scholarly journals THE IMPACT OF TYPHOONS ON THE CONTENT OF DIATOMS IN SEDIMENTS FROM AMUR BAY (SEA OF JAPAN) OVER THE LAST 150 YEARS

Author(s):  
I.A. Prushkovskaya ◽  
Keyword(s):  
Amur Bay ◽  
Author(s):  
Irina A. Prushkovskaya ◽  
Ira B. Tsoy

The study of diatoms in the sediments of the Amur Bay (Sea of Japan), formed over the last 2000 years, showed that the sharp short-term drops in the concentration of diatoms coincide with the minima of bromine content, which can be explained by the influence of typhoons or other catastrophic events leading to floods and used later in paleoreconstructions.


2011 ◽  
Vol 4 ◽  
pp. ASWR.S6551
Author(s):  
Khandakar Habib Al Razi ◽  
Moritomi Hiroshi ◽  
Kambara Shinji

In Japan, mercury and its compounds were categorized as hazardous air pollutants in 1996 and are on the list of “Substances Requiring Priority Action” published by the Central Environmental Council of Japan. The Air Quality Management Division of the Environmental Bureau, Ministry of the Environment, Japan, selected the current annual mean environmental air quality standard for mercury and its compounds of 0.04 μg/m3. Long-term exposure to mercury and its compounds can have a carcinogenic effect, inducing eg, Minamata disease. This study evaluates the impact of mercury emissions on air quality in the coastal area of the Sea of Japan. Average yearly emission of mercury from an elevated point source in this area with background concentration and one-year meteorological data were used to predict the ground level concentration of mercury. The annual mean concentration distribution of mercury and its compounds were calculated for the middle part of Honshu Island, which served as a background level of mercury concentration for the coastal are of the Sea of Japan. To estimate the concentration of mercury and its compounds in air of the local area, two different simulation models have been used. The first is the National Institute of Advanced Science and Technology Atmospheric Dispersion Model for Exposure and Risk Assessment (AIST-ADMER) that estimates regional atmospheric concentration and distribution. The second is the Ministry of Economy, Trade and Industry Low Rise Industrial Source Dispersion Model (METI-LIS) that estimates the atmospheric concentration distribution in the vicinity of facilities.


2019 ◽  
Vol 46 (3) ◽  
pp. 432-442
Author(s):  
S. A. Cherkashin ◽  
M. V. Simokon’ ◽  
T. S. Pryazhevskaya

2015 ◽  
Vol 53 (8) ◽  
pp. 726-734
Author(s):  
A. A. Mar’yash ◽  
N. D. Khodorenko ◽  
V. I. Zvalinskii ◽  
P. Ya. Tishchenko

2019 ◽  
Vol 46 (2) ◽  
pp. 172-177
Author(s):  
D. M. Polyakov ◽  
A. A. Maryash ◽  
A. V. Mozherovsky

The average content of the elements Fe, Mn, Zn, Pb, Cu, Cr, V, Co, Cd, Ni, As, and Mo in the subcolloidal fraction of bottom sediments in the northern and central parts of the Amur Bay (in Russia) was determined. An increase of 5–17% in the content of the metals Pb, Co, Ni, Zn, Cr, V, and As in bottom sediments affected directly by the Razdolnaya River was determined and was found to be associated with sorption on Fe and Mn oxyhydroxides. An increase of 21–55% in the content of the metals Cu and Mo and of the metalloid As compared to their average content in the bottom sediments of the bay was found to be associated with the accumulation by humic substances.


2003 ◽  
Vol 5 (2) ◽  
pp. 82-95 ◽  
Author(s):  
A. A. Begun ◽  
T. Yu. Orlova ◽  
A. Yu. Zvyagintsev

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