Abstract
The daily course of evapotranspiration ( E) in a willow carr (stand of Salix cinerea L. and Salix pentandra L.) was calculated from meteorological data for 3 months (July–September 1983) by the Bowen-ratio method, and compared with evapotranspiration of the surrounding sedge-grass marsh ( Carex gracilis Curt., Calamagrostis canescens (Weber) Roth and Glyceria maxima (Hartm.) Holmberg evaluated in the previous years by the same method. A considerable difference was found only for July, which was extremely hot in 1983. The daily average E was 4.8, 3.2 and 2.4 mm day −1, in July, August and September, respectively. The enhancement or reduction of E under non-neutral air stability conditions were less than 10% of E under air stability conditions. Calculation of E for non-neutral air stratification is discussed in the paper.
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