15 



salinity, and an under layer, which has 28— 32"/o(i. Where the depth is greater the 

 salinity is even higher. At Schultz's Grand it increases during the summer months, 

 when it is greatest, up to 3'2 — 113 "/oo at a depth of 2(i M. During the winter months 

 the salinity at the holtom is less (at Schult/'s Grund ca. 29 — 30" i»i), while at the 

 same time the surface salinity increases on account of the intermixing. The maximal 

 temperature at the bottom is relatively low, lower than it is both north and south 

 of the region. The mean temperature of the bottom-waters lor the year is 7°. Ac- 

 cording to J. P. J.vcoHSKN (I.e.) the conditions at Schultz's Grund are the following: 



M. 



Salinity 

 16- 21,6" 

 Temperature 



10 M. j 20 M. 



Salinity ! Salinity 



19,9- 23,3 "/(M, 

 Temperature 



27,8-31, 5 "/oo 

 Temperature 



20 M. 



Salinity 



29,1- 32,9 "/(lo 

 Temperature 



1,5° (Febr.) -17-^ ( Aug.) \ T (Febr.) -16,5" (Aug.) , 3,3°(Mch.)-13"(Aug.) j 3,8°(Mch.)— 12 (Aug.) 



In the area between Sams0, Jutland and Fyen the depths are mostly not 

 more than 20 M. The salinity at the surface increases considerably towards the 

 Jutland coast, where it is greater than in the adjacent regions, which is caused by 

 the salt bottom-water here being nearer the surface and mixed with the surface- 

 water. On account of this also the surface water's maximum temperature is here 

 r lower than in the Kattegat. At a depth of 20 M. the salinity is 25— 30" nn, the 

 temperature 2,5 — 13,5. 



To illustrate the conditions in the Isefjord the following averages for the 

 surface-water at Rorvig, near the mouth, and at Frederikssund , half way up Ros- 

 kildefjord, during the years 1902 — 1906 may be given: 



Salinity mean temperature in 



Februarj' (the coldest month) .hily (the warmest month) 



Rorvig 19,4 "/"o 0,6° (-^ 0,9— + 1,8) 17,3° (16,1 -18,7) 



Frederikssund . . . 15 "/oo 0,4° (-h 0,6— + 1,9) 18,0° (16,6—19,7) 



In the Great Belt the salinity of the surface-water is very variable. Thus, 

 at Sproge it varies between 10 "/oo and 20*'/oo. The highest salinity is found at the 

 coast of Fyen. A salt bottom-water is found here, but the boundary between this 

 and the surface-water is here not so distinct as in the Kattegat. At a depth of 

 20 — 25 M. the temperature alternates between 3° and 13°, at the same depth the 

 maximum salinity is reached in July and is 27 "/on. 



The following averages for 1895 — 1902 illustrate the conditions (manuscript 

 lists). The western part of the Great Belt; 55°18' N. L. 10°54' E. L. 



Temperature Salinity 



Min. Max. Min. Max. 



OM 2,2 (March) 16,6 (Aug.) 13,4"/iio 18,3 



15 - 2,2 (March) 13,9 (Sept.) 17,1 - 24,3 



23 - 2,4 (March) 13,2 (Sept.) 18,7 - 27,6 



