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The instrumented buoy on Lake Mendota is equipped with limnological and meteorological sensors that provide fundamental information on lake thermal structure, weather conditions, and lake metabolism. Data are collected every minute. Hourly and daily averages are derived from the high resolution (1 minute) data. Hourly and daily values may not be current with high resolution data as they are calculated at the end of the season. Meteorological sensors measure wind speed, wind direction, relative humidity, air temperature, and photosynthetically active radiation (PAR). Not all sensors are deployed each season. A list of sensors used since the first deployment in 2006 is provided as a downloadable CSV file. Number of sites: 1. Location lat/long: 43.0995, -89.4045 Notable events: 2017 - A boating mishap caused the loss of air temperature, relative humidity, and wind sensors between May 28 and July 11. The dissolved oxygen sensor had significant biofouling from algae and zebra mussels. 2019 - A YSI EXO2 sonde was added to the buoy and includes DO, chlorophyll, phycocyanin, specific conductance, pH, fDOM, and turbidity sensors. The chlorophyll and phycocyanin sensors replace Turner Cyclops 7 fluorometers that had been in use in prior years. Both sets of sensors output RFU, but have significant magnitude differences. The YSI pH, DO, and specific conductance sensors were cleaned and recalibrated every two weeks. 2020 - Cleaning and calibration of the YSI sensors occurred nearly every week. The dissolved CO2 sensor was not operating between July 2 and September 17. 2021 - Due to power and communications issues, the buoy was not operating August 22-31, and data is intermittent between November 8 and December 3. An effective method to keep the underwater PAR sensor mostly free of biofouling algae has been employed. 2022 - Buoy was not operating June 6-9 and July 2-5 due to power issues. Underwater PAR sensor unusable after October 1.
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Illilouette Creek Basin Distributed Air Temperature and Relative Humidity 2015-2021
These files contain air temperature and relative humidity in Illilouette Creek Basin, within different post-fire vegetation patches including a wetland, shrub field, and forest. Onset's HOBO U23 Pro V2 temperature and relatively humidity sensors were attached to trees and protected using white plastic radiation shields. Temperatures measured may be impacted by temperature of the tree trunks. These time series can be used to compare air temperature and humidity at different heights above the ground, different canopy covers, and different sides of trees. These data can also be compared to temperature and relative humidity at nearby meteorological stations. Most of these sensors were temporarily removed in order to protect them from the 2017 Empire Fire, but sensor #315 remained in place and shows elevated temperatures on October 16, 2017 due to the fire. See Metadata file for details of sensor locations.
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- Award ID(s):
- 2011346
- PAR ID:
- 10625344
- Publisher / Repository:
- Hydroshare
- Date Published:
- Format(s):
- Medium: X
- Location:
- Yosemite National Park
- Institution:
- Desert Research Institute
- Sponsoring Org:
- National Science Foundation
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