WIT Press


The Detection Of Nonstationarity In The Determination Of Deposition Fluxes

Price

Free (open access)

Paper DOI

10.2495/EURO990342

Volume

36

Pages

6

Published

1999

Size

356 kb

Copyright

WIT Press

Author(s)

L. Dutaur, S. Cieslik, A. Carrara and A. Lopez

Abstract

The Detection of Nonstationarity in the Determination of Deposition Fluxes A contribution to subproject BIATEX-2 L Dutaur\ S. Cieslik\ A. Carrara^ and A. Lopez^ ' Environment Institute, Joint Research Centre, 21020 Ispra (VA), Italy Laboratoire d'Aerologie, Universite Toulouse III, 31400 Toulouse, France Introduction The eddy-correlation method is largely considered as the most reliable way of measuring vertical fluxes of scalar variables between the earth's surface and the atmosphere. It is based on the calculation of the covariance of two rapidly fluctuating quantities: the vertical component of the wind vector (H>) and the variable under consideration (noted hereafter as C where this variable is a concentration). Fluctuations are defined by W (1) where the overbar denotes the time averaging operation; the flux is then expressed by

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