High-frequency under-ice water temperature and dissolved oxygen at Lake Sunapee, New Hampshire, USA, 2014-2019

The Lake Sunapee Protective Association (LSPA) has been monitoring water quality in Lake Sunapee, New Hampshire, USA, since the 1980s. Beginning the winter of 2014-2015, the LSPA deployed a string of HOBO temperature sensors at a location near Loon Island (where their instrumented buoy is located during the summer months) for under-ice water temperature profile monitoring. A HOBO U26 dissolved oxygen sensor was added to this monitoring string during the winter of 2017-2018. All sensors record data in 15-minute intervals over the winter and are downloaded after ice-off. All data have been QAQC'd to remove obviously errant readings, highly suspicious readings, and artifacts of maintenance.