The use of disjunct eddy sampling methods for the determination of ecosystem level fluxes of trace gases - Turnipseed, A. A.; Pressley, S. N.; Karl, T.; Lamb, B.; Nemitz, E.; Allwine, E.; Cooper, W. A.; Shertz, S.; Guenther, A. B. (Atmos. Chem. Phys., 2009)