Excursion
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oppervlakte    369,98 kmē                        omtrek         158,4 km
max. lengte     51,6 km                             hoogte           65 m 
max. breedte  17,2 km
max. diepte     346m

temperatuur

maand   
                    water                      lucht
dec - feb                       6°- 8°                      5°-15°
mrt - mei                       9°-18°                    15°-24°
jun - aug                     17°-27°                   24°-32°
sep                              22°-17°                   28°-20°
okt - nov                     15°-10°                   20°-10°