Advances in heat‐pulse methods: Measuring soil water evaporation with sensible heat balance

2020 ◽  
Vol 84 (5) ◽  
pp. 1371-1375
Author(s):  
J.L. Heitman ◽  
X. Zhang ◽  
X. Xiao ◽  
T. Ren ◽  
R. Horton
Keyword(s):  
Soil Water ◽  
Heat Balance ◽  
Heat Pulse ◽  
Water Evaporation ◽  
Sensible Heat

Advances in Heat-Pulse Methods: Measuring Soil Water Evaporation with Sensible Heat Balance

2017 ◽  
Vol 2 (1) ◽  
pp. 0 ◽  
Author(s):  
J.L. Heitman ◽  
X. Zhang ◽  
X. Xiao ◽  
T. Ren ◽  
R. Horton
Keyword(s):  
Soil Water ◽  
Heat Balance ◽  
Heat Pulse ◽  
Water Evaporation ◽  
Sensible Heat

scholarly journals Sensible Heat Balance and Heat-Pulse Method Applicability to In Situ Soil-Water Evaporation

2013 ◽  
Vol 13 (1) ◽  
pp. vzj2012.0215 ◽  
Author(s):  
Andrew C. Trautz ◽  
Kathleen M. Smits ◽  
Paul Schulte ◽  
Tissa H. Illangasekare
Keyword(s):  
Soil Water ◽  
Heat Balance ◽  
Pulse Method ◽  
Heat Pulse ◽  
Water Evaporation ◽  
Sensible Heat

scholarly journals Sensible Heat Observations Reveal Soil-Water Evaporation Dynamics

2008 ◽  
Vol 9 (1) ◽  
pp. 165-171 ◽  
Author(s):  
J. L. Heitman ◽  
R. Horton ◽  
T. J. Sauer ◽  
T. M. DeSutter
Keyword(s):  
Heat Flux ◽  
Soil Water ◽  
Heat Balance ◽  
Measurement Techniques ◽  
Sensible Heat Flux ◽  
Soil Surface ◽  
Water Evaporation ◽  
Sensible Heat ◽  
Near Surface ◽  
Evaporation Zone

Abstract Soil-water evaporation is important at scales ranging from microbial ecology to large-scale climate. Yet routine measurements are unable to capture rapidly shifting near-surface soil heat and water processes involved in soil-water evaporation. The objective of this study was to determine the depth and location of the evaporation zone within soil. Three-needle heat-pulse sensors were used to monitor soil heat capacity, thermal conductivity, and temperature below a bare soil surface in central Iowa during natural wetting/drying cycles. Soil heat flux and changes in heat storage were calculated from these data to obtain a balance of sensible heat components. The residual from this balance, attributed to latent heat from water vaporization, provides an estimate of in situ soil-water evaporation. As the soil dried following rainfall, results show divergence in the soil sensible heat flux with depth. Divergence in the heat flux indicates the location of a heat sink associated with soil-water evaporation. Evaporation estimates from the sensible heat balance provide depth and time patterns consistent with observed soil-water depletion patterns. Immediately after rainfall, evaporation occurred near the soil surface. Within 6 days after rainfall, the evaporation zone proceeded > 13 mm into the soil profile. Evaporation rates at the 3-mm depth reached peak values > 0.25 mm h−1. Evaporation occurred simultaneously at multiple measured depth increments, but with time lag between peak evaporation rates for depths deeper below the soil surface. Implementation of finescale measurement techniques for the soil sensible heat balance provides a new opportunity to improve understanding of soil-water evaporation.

Sensible Heat Balance Measurements of Soil Water Evaporation beneath a Maize Canopy

2014 ◽  
Vol 78 (2) ◽  
pp. 361-368 ◽  
Author(s):  
X. Xiao ◽  
J.L. Heitman ◽  
T.J. Sauer ◽  
T. Ren ◽  
R. Horton
Keyword(s):  
Soil Water ◽  
Heat Balance ◽  
Water Evaporation ◽  
Sensible Heat

Measuring Subsurface Soil-Water Evaporation with an Improved Heat-Pulse Probe

2012 ◽  
Vol 76 (3) ◽  
pp. 876-879 ◽  
Author(s):  
Zhang Xiao ◽  
Sen Lu ◽  
Joshua Heitman ◽  
Robert Horton ◽  
Tusheng Ren
Keyword(s):  
Soil Water ◽  
Heat Pulse ◽  
Water Evaporation ◽  
Subsurface Soil ◽  
Pulse Probe

Laboratory Evaluation of the Dual-Probe Heat-Pulse Method for Measuring Soil Water Content

2003 ◽  
Vol 2 (3) ◽  
pp. 389
Author(s):  
J. M. Basinger ◽  
G. J. Kluitenberg ◽  
J. M. Ham ◽  
J. M. Frank ◽  
P. L. Barnes ◽  
...  
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Pulse Method ◽  
Heat Pulse ◽  
Laboratory Evaluation ◽  
Dual Probe
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