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Toolik Tussock


In 1990 a Campbell CR21x datalogger was installed in block 2 of the Toolik LTER experimental tussock plots. Located on a hillside near Toolik Lake ( 68 38' N, 149 36'W). Sensors were placed in a control, fertilized, greenhouse, greenhouse fertilized, shadehouse and shadehouse fertilized sites.

In each plot two strings (one in a tussock and one in a moss dominated area) of copper/copper-nickel thermocouple wires (TC) were installed at depths of 10, 20, and 40 cm. The following label codes were used: CT=control, GH = greenhouses, SH = shadehouses, F=fertilized, GF= greenhouse fertilized, SF = Shadehouse fertilized, with a suffix of 1 for Eriophorum vaginatum tussock or 2 for moss bed. All measurements are in degree Celsius. I All soil sensors were read every 15 minutes and averaged every 3 hours. During the winter months just daily soil values were stored.

In the control plot additional sensors include: global solar radiation, photosynthetically active radiation, unfrozen precipitation, and at 3 meters: air temperature, relative humidity, wind speed, and wind direction. In greenhouses and shade houses plots, air temperature, relative humidity and photosynthetically active radiation were also measured during the growing season. See Sensors for a detailed description of each sensor used. Each sensor is read every minute and averaged or totaled every hour.

Hourly data are in the files yyDLTUH.DAT, the three hourly data are in yyDLTUO.DAT, and daily summaries are in yyDLTUD.DAT, where yy is the year in which the data are collected. The original data is in file yyDLTDAT.ZIP which is archived at The Marine Biological Lab, Woods Hole, MA.


  • 1990-1999_MAT_HourlyWeather - Hourly weather and soil temperature data from the LTER Moist AcidicTussock Experimental plots. In 1990 a Campbell CR21x data logger was installed in block 2 of the Toolik LTER experimental moist acidic tussock plots. The plots are located on a hillside near Toolik Lake (68 38' N, 149 36'W). Sensors were placed in control, fertilized, greenhouse, greenhouse fertilized, shade house and shade house fertilized sites.

  • 2000-2010_MAT_HourlyWeather - Hourly weather and soil temperature data from the LTER Moist AcidicTussock Experimental plots. In 1990 a Campbell CR21x data logger was installed in block 2 of the Toolik LTER experimental moist acidic tussock plots. The plots are located on a hillside near Toolik Lake (68 38' N, 149 36'W). Sensors were placed in control, fertilized, greenhouse, greenhouse fertilized, shade house and shade house fertilized sites.

  • 2011-Present_MAT_HourlyWeather - Hourly weather and soil temperature data from the LTER Moist AcidicTussock Experimental plots. In 1990 a Campbell CR21x data logger was installed in block 2 of the Toolik LTER experimental moist acidic tussock plots. The plots are located on a hillside near Toolik Lake (68 38' N, 149 36'W). Sensors were placed in control, fertilized, greenhouse, greenhouse fertilized, shade house and shade house fertilized sites.

Please contact arc_im@mbl.edu with questions, comments, or for technical assistance regarding this web site.