North Temperate Lakes LTER: High Frequency Water Temperature Data - Trout Lake Buoy 2004 - current

The instrumented buoy on Trout Lake is equipped with a thermistor chain that measures
water temperature from thermistors placed throughout the water column. Starting in 2005,
thermistors were placed every 0.5-1m from the surface through 14m and every 2 to 4m from 14m
to the bottom of the water column at 31m. In July 2006, a new thermistor chain was deployed
with thermistors placed every meter from the surface through a depth of 19 meters. The Trout
Lake buoy is also equipped with a dissolved oxygen sensor and meteorological sensors that
provide fundamental information on lake thermal structure, weather conditions, and lake
metabolism. Data are usually collected every 10 minutes with occasional periods of 2 minute
data for short periods to answer specific questions. After correcting for flux to or from
the atmosphere and vertical mixing within the water column, high frequency measurements of
dissolved gases such as carbon dioxide and oxygen can be used to estimate gross primary
productivity, respiration, and net ecosystem productivity, the basic components of whole
lake metabolism. Sampling Frequency: varies for instantaneous sample. averaged to hourly and
daily values from one minute samples Number of sites: 1 Data are averaged to daily values
from one minute samples for years 2005 - 2006. Daily values are computed from high
resolution data starting in year 2007. Data are averaged to hourly values from one minute
samples for years 2005 - 2008, Hourly values are computed from high resolution data starting
in year 2009. Hourly and daily values may not be current with high resolution data in the
current year.