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), dissolved oxygen in mg/L and percent 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.
More information on NTL’s primary study lakes can be found at: https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-ntl&identifier=434.
Please consult NTL's website (https://lter.limnology.wisc.edu) for information on experimental lake manipulations and the Wisconsin DNR's website (https://dnr.wisconsin.gov/) for management activities.

本数据集针对11个主要湖泊的物理湖沼学（physical limnology）特征参数开展测量，涉及湖泊包括Allequash湖、Big Muskellunge湖、Crystal湖、Sparkling湖、Trout湖，以及沼泽湖27-02号〔水晶沼泽湖（Crystal Bog）〕和12-15号〔鳟鱼沼泽湖（Trout Bog）〕，另包含Mendota湖、Monona湖、Wingra湖与Fish湖。测量点位设置于各湖泊最深点处，采样水深间隔为0.25米至1米，具体间隔依湖泊实际情况调整。
数据集涵盖的实测参数包括水温、光合有效辐射（photosynthetically active radiation, PAR）的垂向穿透特性、以mg/L为单位的溶解氧浓度及其饱和度百分比。
采样频率：北部湖泊的无冰期每两周采样一次，冰封期每6周采样一次；南部湖泊采样规则大体一致，但秋季为每月采样一次，冬季通常仅采样一次（采样次数依冰况而定）。
采样点位数量：11个。
有关NTL核心研究湖泊的更多详细信息，可访问：https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-ntl&identifier=434。
如需了解湖泊实验调控相关信息，请访问NTL官方网站（https://lter.limnology.wisc.edu）；有关湖区管理活动的详情，请查阅威斯康星州自然资源部（Wisconsin DNR）官方网站（https://dnr.wisconsin.gov）。