General principles Eddy covariance
physical meaning of eddy covariance method
at 1 physical point on tower, @ time1, eddy1 moves parcel of air c1 down @ speed w1. then, @ time2, eddy2 moves parcel c2 @ speed w2. each parcel has gas concentration, pressure, temperature, , humidity. if these factors, along speed known, can determine flux. example, if 1 knew how many molecules of water went down eddies @ time 1, , how many molecules went eddies @ time2, @ same point, 1 calculate vertical flux of water @ point on time. so, vertical flux can presented covariance of vertical wind velocity , concentration of entity of interest.
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