Seasonal and interannual variation in water vapor fluxes and energy balance in a moist mixed grassland

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dc.contributor.authorWever, Linda A.
dc.contributor.authorUniversity of Lethbridge. Faculty of Arts and Science
dc.contributor.supervisorFlanagan, Larry B.
dc.date.accessioned2007-04-25T14:41:17Z
dc.date.available2007-04-25T14:41:17Z
dc.date.issued2001
dc.degree.levelMasters
dc.descriptionx, 70 leaves : ill. ; 28 cm.en
dc.description.abstractFluxes of sensible and latent heat were measured over a grassland during 1998 and 1999 using the eddy covariance technique. The study objectives were to document seasonal and interannual variation evapotranspiration. Bowen ratios were lower in 1998 (0.5-3.0) than in 1999 (2.5-8.5) due to lower evapotranspiration rates (E). Maximum E also occurred later in 1998 than in 1999; Day 188 (10.4 mmol m-2s-1) versus Day 152 (5.6 mmol m-2s-1). Daily evapotranspiration rates were positively correlated with net radiation, canopy conductance, plant nitrogen content, leaf area index and soil moisture. Based on calculations of the decoupling coefficient (O). evapotranspiration was more constrained by canopy conductance in 1999 (O<0.2) than in 1998 (O>0.3). Evapotranspiration and energy partitioning in this grassland were sensitive to seasonal changes in soil moisture and interannaual variation in spring precipitation. Annual evapotranspiration was 300 mm.en
dc.identifier.urihttps://hdl.handle.net/10133/124
dc.language.isoen_USen
dc.publisherLethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 2001en
dc.publisher.departmentDepartment of Biological Sciences
dc.publisher.facultyArts and Science
dc.relation.ispartofseriesThesis (University of Lethbridge. Faculty of Arts and Science)en
dc.subjectEvapotranspiration -- Albertaen
dc.subjectWater balance (Hydrology)en
dc.subjectGrasslands -- Albertaen
dc.subjectDissertations, Academicen
dc.titleSeasonal and interannual variation in water vapor fluxes and energy balance in a moist mixed grasslanden
dc.typeThesisen
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