Berkeley ESPM C129 - Lecture 13, Temperature and Thermodynamics, part III (13 pages)

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Lecture 13, Temperature and Thermodynamics, part III



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Lecture 13, Temperature and Thermodynamics, part III

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Pages:
13
School:
University of California, Berkeley
Course:
Espm C129 - Biometeorology
Biometeorology Documents

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9 26 2012 Lecture 13 Temperature and Thermodynamics part III Temperature and the Canopy Microclimate Thermal Indices Agriculture and Microclimates ESPM 129 Biometeorology 1 Summer Diurnal Pattern Air Temperature over Wheat 24 wheat Boardman OR 22 20 Air Temperature Diurnal and Annual Patterns Vertical Profiles 18 16 14 12 10 8 0 500 1000 1500 2000 Time ESPM 129 Biometeorology 2 1 9 26 2012 Mean Annual Diurnal Pattern at Two Contrasting Sites 24 22 20 oak savanna annual grassland 16 14 12 10 8 4 8 12 16 20 24 Hour ESPM 129 Biometeorology 3 Mean Diurnal Patterns by Season Winter NDJ 10 8 10 6 10 4 Tair C 0 grassland savanna 10 2 10 0 9 8 9 6 0 4 8 12 16 20 24 Hour Summer JJA 35 30 grassland savanna 25 Tair C Tair C 18 20 15 10 0 4 8 12 16 20 24 Hour ESPM 129 Biometeorology 4 2 9 26 2012 Temperature Amplitude and Soil Moisture Deficits Grassland 30 Tmax Tmin C 25 20 15 10 5 0 0 05 0 10 0 15 0 20 0 25 3 0 30 3 cm cm ESPMSoil 129 Moisture Biometeorology 0 35 5 Effects of Land Use on Temperature daily averaged Potential Temperature C 30 grassland Savanna 25 20 15 10 5 0 0 50 100 150 200 250 300 350 Day Baldocchi and Ma unpublished ESPM 129 Biometeorology 6 3 9 26 2012 Who is Warmer Cooler Depends on Season Roughness Energy Balance and Physiological Status potential temperature difference Oak Savanna Annual Grassland C 3 2 1 0 1 2 0 50 100 150 200 250 300 350 Day Baldocchi and Ma unpublished ESPM 129 Biometeorology 7 Differences in Mean Annual Air Temperature Open Land minus Forest Forests can be Darker Absorb More Energy and thereby be Warmer than Nearby Grasslands ESPM 129 Biometeorology 8 Lee et al 2011 Nature 4 9 26 2012 Profiles of Air and Potential Temperature June 1 1999 1800 UT Oak Ridge TN 700 Virtual Potential Temperature Dry Bulb Temperature 750 Stable Pressure mb 800 850 neutral 900 unstable 950 1000 280 290 300 310 320 ESPM 129 Biometeorology Aspen data of TA Black et al 50 Height m 40 30 midnight midday D210 20 10 0 11 12 13 14 15 16 17 18 19 Temperature C



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