caa a22 4500 528847147 20200725032044.0 cr unu---uuuuu 180926e201809 xx s 000 0 eng 1541-5856 10.1002/lom3.10267 doi (BORIS)oai:boris.unibe.ch:120095 550 ddc 910 ddc Improving surface heat flux estimation for a large lake through model optimization and two-point calibration: The case of Lake Geneva [Elektronische Daten] [Abolfazl Irani Rahaghi, Ulrich Lemmin, Andrea Cimatoribus, Damien Bouffard, Michael Riffler, Stefan Wunderle, David Andrew Barry] publishedVersion openAccess eu-repo Net Surface Heat Flux (SurHF) was estimated from 2008 to 2014 for Lake Geneva (Switzerland/France), using long-term temperature depth profiles at two locations, hourly maps of reanalysis meteorological data from a numerical weather model and lake surface water temperatures from calibrated satellite imagery. Existing formu- las for different heat flux components were combined into 54 different total SurHF models. The coefficients in these models were calibrated based on SurHF optimization. Four calibration factors characterizing the incoming long-wave radiation, sensible, and latent heat fluxes were further investigated for the six best performing models. The combination of the modified parameterization of the Brutsaert equation for incoming atmospheric radiation and of similarity theory-based bulk parameterization algorithms for latent and sensible surface heat fluxes provided the most accurate SurHF estimates. When optimized for one lake temperature profile location, SurHF models failed to predict the temperature profile at the other location due to the spatial variability of mete- orological parameters between the two locations. Consequently, the optimal SurHF models were calibrated using two profile locations. The results emphasize that even relatively small changes in calibration factors, par- ticularly in the atmospheric emissivity, significantly modify the estimated long-term heat content. The lack of calibration can produce changes in the calculated heat content that are much higher than the observed annual climate change-induced trend. The calibration improved parameterization of bulk transfer coefficients, mainly under low wind regimes. Rahaghi Abolfazl Irani joint author Lemmin Ulrich joint author Cimatoribus Andrea joint author Bouffard Damien joint author Riffler Michael joint author Wunderle Stefan joint author Barry David Andrew joint author Limnology and oceanography: methods 16(9), pp. 576-593 1541-5856 https://boris.unibe.ch/120095/2/Rahaghi_et_al-2018-Limnology_and_Oceanography%253A_Methods.pdf text/html WWW-Backlink auf das Repository Onlinezugriff via WWW text/html https://aslopubs.onlinelibrary.wiley.com/doi/epdf/10.1002/lom3.10267 BORIS BK010053 XK010053 XK010000 1 info:eu-repo/semantics/article boris PeerReviewed boris peerstatus BORIS BORIS BORIS info:eu-repo/semantics/article openAccess BORIS 856 40 https://boris.unibe.ch/120095/2/Rahaghi_et_al-2018-Limnology_and_Oceanography%253A_Methods.pdf text/html WWW-Backlink auf das Repository BORIS 856 42 Onlinezugriff via WWW text/html https://aslopubs.onlinelibrary.wiley.com/doi/epdf/10.1002/lom3.10267 BORIS 700 1- Rahaghi Abolfazl Irani joint author BORIS 700 1- Lemmin Ulrich joint author BORIS 700 1- Cimatoribus Andrea joint author BORIS 700 1- Bouffard Damien joint author BORIS 700 1- Riffler Michael joint author BORIS 700 1- Wunderle Stefan joint author BORIS 700 1- Barry David Andrew joint author BORIS 773 0- Limnology and oceanography: methods 16(9), pp. 576-593 1541-5856