Field comparison of two novel open-path instruments that measure dry deposition and emission of ammonia using flux-gradient and eddy covariance methods
Daan Swart,Jun Zhang,Shelley van der Graaf,Susanna Rutledge-Jonker,Arjan Hensen,Stijn Berkhout,Pascal Wintjen,René van der Hoff,Marty Haaima,Arnoud Frumau,Pim van den Bulk,Ruben Schulte,Margreet van Zanten,and Thomas van Goethem
During a 5-week comparison campaign, we tested two set-ups to measure half hourly ammonia fluxes. The eddy covariance and flux gradient systems showed very similar results when the upwind terrain was both homogeneous and free of obstacles. We discuss the technical performance and practical limitations of both systems. Measurements from these instruments can facilitate the study of processes behind ammonia deposition, an important contributor to eutrophication and acidificationin natural areas.
During a 5-week comparison campaign, we tested two set-ups to measure half hourly ammonia...