15 
salinity, and an under layer, which has 28—32°/0. Where the depth is greater the 
salinity is even higher. At Schultz’s Grund it increases during the summer months, 
when it is greatest, up to 32—33°/oo at a depth of 26M. During the winter months 
the salinity at the bottom is less (at Schultz’s Grund ca. 29—80°/o0), 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 for the year is 7°. Ac- 
cording to J. P. JACOBSEN (1. c.) the conditions at Schultz’s Grund are the following: 
0 M. 10 M. 20 M. 26 M. 
Salinity Salinity Salinity | Salinity 
16—21,6 900 19,9— 23,3 °/00 27,8—31,5 [00 29,1 — 32,9 oo 
Temperature Temperature | Temperature Temperature 
1,5° (Febr.) —17° (Aug.) | 2° (Febr.) —16,5° (Aug.)| 3,3°(Mch.)—13°(Aug,) | 3,8° (Mch.)—12° (Aug.) 
In the area between Samso, 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 waters maximum temperature is here 
1° lower than in the Kattegat. At a depth of 20 M. the salinity is 25—30° 00, 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 
February (the coldest month) July (the warmest month) 
Bones 19,4 0/00 06009 018) 17,3° (16,1--18,7) 
Frederikssund... 1500 0,4° (+ 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 Sprogø 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 °/oo. 
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. 
UM See 2,2(March) 16,6 (Aug.) 13,4°/00 18,3 
15 - ...... 292 (March) 13,9 (Sept) Wiel 24,3 
DNA ENT. 2,4 (March) 13,2 (Sept.) 18,7 - 27,6 
