图2. 北太平洋(47°01′N,170°30′W)铜配体、总铜离子和自由铜离子浓度剖面(据参考文献[53]修改)
Fig.2. Profiles of ligand,total dissolved Cu and free Cu2+ for station in the North Pacific (47°01′N, 170°30′W,modified after reference [53])