Jökull - 01.12.1991, Síða 8

Fig.5 : Standard deviation of the tem-
perature of January 1941- 1985, °C.
Mynd 5 : Staðalfrávik janúarhita
1941-1985, °C.
The considerable difference of the July standard
deviation between northeastern Iceland and the
southern and western part of the country indicates
quite different weather conditions during summer. In
the former region fair weather is associated with
warm air of a southerly origin, and a föhn may add to
the high temperatures in the aftemoon, while norther-
ly winds are quite cool in that area. It happens that
either of these two weather types dominates for
weeks. In southem and western Iceland temperature
variations between different weather types are much
smaller. Fair weather is to be expected in northerly
wind directions whereas the southerly air masses are
accompanied by overcast sky and precipitation.
Fig.6 : Standard deviation of the tem-
perature of July 1941-1985, °C.
Mynd 6 : Staðalfrávik júlíhita
1941-1985, °C.
6 JÖKULL,No. 41, 1991