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Soil Temperature Profiles Diurnal vertical heat transmission from solar inputs Follow downward heat pulses animation
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Soil T Exercise – Data 2 obs for each of 3 quadrants around shade tree Depth (cm) T( o C)010delta sunny morn, shady by midday (NE) 115.114.60.5 2 15.514.01.5 sunny all day (SE) 3 26.019.56.5 4 23.718.15.6 shady through midday (some sunspots) (NW) 516.413.62.8 616.013.32.7 Plot values – Can you explain the change with depth (delta = T vertical gradient) for each site, why these depth profiles differ among sites, and differences in surface temperatures at the surface across sites?
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Thermal conductivity as a function of soil density for loam at three moisture contents (MC) Why increasing, e.g., with compaction? Thermal conductivity is dependent on….?
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Soil thermal conductivity of clay loam as a function of organic matter content Why decreasing with OM?
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Soil thermal conductivity of clay loam as a function of concentrations of NaCl and CaCl2 solutions As salt concentration increases free water energy decreases thermal conductivity decreases
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Heat transmission from fire event VOC translocation Fire and thermal effects
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Redox oxidizing reducing effect of pH effect of water logging oxidizing reducing WET DRY reduced form oxidized form
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