Boundary Layer Notes 5. Observational Techniques. Observational Techniques. Sources: Kaimal & Finnegan, Atmospheric Boundary Layer Flows: their structure and measurement, Oxford University Press, 1994 In situ techniques: Important boundary layer measurements:
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Sources: Kaimal & Finnegan, Atmospheric Boundary Layer Flows: their structure and measurement, Oxford University Press, 1994
T, u, v, w, q, trace gases (e.g. CO2, CH4)
We need to measure both mean quantities and fluctuations.
Derive speed of sound:
Sketch anemometer layout, and derive:
A bunch of sonic anemometers from
Applied Technologies. Data rates range from 10/s to 1/s.f
Li-Cor (brand) IR absorbtion Gas Analyzers.
Funny-looking one is an open cell, for eddy-correlation measurements.