Jökull - 01.12.1972, Blaðsíða 56

1AUGUST 1968
Fig. 7. Computed and
measured ablation. Per-
centage part of heat bal-
ance terms in computed
ablation. Daily course of
mean wind speed, vapor
pressure and air tempera-
ture. Weather and pre-
vailing wind direction.
Mynd 7. Bœgisárjökull,
1968. Samanburður á
reiknaðri og mceldri leys-
ingu. Hlutur orkuþátta í
leysingu. Ferill vindhraða,
raka og hitastigs, veður-
lýsing, vindátt.
A summary oi how the relative importance of
the processes varied in both summers is given
in Table 1 together with some climatic ele-
ments. During the first half of July in 1968
ablation was relatively low and the net radia-
54 JÖKULL 22. ÁR
tion suppiied for the dominating part of it.
The air temperature was at and below normal
for this period. The first week was influenced
by an anticyclone above Iceland with dry south-
westerly winds. For the days July 2 to 5 we