Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1002/hyp.13653
Lizenz creative commons licence
Titel (primär) Assessing vertical diffusion in a stratified lake using a 3D hydrodynamic model
Autor Dong, F.; Mi, C.; Hupfer, M.; Lindenschmidt, K.-E.; Peng, W.; Liu, X.; Rinke, K.
Quelle Hydrological Processes
Erscheinungsjahr 2020
Department SEEFO
Band/Volume 34
Heft 5
Seite von 1131
Seite bis 1143
Sprache englisch
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Keywords Lake Arendsee; Vertical turbulent diffusivity; Stratification dynamics; Climate change; EFDC
Abstract Vertical turbulent diffusivity (Kz), which can be estimated from water temperature, is a key factor in the evolution of water quality in lentic waters. In this study, we analysed the capability of a three‐dimensional hydrodynamic model (EFDC) to capture water temperature and vertical diffusivity in Lake Arendsee in the Northern German plain. Of particular interest to us is to evaluate the model performance for capturing the diffusion minimum within the metalimnion and analyse the response of the metalimnetic Kz to meteorological forcing, namely changing wind speed and warming. The comparison confirmed that the calibrated model could reproduce both stratification dynamics and vertical diffusion profiles in the lake. The model was also shown to be able to capture the duration and vertical extent of the metalimnetic diffusion minimum. The scenario results illustrate that, compared to air temperature, wind velocity appeared to be the more influential meteorological variable on the vertical exchange within the metalimnion. While increasing wind velocities mostly affected the minimum values of Kz in the metalimnion and thus led to intensified vertical exchange, the reduction of wind velocity mostly affected the depth of minimal Kz, but not its absolute value.
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=22559
Dong, F., Mi, C., Hupfer, M., Lindenschmidt, K.-E., Peng, W., Liu, X., Rinke, K. (2020):
Assessing vertical diffusion in a stratified lake using a 3D hydrodynamic model
Hydrol. Process. 34 (5), 1131 - 1143 10.1002/hyp.13653