Distribution of dissolved and particulate forms of iron and manganese in the Black Sea
Yazarlar (3)
| Bildiri Türü | Tebliğ/Bildiri | Bildiri Dili | İngilizce |
| Bildiri Alt Türü | Tam Metin Olarak Yayınlanan Tebliğ (Uluslararası Kongre/Sempozyum) | ||
| Bildiri Niteliği | Alanında Hakemli Uluslararası Kongre/Sempozyum | ||
| Kongre Adı | Second International Conference on "Oceanography of the Eastern Mediterranean and Black Sea: Similarities and Differences of Two Interconnected Basins Similarities and differences of two interconnected basins | ||
| Kongre Tarihi | 14-10-2002 / 18-10-2002 | ||
| Basıldığı Ülke | Türkiye | Basıldığı Şehir | Ankara |
| UAK Araştırma Alanları |
Polimer Bilimi
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| Özet |
| The principal aim of this study is to examine the behavior of dissolved inorganic and particulate forms of manganese and iron compounds in the oxic/anoxic transition (suboxic) zone of the western cyclone and coastal margin of the Black Sea. The samples were collected from the stations visited during three cruises of RV/Bilim at July 2000, September 2000, July 2001 and RV/Knorr at July 2001 in the Black Sea. In addition, real time profiles of dissolved Mn and Fe(ll) were obtained using a continuous profiling system attached to a multi-channel auto-analyzer during the Knorr-2001 cruise. The present results and other related parameters have also been compared with the Knorr-88 data published previously (Murray, 1991, Murray and Izdar, 1989) in order to understand long-term stability of the vertical structures of these metals that are very sensitive to redox potential changes in the suboxic/anoxic interface zone of the Black Sea. In the western cyclone of the Black Sea, the onset of dissolved Mn (>0. 1 uM) profiles has been located at about (crp15.85 surface depth, very consistent with the Knorr-88 findings (Murray et al. 1995). At this boundary, the concentration of dissolved ox ygen (DO) drops below 5 uM but the nitrate ions (NO3") still exist at 1.5 - 2.0 pM levels whilst the dissolved reactive phosphate profile displays acoherent minimum (as low as 0.05 - 0.1 uM). Not unexpectedly, the onset of dissolved Fe(ll) (> 0.025 uM) profile commences at greater density surfaces, at = 15.90 depths, where the hydrogen sulphide still does not appear and the phosphate profile displays a coherent maximum. Thus, there exists a consistent shift between the … |
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