11 - 



anci 25 metres point out th^t the sh=illov/er (sub- surf nee ) waters of 



the open oce^n proceeding into the B^y of Fundy r^re lowered in 



temperature „ This lowering of the temperature of the upper layers 



coupled with the rise in the temperature of the lower layers indicates 



that mixing of the waters of the various layers takes place on a 



considerable scale. Granting this, it is evident that there are two 



important regions v/he.re mixing takes place on a l^rge scale o One to 



the southwest of Grand Manan, and one over an nrea extending from 



Digby outward along the coast of Nova Scotia, As was seen in the 



vertical di stributions , considerable mixing in the main v/ater mass 



takes place generally In the whole Bay of f'undy area, 



(b) Salinity 



The distribution of salinity at depths of 1, 25 ^nd 50 metres 



Is shown in figures 9, 10 and 11, The waters at the head of the 



Bay of Fundy at a depth of 1 metre (figure 9) have a salinity as 



o o 



low as 31^0 /oo In Chignecto Channel, and as low as 31,7 /oo in 



Mlnas 'Channel o At the mouth of the Bay^ salinities are as high as 



o 

 32,89 /oo o From, the region between Saint John and flgby to the 



head of the Bay^ the gradation in salinity is most m.arked, ranging 



o o 



from a maximum of 32,5 /oo to a minimum of less than 31,0 /oo in 



the Chignecto region. 



In figure 10 the Isohalines for the 25 metre level sliow much the 

 same distributional pattern as at 1 metre with the exception that 

 the isohalines near the head of the Bay tend to run across the Bay, 



At the 50 metre level (figure 11) the isohalines tend to follov/ 



the direction of the bottom contours. The salinities in this deeper 



portion of the Bny of Fundy, have an extremely small range (32,9 - 



c 

 33,0 /oo). 



