200 likes | 286 Views
Comparision of 5 hypsometric curves For Lower Mystic Lake (blue points are average of 3). Kalff, Ch. 11 Highlights. Heat and Stratification Key ideas The Heat budget of a lake Definitions The components of the heat budget:
E N D
Comparision of 5 hypsometric curves For Lower Mystic Lake (blue points are average of 3)
Kalff, Ch. 11 Highlights
Heat and Stratification Key ideas The Heat budget of a lake Definitions The components of the heat budget: (1-A) Rs +RLd –Rlup-LE-H +Qin-Qout-Qsed+M = rate of change in storage Individual fluxes: Shortwave radiation (from last class, mostly) Longwave radiation: Boltzmann eqn, Wein displacement law, emissivity Longwave back radiation: sky, clouds, canopy Evaporative heat flux Sensible Heat Ice formation and melting Stratification Definitions Local stability Water column stability Relationships with lake morphometry and size Vertical Mixing and entrainment Quantitative models Empirical: mass tracer or heat as a tracer
In Eagleson, 1970
Ragotzkie, in Lerman et al. 1979
In: Ragotzkie, 1978
Upper Mystic Lake Data, October 1, 1984 Depth Temp deg C DO mg/L Light Intensity (uE/(m2s) 0 18.3 9.1 660 0.5 540 1 18.3 300 2 18.2 105 3 18.2 9 6 18.2 8.3 7 18 7.6 8 16.5 0.7 9 17 0.5 10 14 0.075 11 11.7 12 11.7 13 10.9 14 9.8 15 9.8 Secchi Depth = 2 m