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Pregled bibliografske jedinice broj: 210575

Časopis

Autori: Franić, Zdenko
Naslov: Estimation of the Adriatic Sea water turnover time using fallout 90Sr as a radioactive tracer
( Estimation of the Adriatic Sea water turnover time using fallout 90Sr as a radioactive tracer )
Izvornik: Journal of marine systems (0924-7963) 57 (2005); 1-12
Vrsta rada: članak
Ključne riječi: Adriatic Sea; Model; Radioactivity; 90Sr; Sea water
( Adriatic Sea; Model; Radioactivity; 90Sr; Sea water )
Sažetak:
Systematic, long-term measurements, starting in 1963, of 90Sr activity concentrations in sea water have been performed at four locations (cities of Rovinj, Rijeka, Split and Dubrovnik) along the Croatian coast of the Adriatic Sea. In addition, fallout samples were collected in the city of Zadar. 90Sr activity concentrations are in good correlation with the fallout activity, the coefficient of correlation being 0.72. After the nuclear moratorium on atmospheric nuclear bomb tests in 1960s, 90Sr activity concentrations in sea water exponentially dropped from 14.8F2.4 Bq m_3 in 1963 to 2.0F0.3 Bq m_3 in 2003. In the same period, the total annual 90Sr land surface deposit in Zadar fell by three orders of magnitude, from 713.3 Bq m_2 in 1963 to 0.4 Bq m_2 in 2003. Using strontium sea water and fallout data, a mathematical model was developed to describe the rate of change of 90Sr activity concentrations in the Adriatic Sea water and estimate its mean residence time in the Adriatic. By fitting the experimental data to a theoretically predicted curve, the mean residence time of 90Sr in the Adriatic Sea water was estimated to be approximately 3.4F0.4 years, standard deviation being calculated by Monte Carlo simulations. As in physical oceanography 90Sr can be used as effective radioactive tracer of water mass transport, this value also reflects the upper limit for turnover time of the Adriatic Sea water. The turnover time of 3.4 years for the Adriatic Sea water is in reasonable agreement with the value which was estimated, by studying water flows through the Strait of Otranto, to be on the order of 1 year.
Projekt / tema: 0022001
Izvorni jezik: eng
Rad je indeksiran u
bazama podataka:
Current Contents Connect (CCC)
Scopus
SCI-EXP, SSCI i/ili A&HCI
Science Citation Index Expanded (SCI-EXP) (sastavni dio Web of Science Core Collectiona)
Kategorija: Znanstveni
Znanstvena područja:
Fizika
URL cjelovitog teksta:
Google Scholar: Estimation of the Adriatic Sea water turnover time using fallout 90Sr as a radioactive tracer



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