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Monthly Lake Michigan Monitoring Program
Monitoring sites extend from the Milwaukee Harbor to a pelagic station 16 km offshore, and include a perch spawning reef and an urban water intake area. The suite of measurements includes temperature, water clarity, water chemistry, phytoplankton and zooplankton abundance, and bacterial and plankton productivity. Some of these measurements are made directly from the research vessel
Neeskay
while others are made in the WATER Institute laboratories.
The red dots on the map above mark the sampling locations for WATER Institute monthly monitoring data. Click a red dot or the station name from the table below (recommended for non-graphic browsers) to view CTD or Chemistry data for any individual station.
These sites are visited on a monthly basis including winter. At each site, a variety of
sampling techniques
are used to provide physical, chemical and biological properties.
Monitoring site measurements include:
CTD Profiles:
A conductivity - temperature - depth (CTD) profiler is used to measure water quality parameters at small depth intervals from the surface to the bottom. Parameters measured include water temperature, conductivity, pH, dissolved oxygen, redox potential, scalar irradiance, turbidity (water clarity), and algal fluorescence.
Chemical Profiles:
Water samples are collected from specific depths using Niskin sampling bottles that are lowered and raised on a sampling cable connected to a winch. Water samples are returned to the laboratory and analyzed for dissolved and particulate nutrients (carbon, nitrogen, phosphorus, silica), algal pigments, protein, and the major ions chloride and sulfate.
View field layouts and statistics for
CTD
and
Laboratory
measurements.
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