North Temperate Lakes LTER: Light Extinction 1981 - current
A light (PAR) extinction coefficient is calculated for the water column for the eleven primary lakes (Allequash, Big Muskellunge, Crystal, Sparkling, and Trout lakes, unnamed lakes 27-02 [Crystal Bog] and 12-15 [Trout Bog], Mendota, Monona, Wingra, and Fish) and two additional lakes near Madison, Wisconsin (Waubesa and Kegonsa). Data exists only for the Trout Lake-area lakes through 2018. Beginning in 2019, the Madison-area lakes were added. The fraction of surface light is computed at 0.25-m to 1-m depth intervals depending on the lake. The light (PAR) extinction coefficient is calculated by regressing ln(fraction of light(z)) on depth z. Sampling Frequency: fortnightly during ice-free season - every 6 weeks during ice-covered season Number of sites: 13
Data Citation SuggestionMagnuson, J.J., S.R. Carpenter, and E.H. Stanley. 2023. North Temperate Lakes LTER: Light Extinction 1981 - current ver 18. Environmental Data Initiative. https://doi.org/10.6073/pasta/9b27a778ac7b8c894ecded9d21c07da5. Accessed 2023-06-02.