High-frequency dissolved oxygen, water temperature, wind speed, and radiation data; stream and in-lake nutrient concentration data; and daily metabolism and nutrient loading estimates for 16 lakes in North America and Northern Europe.

In lakes, ecosystem structure and processes are influenced by gross primary production
(GPP), ecosystem respiration (R), and net ecosystem production (NEP). The rates of these
metabolic processes are often controlled by resource availability, which often reflects
catchment loads. Although the relationship between catchment loads and in-lake nutrient
concentrations may be well defined in specific lakes, we explored how watershed vs. in-lake
predictors of metabolism compare across lake types. To do this, we combined stream loads of
carbon (C), nitrogen (N), and phosphorus (P) with high frequency in situ monitoring of lake
metabolism and in-lake C, N, and P concentrations from 16 lakes spanning a range of
latitudes (39 to 64 degrees N), inflowing stream (0 - 6 streams), and trophic status
(oligotrophic to eutrophic). The data package includes high-frequency dissolved oxygen,
water temperature, wind speed, and solar radiation data as well as daily estimates of GPP,
R, and NEP derived from those data. In addition, the data package includes in-lake and
stream concentrations of dissolved organic carbon, total nitrogen, and total phosphorus and
stream discharge data. The package also includes estimates of daily carbon, nitrogen and
phosphorus loading to each lake derived from the stream concentrations and discharge.