Thermal conductivity data for Ivotuk and Council.

Jason Beringer
Sites :Ivotuk (MAT, MNT, Moss and shrub site) AND Council (Tundra, Forest, 
Shrub, Lowshrub and Woodland)

The thermal soil properties  (thermal conductivity, thermal diffusivity and 
heat capacity) were measured for each ATLAS site in Ivotuk and Council.  For 
each site soil samples were taken randomly within the 100x100m site grid 
using a 20cm diameter soil corer.  Samples were taken to a depth of 
approximately 10cm below mineral soil.  Five samples from each site were 
collected and placed in garbage bags and kept cool until laboratory analysis 
could be undertaken.

Lab analysis of the cores was undertaken using Thermal Logic probes that 
employs a heat pulse method.   In general five replicates were taken for each 
site.

An Excel spreadsheet contains all the raw field data "field TC results.xls" 
and a summary file including means and standard errors is also provided 
"TC summary.xls". Graphs of the summary are given in the files 
atlas_tc_means.gif and atlas_tc_means_5-1-cm.gif.  

Variables are as follows:
Sample – number
Area – council or ivotuk
Site – name of grid
SHFP – number of soil heat flux plate the soil sample was 
associated with
Cond 1 – Thermal conductivity (J.s-1.m-1.K-1)
Diff1 – Thermal diffusivity (m2.s-1 x 10^-6)
Heatcap1 – Volumetric heat capacity (J.m-3.K-1 x 10^-6)
Constant – model equation constant
Chisq1 – goodness of fit of data to modelled curve



Bristow, K.L., G.S. Campbell, and L. Calissendorff, Test of a 
heat-pulse probe 
for measuring changes in soil water content, Soil Science Society 
America 
Journal, 57, 930-934, 1993.
Kluitenberg, G.L., J.M. Ham, and K.L. Bristow, Error analysis of 
the heat pulse 
method for measuring soil volumetric heat capacity, Soil Science 
Society 
America Journal, 57, 1444-1451, 1993.