IH - Instituto Hidrográfico, Rua das Trinas, 49, 1249-093 Lisboa, Portugal.
Mar Pollut Bull. 2012 Sep;64(9):1884-94. doi: 10.1016/j.marpolbul.2012.06.015. Epub 2012 Jul 5.
This study provides data concerning the hydrography and water chemistry of the Atlantic region between 29-38° N and 27-31° W, and establishes background values for dissolved Cu, Cd, Pb and As. Three water masses were identified: the Eastern North Atlantic Central Water (ENACW), the Mediterranean Water (MW) and the North Atlantic Deep Water (NADW). The ENACW exhibits a clear meridional gradient of temperature and salinity, with comparatively high values at the southern sites and lower values on the Azores platform. The ENACW, which includes the euphotic zone, also had comparatively high concentrations of oxygen and lower concentrations of nutrients and metals. The Cu, Cd and Pb results suggest that new background concentrations for OSPAR Region V (the Wider Atlantic) should be established as follows: 0.15-13 nM for Cu, 0.05-1.4 nM for Cd and 0.03-5 nM for Pb. The background concentrations of As for OSPAR Region V should be 7-28 nM.
本研究提供了 29-38°N 和 27-31°W 之间的大西洋地区的水文学和水化学数据，并确定了溶解态 Cu、Cd、Pb 和 As 的背景值。确定了三种水团：东北大西洋中心水（ENACW）、地中海水（MW）和北大西洋深层水（NADW）。ENACW 表现出明显的温度和盐度纬向梯度，南部站位的数值较高，亚速尔群岛平台的数值较低。包括透光带在内的 ENACW，其氧浓度也相对较高，营养物质和金属浓度较低。Cu、Cd 和 Pb 的结果表明，应建立 OSPAR 区域五（更广阔的大西洋）的新背景浓度如下：Cu 为 0.15-13 nM，Cd 为 0.05-1.4 nM，Pb 为 0.03-5 nM。OSPAR 区域五的 As 背景浓度应为 7-28 nM。
