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Microclimatological

Microclimatological. Instrumentation. Microclimatological Instrumentation. Trent Weather Station (Lafleur). Lethbridge Microclimate Station (Flanagan). Coulee Weather Station (1 of 6) (Letts). Cundinamarca, Colombia. Lakeview Ridge, Waterton Lakes National Park.

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Microclimatological

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  1. Microclimatological Instrumentation

  2. Microclimatological Instrumentation Trent Weather Station (Lafleur) Lethbridge Microclimate Station (Flanagan)

  3. Coulee Weather Station (1 of 6) (Letts)

  4. Cundinamarca, Colombia

  5. Lakeview Ridge, Waterton Lakes National Park

  6. Pearce Corners Cottonwood Grove

  7. Temperature Measurement • Thermocouple • 2 wires of different composition joined by an electrical source • Electrical resistance sensitive to temperature • Resistance is measured and coverted to temperature information • Thermister • The hotter it gets, the less power it lets through • Resistance is measured and converted to temperature information

  8. Stevenson Shield An earlier radiation shield often used with wet and dry bulb thermometers Photo: Trent Weather Station

  9. Temperature and Relative Humidity Temperature and RH sensors housed in Gill Radiation Shield Relative humidity sensor detects vapour adsorption onto a sulfonated polystyrene surface Temperature Sensor: thermister Function of Shields: Protect sensor from radiation (especially incoming shortwave and outgoing longwave radiation) while allowing air to pass.

  10. Krypton Hygrometer Source emits in the 121-122 nm range for which absorption by water vapour is strong and other gases do not absorb Detector senses amount of radiation received in this range Baseline established by conventional measurements

  11. Rainfall and Snowfall Measurements Precipitation Gauge with Nipher Shield

  12. Tipping Bucket Raingauge Cauca, Colombia Each ‘tip’ is logged by the datalogger

  13. Tipping Bucket Raingauge Mechanism

  14. ‘Old-fashioned’ raingauge Parque Munchique Cauca, Colombia

  15. Wind Speed and Direction Cup anemometer signal frequency converted to windspeed Wind vane

  16. Sonic anemometer Sound waves measure wind speed and temperature Time of flight for a sonic impulse to travel from a transmitting to a receiving transducer in both directions determines wind speed and direction Sonic Transducers

  17. Radiation Measurements Shields made of materials appropriate for desired wavelength (eg. polyethylene for net radiation – transparent to both longwave and shortwave energy) Millivolt signals are proportional to the radiation level Net radiometer

  18. Pyranometer Measures solar radiation on planar surface Pyrgeometer Measures infrared (longwave) radiation UV-B Radiometer Measures ultraviolet solar radiation on planar surface

  19. Heat Flux Plate Senses conductive heat transmission in the medium within which it is buried Used for soil energy balance studies Voltage proportional to heat flux through plate

  20. Base camp 2º30´25´´N, 77º00´02´´W, 1450 m Tambito al Cocal River Field Station Photo taken from microclimate station

  21. Juntas, El Tambo, Cauca, Colombia 901 m asl

  22. Downloading data from the datalogger…

  23. Ideally, this is how it’s supposed to look…

  24. Nice and organized ! Power Supplies EquipmentRack Closed Path IRGAS (CO2/H20 Analyzers) Calibration Equipment Data Acquisition Computer Source: Dr. Larry Flanagan

  25. “Leaf’ Wetness Sensor

  26. Leaf Wetness Data

  27. Photosynthesis Measurement Met stations often support ecological research projects

  28. Leaf Reflectance Measurement (NDVI, CI, PRI, WBI)

  29. Chlorophyll Fluorescence

  30. Stemflow Measurements (Rood) Scaling leaf-level gas- exchange to whole plant hydraulics in a riparian environment

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