Jökull - 01.12.1969, Side 40

Depth in m 1965
1966
1967
1968
0 -0.79 0.11 — 2.49 0.61
10 -0.78 0.02 — 2.44 -0.70
25 - 2.33 - 1.03 — 3.26 -2.52
50 ...:.. - 1.82 - 1.36 — 2.27 - 1.77
100 - 1.04 -0.98 — 0.97 -0.59
150 — — — 0.46 -0.28
200 0.62 -0.09 — 0.25 -0.03
300 — — — -0.61
400 0.51 — — 0.05
500 0.34 — — -0.06
s °/
Depth in m 1950 1952 1953 1954 1955
0 0.03 0.01 - 0.12 0.01 -0.01
10 0.04 0.00 - 0.11 -0.01 - 0.01
25 0.05 -0.01 - 0.08 -0.02 0.02
50 0.02 -0.02 - 0.05 -0.01 0.04
100 -0.02 0.00 - 0.05 -0.03 -0.03
150 -0.03 0.01 - 0.02 -0.04 0.00
200 -0.04 0.00 - 0.01 -0.01 -0.02
300 -0.04 0.00 - 0.01 0.01 0.00
400 -0.04 -0.01 - 0.01 0.01 0.00
500 — — 0.02 0.00 —
Depth in m 1956 1957 1958 1964
0 0.03 -0.02 0.06 - 0.25
10 0.02 -0.02 0.06 -0.26
25 0.02 -0.02 0.05 -0.25
50 0.03 -0.02 0.04 -0.22
100 0.05 0.00 0.03 -0.02
150 0.04 0.00 0.02 0.02
200 0.04 0.00 0.02 0.04
300 0.03 0.01 0.01 0.02
400 0.01 0.00 0.01 0.01
500 0.01 - 0.01 0.01 0.00
Depth in m 1965 1966 1967 1968
0 -0.63 -0.20 0.68 - 1.71
10 -0.79 -0.20 0.68 - 1.25
25 -0.57 -0.17 0.26 -0.60
50 -0.34 -0.15 0.15 -0.24
100 -0.15 - 0.08 0.09 -0.11
150 — — 0.08 -0.09
200 -0.01 0.02 0.01 - 0.05
300 — — — -0.10
400 0.02 — — -0.07
500 0.01 — — -0.03
1958 the salinity was at the highest both north-
east and south of Iceland during tliis same
period. The results shown in Fig. 5 are based
on all available sea surface data frorn the ocean
area south of Iceland during the period 1951—
1965, according to the data lists of the Inter-
national Council for the Exploration of the
Sea. The study was made in three areas within
latitude 60° and 63° N and longitudes 10° to 15°
W, 15° to 20° W and 20° to 25° W. In general
the results show an increase in sea surface
temperature of about 1° C from 1951 to 1960
and an increase in salinity of 0.06—0.08%o. The
increase in temperature is greater in winter
than in summer, at which time there may even
be a decrease in temperature.
The negative salinity anomalies in June
1964—1968 northeast of Iceland are usuallv
highest at the sea surface (see Fig. 4). They
decrease with depth down to about 100—200 m,
where the values become almost normal. The
same is true for the temperature anomalies,
except for the temperature values at the sea
surface which are relatively high due to sum-
mer heating. The negative salinity and tem-
perature anomalies in June were highest in
1965, 1967 and 1968. They were as follows:
1965 — 0.7%c in salinity and more than — 2° C
in temperature,
1967 — Q.l%c in salinity and more than — 3° C
in temperature,
1968 — \.l%oo in salinity and about —2.5° C in
temperature.
In 1964 and 1966 tlie negative anomalies
were as follows:
1964 — 0.25%„ in salinity ancl about — 0.6° C
in temperature,
1966 —0.2%0 in salinity and about — 1.4° C in
temperature.
It should be mentioned that clue to extreme-
ly unfavourable ice conditions in North Ice-
landic waters in the spring of 1968, the annual
investigations in the area could not be carried
out until late June, whereas in the other years
they were mostly carried out in early June.
That may be the reason why the sea tempera-
ture was higher in 1968 than in 1967.