Silver in the subarctic northeast Pacific Ocean: Explaining the basin scale distribution of silver |
| |
| Authors: | Dennis Kramer Jay T Cullen James R Christian W Keith Johnson Thomas F Pedersen |
| |
| Institution: | 1. School of the Environment and Chemistry Department, Trent University, Peterborough, ON, Canada;2. Mediterranean Institute of Oceanography (MIO), UM110, CNRS, IRD, Université de Toulon, Aix-Marseille Université, Marseille, France;3. Division for Marine and Environmental Research, Ruder Bo?kovi? Institute, Zagreb, Croatia;4. LASEM-Toulon, Base Navale De Toulon, Toulon, France;1. Atmosphere and Ocean Research Institute, The University of Tokyo, Japan;2. Department of Oceanography, Pukyong National University, South Korea;3. Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Japan |
| |
| Abstract: | Five vertical profiles of silver (Ag) in the subarctic northeast Pacific are presented. Dissolved (< 0.2 μm) Ag concentrations within the surface mixed layer range from 6–25 pM, with the highest observed values at the most coastal site. Elevated Ag concentrations at this station are most likely attributable to the estuarine circulation in the Juan de Fuca Strait. One open-ocean station (P20) exhibited a strong surface Ag maximum. The station was located at the edge of a Haida eddy which raises the possibility that such eddies transport Ag seaward from the coastal zone. Ag concentrations in the deep waters ranged from 60–80 pM. These measurements are consistent with other recent Ag data collected in the Pacific. Ag profiles throughout the Pacific Ocean yield a strong positive correlation between Ag concentration and dissolved silicic acid concentration. However, Ag is depleted relative to silicic acid at intermediate depths where dissolved O2 concentrations are low, implying a possible removal of Ag from oxygen-depleted waters by scavenging and/or precipitation. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
