Water properties of Brownie Lake, MN and Canyon Lake, MI from 2015-2019

Depth profiles of water column chemical and physical properties were assessed with seasonal-scale frequency from two meromictic lakes in the upper Midwest, U.S.A. from 2015 to 2019. Brownie Lake in Minneapolis, MN and Canyon Lake in the Huron Mountains of MI both contain elevated hypolimnetic dissolved iron (i.e. “ferruginous”). Several parameters were routinely measured with deployable probes at meter or sub-meter resolution at the deepest location in each lake. Water samples were also collected for laboratory analysis.2015年至2019年，针对美国中西部北部的两座单环流湖（meromictic lake），以季节尺度的采样频率开展了水柱化学与物理性质的深度剖面测定。其中包括明尼苏达州明尼阿波利斯的布朗尼湖（Brownie Lake）与密歇根州休伦山脉的峡谷湖（Canyon Lake），两座湖泊均具有较高的湖下层溶解铁含量，即处于‘铁质化（ferruginous）’状态。两座湖泊的最深点位均通过可部署式原位传感器探头，以米级或亚米级分辨率对多项参数进行了常规测定，同时还同步采集了水样用于实验室分析。