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Climate data for D1 data logger (CR21X) from 1986-10-13 to 2000-6-28, daily

Data set creator(s): Mark Losleben

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INSTAAR, University of Colorado
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Boulder, CO 80309-0450
(720) 369-3550

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Data Usage Summary
  • Data Use Policy

    1. Use our data freely. All Niwot LTER data products (except some recent data sets for which metadata but not data are available) are released to the public and may be freely copied, distributed, edited, remixed, and built upon under the condition that you provide acknowledgement as described below.

    2. Give proper acknowledgement. Publications, models and data products that make use of these data sets must include proper acknowledgement, including citing data sets in a similar way to citing a journal article. See The following acknowledgment should accompany any publication or citation of these data: Logistical support and/or data were provided by the NSF supported Niwot Ridge Long-Term Ecological Research project and the University of Colorado Mountain Research Station

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Climatological data were collected from a Niwot Ridge climate station (D1) throughout the year using a Campbell Instruments CR21X data logger. Maximum and minimum values are recorded instantaneously, with the sampling interval being 30 seconds. Daily means and totals are calculated from 2880 individual measurements. 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, and wind direction. Solar radiation CR21X measurements were discontinued 10 August 1993.


Study site was D1 (also known as Niwot and located on Niwot Ridge 2.6 km east of the Continental Divide). Original data are stored with the NWT LTER data manager and at the Mountain Research Station.

Date Range:

1986-10-13 to 2000-6-28




maximum temperature, time of maximum temperature, minimum temperature, time of minimum temperature, average temperature, maximum relative humidity, time of maximum relative humidity, minimum relative humidity, time of minimum relative humidity, average relative humidity, maximum barometric pressure, time of maximum barometric pressure, minimum barometric pressure, time of minimum barometric pressure, average barometric pressure, maximum wind speed, minimum wind speed, scalar average wind speed, vector average wind speed, average wind direction, standard deviation of wind direction, maximum solar radiation, time of maximum solar radiation, total solar radiation,

Location: D1 data logger (CR21X)

At a glance:

D1 site
Elevation: 3750 m


Location Group: D1

Found within: Niwot Ridge (USFS - UNESCO Biosphere Reserve)
Located in: USFS - UNESCO Biosphere Reserve
(Click to learn more about these locations)

More data from: D1

Core Data Set: No
Discipline: Climatology/meteorology

Data Citation

Losleben, Mark. 2018. Climate data for D1 data logger (CR21X) from 1986-10-13 to 2000-6-28, daily.

CU Boulder

This material is based upon work supported by the National Science Foundation under Cooperative Agreement #DEB-1637686. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necesarily reflect the views of the National Science Foundation.

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