Jökull

Eksemplar

Jökull - 01.12.1993, Side 13

Jökull - 01.12.1993, Side 13
Figure 14. Distribution of correlation coefficients of the annual temperature in 1925-1990 between Reykja- vík as a basic station and other stations in the eastern North-Atlantic. — Fylgni árshita 1925-1990 í Reykja- vík við aðrar veðurstöðvar í Norður-Atlantshafi. Figure 15. Distribution of correlation coefficients of the annual temperature 1925-1990 between Grímsey as a basic station and other stations in the east- ern North-Atlantic. — Fylgni árshita 1925-1990 í Grímsey við aðrar veðurstöðvar. ues. Another approach to this study is to calculate the correlation of annual temperatures of 1925-1990 be- tween selected basic stations and the other weather stations. The period 1925-1990 was used because observations are lacking from the first years of the century at some stations north of Iceland. Altogether data from 20 weather stations were used in the calcu- lations (not including Hopen which started in the year 1946, Ivigtut which was only in function until 1960 and Upernavik to 1980). Using Reykjavík as a basic station, Figure 14 shows a map of the distribution of the correlation co- efficients of annual temperature with other weather stations, for the period 1925-1990. A correlation co- efficient r > 0.7 (explaining more than 50% of the variance), is found within a region towards west and southwest of Reykjavík, all the way to SW-Greenland, i-e. Angmagssalik (r = 0.77), and in an area reaching towards east, over Iceland and almost to Thorshavn (r = 0.64). Farther eastwards the correlation coeffi- cients decrease rapidly. They are only r = 0.09-0.13 at the west coast of Norway, the lowest ones calculated on this chart, confirnfing the conclusion in a previous section of small correlation of temperatures between Iceland and W-Norway. A chart having Vestmanna- eyjar as a basic station, shows the same characteristics as described for Reykjavík. The regions with r = 0.5-0.7 (or even lower values) cover the frequent tracks of cyclones from southwest towards northeast, which more or less influence tem- perature conditions in the North-Atlantic as a whole. The area where r > 0.8, is the same area as location the Icelandic Low. Figure 15 shows the distribution of the correlation coefficients with other stations for the period 1925- 1990 with Grímsey as a basic station. A region cov- ering r > 0.7 includes Iceland, reaches southeast to Thorshavn (r = 0.7), northeast over Jan Mayen (r = 0.72) and southwest over Denmark Strait and along the coast of Greenland, south of Angmagssalik (r = 0.69). The values r = 0.6 stretch north to Jan Mayen and JÖKULL, No. 43, 1993 11

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Jökull

Qulequttap nassuiaataa:
Ársrit Jöklarannsóknarfélags Íslands og Jarðfræðafélags Íslands
Saqqummersitap suussusaa:
Katersaatit:
Gegnir:
ISSN:
0449-0576
Oqaatsit:
Ukioqatigiiaat:
72
Assigiiaat ilaat:
73
Aviisini allaaserineqarsimasut nalunaarsornikut:
Saqqummersinneqarpoq:
1951-Massakkut
Iserfigineqarsinnaavoq piffissaq una tikillugu:
2023
Saqqummerfia:
Redaktør:
Jón Eyþórsson (1952-1967)
Sigurður Þórarinsson (1957-1982)
Guðmundur Pálmason (1965-1976)
Sveinbjörn Björnsson (1967-1976)
Helgi Björnsson (1983-1985)
Leó Kristjánsson (1983-1985)
Ólafur G. Flóvenz (1986-1987)
Tómas Jóhannesson (1988-1989)
Helgi Björnsson (1990-1993)
Leó Kristjánsson (1990-1993)
Áslaug Geirsdóttir (1994-2007)
Tómas Jóhannesson (1998-1998)
Bryndís Brandsdóttir (1998-2007)
Halldór Gíslason (2002-2003)
Snævarr Guðmundsson (2006-2007)
Freysteinn Sigmundsson (2008-2008)
Leifur A. Símonarson (2008-2008)
Olgeir Sigmarsson (2008-2008)
Ívar Örn Benediktsson (2012-2012)
Helgi Björnsson (2012-2012)
Guðrún Larsen (2012-2012)
Olgeir Sigmarsson (2012-2012)
Bryndís Brandsdóttir (2013-2016)
Snævarr Guðmundsson (2013-2016)
Þorsteinn Þorsteinsson (2013-2016)
Oqaaseq paasinnissutissaq:
Allaaserineqarnera:
Reykjavík Jöklarannsóknafélag Íslands Jarðfræðafélag Íslands 1951-.

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