کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6441258 | 1639071 | 2016 | 8 صفحه PDF | دانلود رایگان |
- The difference of Zn/Si records between continental shelf and slope could be attributed to the changes of Zn2+ via upwelling or circulation.
- Zn/Si proxy could be a signal of marine productivity on the continental shelf of Prydz Bay.
- The down core profile of Zn/Si records shows increased tendency of marine productivity during the recent century.
The Zn/Si records of diatom opal from Prydz Bay were investigated. The results show that the Zn/Si ratios range from 8 to 53 μmol molâ 1. The ratio from the continental slope is higher than those from the shelf. The difference in Zn/Si records could be attributed to the change of bioavailable Zn via the upwelling of Zn2 +-rich deep water or the influence of oceanic water on the slope. However, phytoplankton productivity influences Zn/Si records on the continental shelf. Increased productivity leads to elevated Zn-pumping, and eventually to higher Zn/Si ratio in diatom opal. In this case, it is suggested that Zn/Si proxy could be a signal of marine productivity on the continental shelf of Prydz Bay. The down core profile of Zn/Si records shows an increase in marine productivity over the last century.
Journal: Marine Geology - Volume 381, 1 November 2016, Pages 34-41