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Comparision of 5 hypsometric curves For Lower Mystic Lake (blue points are average of 3)

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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:

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Presentation Transcript
slide1

Comparision of 5 hypsometric curves

For Lower Mystic Lake

(blue points are average of 3)

slide2

Kalff, Ch. 11

Highlights

slide3

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

slide14

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

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