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<br />Ii) -; r; "} Cj :> <br />:; -':1 >'. ;) _1 ',-" <br /> <br />WIND DIRECTION <br /> <br />ICE <br /> <br /> <br /> <br /> <br /> <br />, <br />, e <br />, <br />, <br />, <br /> <br /> <br />e <br /> <br /> <br />o <br />I <br /> <br />'0 <br />I <br /> <br />20 <br />I <br /> <br />30 <br />I <br /> <br />DEGREES CELSIUS <br /> <br />EXPLANATION <br />THERMAL PROFILE e <br />( DIRECTION OF CIRCULATION <br /> <br /> <br />Figure 5.--Seasonal thermal profiles and circulation patterns in a <br />temperate zone lake (modified from Britton and others, 1975, p. 4). <br /> <br />13 <br />