Climate data for C1 data logger (CR21X), 1986 - 2000.

Climatological data were collected from a Niwot Ridge climate station (C1) throughout the year using a Campbell Instruments CR21X data logger. Maximum and minimum values are recorded instantaneously, with the sampling interval being 30 seconds, until 28 January 1999 at which time the sampling interval was changed to 2 seconds. Daily averages and totals were calculated from 2880 individual measurements until 28 January 1999 and 43200 after that date. This instrument was programmed to generate both hourly and daily output. Parameters measured include solar radiation, air temperature, relative humidity, barometric pressure, wind speed, wind vector, wind direction, and UVB.