North Temperate Lakes LTER: Physical Limnology of Primary Study Lakes 1981 - current

Parameters characterizing the physical limnology of the eleven primary lakes (Allequash, Big Muskellunge, Crystal, Sparkling, Trout, bog lakes 27-02 [Crystal Bog] and 12-15 [Trout Bog], Mendota, Monona, Wingra and Fish) are measured at one station in the deepest part of each lake at 0.25-m to 1-m depth intervals depending on the lake. Measured parameters in the data set include water temperature, vertical penetration of photosynthetically active radiation (PAR; not measured on lakes Mendota, Monona, Wingra, and Fish), dissolved oxygen, as well as the derived parameter percent oxygen saturation. Sampling Frequency: fortnightly during ice-free season - every 6 weeks during ice-covered season for the northern lakes. The southern lakes are similar except that sampling occurs monthly during the fall and typically only once during the winter (depending on ice conditions). Number of sites: 11

本数据集测定了11个主要湖泊的物理湖沼学（physical limnology）特征参数，涉及湖泊包括阿勒夸什湖（Allequash）、大马斯克尔隆格湖（Big Muskellunge）、水晶湖（Crystal）、斯帕克林湖（Sparkling）、特劳特湖（Trout）、27-02号泥炭湖[水晶沼泽湖（Crystal Bog）]与12-15号泥炭湖[鳟鱼沼泽湖（Trout Bog）]、门多塔湖（Mendota）、莫诺纳湖（Monona）、温格拉湖（Wingra）以及菲什湖（Fish）。每个湖泊的最深点位设置一个采样站，采样层位间隔依湖泊差异设为0.25米至1米。数据集涵盖的实测参数包括水温、光合有效辐射（photosynthetically active radiation, PAR）的垂直穿透特性（门多塔湖、莫诺纳湖、温格拉湖与菲什湖未开展PAR测量）、溶解氧，以及衍生计算得到的氧饱和度百分比参数。采样频率规则为：北部湖区无冰期每两周采样一次，封冰期每6周采样一次；南部湖区采样规则略有不同，秋季为每月采样一次，冬季通常仅采样一次（视冰情条件而定）。总采样位点数量为11个。