments ◽  
Water Column ◽  
Rate Constant ◽  
Bottom Sediments ◽  
Atmospheric Fallout ◽  
Small Lakes ◽  
Fractional Rate ◽  
Total Input ◽  
Shield Lakes ◽  
Annual Flux

Abstract The average annual flux of Pb-210 from the atmosphere to lake surfaces and to the bottom sediments was measured in seven small lakes located on the Laurentian Shield. Direct atmospheric fallout of Pb-210 was 136 ± 16 Bq m-2 a-1 Streams from the lakes' catchments input an additional 5 to 473 Bq m-2 a-1. Only 16 to 80 percent of the total input was found in the lake sediments. The fractional rate constant for Pb-210 sedimentation from the water column ranged from 0.25 to 5.3 per annum.

Atmospheric fallout of radionuclides in peat bogs in the Western Segment of the Russian Arctic

2021 ◽  
Author(s):  
Evgeny Yakovlev ◽  
Ruslan Spirov ◽  
Sergey Druzhinin ◽  
Alina Ocheretenko ◽  
Anna Druzhinina ◽  
...  
Keyword(s):  
Peat Bogs ◽  
Russian Arctic ◽  
Atmospheric Fallout ◽  
Western Segment

7Be activity variation in atmospheric fallout and weather factors in 2004–2005 in Samarkand

Atomic Energy ◽  
2007 ◽  
Vol 102 (5) ◽  
pp. 402-405 ◽  
Author(s):  
A. N. Azimov ◽  
F. R. Kungurov ◽  
A. K. Mukhamedov ◽  
A. N. Safarov ◽  
I. T. Muminov
Keyword(s):  
Atmospheric Fallout ◽  
Weather Factors ◽  
Activity Variation

Sulfur isotopic view on the sources of sulfur in atmospheric fallout along the coast of the Sea of Japan

1997 ◽  
Vol 31 (9) ◽  
pp. 1339-1348 ◽  
Author(s):  
Tsuyoshi Ohizumi ◽  
Norio Fukuzaki ◽  
Minoru Kusakabe
Keyword(s):  
Sea Of Japan ◽  
The Sea Of Japan ◽  
Atmospheric Fallout

Polycyclic Aromatic Hydrocarbons and Mercury in Sediments from Two Isolated Lakes in Central and Northern Canada

1993 ◽  
Vol 28 (8-9) ◽  
pp. 43-52 ◽  
Author(s):  
W. L. Lockhart ◽  
P. Wilkinson ◽  
B. N. Billeck ◽  
G. J. Brunskill ◽  
R. V. Hunt ◽  
...  
Keyword(s):  
Sediment Cores ◽  
Hudson Bay ◽  
Atmospheric Fallout ◽  
Long Period ◽  
The North ◽  
Northwestern Ontario ◽  
Forest Region ◽  
Rate Of Increase ◽  
Polycyclic Aromatic ◽  
Recent Sediments

Sediment cores were taken from two isolated Canadian lakes, a southern lake in the boreal forest region of northwestern Ontario and a northern one in the tundra on the west coast of Hudson Bay, for the purpose of comparing current and historical loadings of several contaminants. There are no sources of anthropogenic contaminants within either basin, yet both lakes showed increases in polycyclic aromatic hydrocarbon and mercury in more recent sediments as compared with older, deeper sediments. We have interpreted these as indications of increased loadings as a result of atmospheric fallout. When compared on the basis of the sum of sixteen PAHs, both lakes showed peak inputs in the middle years of this century, followed by more recent declines; although current values still exceed those from deep slices. With respect to mercury, the concentrations found in the southern lake were somewhat higher than those in the northern lake, and loadings were clearly greater in the south. Both lakes showed enrichment of mercury in top layers of the cores relative to bottom layers, and this enrichment was proportionately greater in the north. Both mercury profiles showed a slow rate of increase for a long period before 1850, suggesting influences from areas industrialized before North America. The northern lake also showed increases in PAH loadings prior to 1850, but the southern lake did not.

Atmospheric fallout of Sr90 in the environs of Leningrad

Atomic Energy ◽  
1961 ◽  
Vol 7 (5) ◽  
pp. 948-949
Author(s):  
V. P. Shvedov ◽  
M. I. Zhilkina ◽  
V. K. Zinov'eva ◽  
L. M. Ivanova ◽  
T. P. Makarova ◽  
...  
Keyword(s):  
Atmospheric Fallout

Storm water pollution modelling: first-order atmospheric dustfall processes that affect runoff quality

1986 ◽  
Vol 13 (1) ◽  
pp. 95-105 ◽  
Author(s):  
Boregowda Shivalingaiah ◽  
William James
Keyword(s):  
Water Quality ◽  
Meteorological Conditions ◽  
Storm Water ◽  
Water Runoff ◽  
Linear Regression Models ◽  
Atmospheric Fallout ◽  
Runoff Water ◽  
Industrial Areas ◽  
Storm Water Management Model ◽  
Storm Water Runoff

The buildup of surface pollutants has been shown to be a controlling factor in the quality of storm water runoff. In industrial areas particularly, atmospheric fallout is an important component of surface pollutant loadings. Storm water runoff models presently in use do not consider the physics of atmospheric dustfall.Industries, vehicle exhausts, and blowing of wind over unprotected surfaces all introduce pollutants to the atmosphere. Redistribution of this material on the ground depends on local topography and prevailing meteorological conditions. The location of the industrial areas; the direction, velocity, and duration of wind; total precipitation; and source concentrations are important parameters in the prediction of atmospheric dustfall. The paper describes the physical processes of atmospheric fallout that are relevant to water quality modelling. A new model, called ATMDST, to predict dustfall on individual subcatchments in a metropolitan area using prevailing meteorological conditions is developed based on statistical methods. Results from average, one-variable and two-variable linear regression models were statistically compared with observed data. Finally, ATMDST is interfaced with the storm water management model version 3 (SWMM3) to compute runoff water quality. The model is applied to Hamilton, Ontario. Key words: atmospheric dustfall, air pollution, urban runoff, water quality, pollutant buildup, environmental modelling.

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