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dc.contributor.authorNOGES Peeteren_GB
dc.contributor.authorNOGES Tiinaen_GB
dc.contributor.authorGHIANI Michelaen_GB
dc.contributor.authorPARACCHINI Brunoen_GB
dc.contributor.authorPINTO GRANDE Joaquinen_GB
dc.contributor.authorSENA Fabrizioen_GB
dc.date.accessioned2013-09-18T00:03:00Z-
dc.date.available2011-11-30en_GB
dc.date.available2013-09-18T00:03:00Z-
dc.date.created2011-10-25en_GB
dc.date.issued2011en_GB
dc.date.submitted2010-06-29en_GB
dc.identifier.citationHYDROBIOLOGIA vol. 667 no. 1 p. 241-254en_GB
dc.identifier.issn0018-8158en_GB
dc.identifier.urihttp://link.springer.com/article/10.1007%2Fs10750-011-0691-7en_GB
dc.identifier.urihttp://publications.jrc.ec.europa.eu/repository/handle/JRC59406-
dc.description.abstractWithin two years of contrasting temperature dynamics, 2008 and 2009, we studied the thermal and optical regime of two adjacent stratified lakes in Lombardy lake area in Italy, the oligotrophic Lake Monate (2.5 km2, max. depth 34 m) and the eutrophic Lake Varese (14.8 km2, 26 m). After the cold winter 2008-2009, a heat wave starting in May turned the whole year 2009 the second hottest after 2003. We hypothesized that (i) the summer heat wave in 2009 would increase the thermal stability of both lakes compared to summer 2008 and (ii) the differences in size and trophic state would cause systematic differences in heat distribution within the lakes¿ water columns. The particular sequence of meteorological events - the cool winter followed by a hot summer in 2009, resulted in extreme vertical temperature gradients and unusually high thermal stability of both lakes. All calculated thermal parameters, the heat content (Tt), volume-weighted mean temperature (T), Schmidt thermal stability (S), and Birgean work (B), showed the highest values in 2009 while also the values for 2008 exceeded considerably those published for these lakes in the past. Due to large wind exposed surface, wind mixing was supposedly the dominating mechanism of heat transfer in the shallower Lake Varese where due to low water transparency large amount of solar energy became trapped in the top layers increasing the contrast with bottom layers ¿ a phenomenon that is generally typical to deep lakes. Contrary, in Lake Monate, which is deeper and more transparent than Lake Varese, solar irradiance that penetrated up to the metalimnion contributed considerably to the vertical energy transfer and gave to the lake some features typical to rather shallow lakes.en_GB
dc.description.sponsorshipJRC.H.1-Water Resourcesen_GB
dc.format.mediumPrinteden_GB
dc.languageENGen_GB
dc.publisherSPRINGERen_GB
dc.relation.ispartofseriesJRC59406en_GB
dc.titleMorphometry and trophic state modify the thermal response of lakes to meteorological forcingen_GB
dc.typeArticles in periodicals and booksen_GB
dc.identifier.doi10.1007/s10750-011-0691-7en_GB
JRC Directorate:Sustainable Resources

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