TY  - JOUR
AU  - Weber, S.
AU  - Graf, A.
AU  - Heusinkveld, B. G.
TI  - Accuracy of soil heat flux plate measurements in coarse substrates - Field measurements versus a laboratory test
JO  - Theoretical and applied climatology
VL  - 89
SN  - 1434-4483
CY  - Wien [u.a.]
PB  - Springer
M1  - PreJuSER-56632
SP  - 109 - 114
PY  - 2007
N1  - Record converted from VDB: 12.11.2012
AB  - The in-situ performance of heat flux plates within coarse porous substrates might be limited due to poor contact between plate and substrate. We tested this behaviour with a simple laboratory set-up. Two test substrates were placed above a reference material of known thermal conductivity between a warm and a cold plate to establish a vertical heat flux. The temperature gradients and the response of a soil heat flux plate were measured. By means of the Fourier law of heat conduction the thermal conductivity of each test substrate was calculated, thus incorporating all heat transfer within the volume and representing the "effective" conductivity. The laboratory method had an accuracy of up to 7% (13% for a smaller set-up). In comparison, heat flux plate-derived heat fluxes showed errors of up to 26%. Use of heat flux plates in coarse substrates is not recommended without additional measurements.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000246845100010
DO  - DOI:10.1007/s00704-006-0256-2
UR  - https://juser.fz-juelich.de/record/56632
ER  -