Eddy Covariance

This highly practical handbook is an exhaustive treatment of eddy covariance measurement that will be of keen interest to scientists who are not necessarily specialists in micrometeorology. The chapters cover measuring fluxes using eddy covariance technique, from the tower installation and system dimensioning to data collection, correction and analysis. With a state-of-the-art perspective, the authors examine the latest techniques and address the most up-to-date methods for data processing and quality control. The chapters provide answers to data treatment problems including data filtering, footprint analysis, data gap filling, uncertainty evaluation, and flux separation, among others. The authors cover the application of measurement techniques in different ecosystems such forest, crops, grassland, wetland, lakes and rivers, and urban areas, highlighting peculiarities, specific practices and methods to be considered. The book also covers what to do when you have all your data, summarizing the objectives of a data base as well as using case studies of the CarboEurope and FLUXNET databases to demonstrate the way they should be maintained and managed. Policies for data use, exchange and publication are also discussed and proposed. This one compendium, is a valuable source of information on eddy covariance measurement that allows readers to make rational and relevant choices in positioning, dimensioning, installing and maintaining an eddy covariance site; collecting, treating, correcting and analyzing eddy covariance data; and scaling up eddy flux measurements to annual scale and evaluating their uncertainty.

Contenu

Preface.- 1. The eddy covariance method.- 2. Measurement set-up.- 3. Data acquisition and flux calculations.- 4. Corrections and data quality control.- 5. Night time flux correction.- 6. Data gap filling.- 7. Uncertainty quantification.- 8. Footprint analysis.- 9. Partitioning of net fluxes.- 10. Disjunct eddy covariance method.- 11. Eddy covariance measurements over forests.- 12. Eddy covariance measurements over crops.- 13. Eddy covariance measurements over grasslands.- 14. Eddy covariance measurements over wetlands.- 15. Eddy covariance measurements over lakes.- 16. Eddy covariance measurements over urban areas.- 17. Database maintenance, data sharing policy, collaboration.- Symbol Index.- Subject Index