Jökull

Ataaseq assigiiaat ilaat

Jökull - 01.12.1993, Qupperneq 6

Jökull - 01.12.1993, Qupperneq 6
Figure 5. Mean monthly standard deviation of tem- perature in 1925-1990 for Reykjavík, Thorshavn, Nordöyan fyr, Björnöya, Jan Mayen, Angmagssalik and Godthaab/Nuuk, in °C. — Árssveifla staðalfrá- vika mánaðarmeðaltals hita (°C) árin 1925-1990 í Reykjavík, Þórshöfn í Fœreyjum, Nordöyanfyr, Björn- öya, JanMayen, Angmagssalik and Godthaab/Nuuk. Figure 6. Numbers of years, for each of the 16 North- Atlantic weather stations outside Iceland, when the five warmest or coldest years in Iceland during 1901- 1990 occurred simultaneously at these stations. — Fjöldi ára á 16 erlendu/nálœgu veðurstöðvunum (sjá 1. mynd) þar semfimm hlýjustu eða köldustu ár tímabilsins 1901-1990 á Islandi, mœldust einnig. COMPARISON OF FIVE WARMEST AND COLDEST YEARS 1901-1990 IN ICE- LAND AND NEIGHB OURIN G WEATHER STATIONS For comparison of temperature conditions in Ice- land and the neighbouring area we consider the spa- tial coherence of extremes. Einarsson (1991) showed a table of the 5 highest and lowest annual tempera- tures during the period 1901-1990, for the 7 Icelandic weather stations considered here. The question arises, how many of the 5 warmest or coldest years in Iceland during this period are also extreme in that respect at some of the 16 eastern North-Atlantic weather stations which are presented in this paper? The answer was approached as follows: First, the 5 warmest and cold- est years from the 7 weather stations in Iceland were identified as: a) the warmest years (10 years): 1928, 1933, 1939, 1941,1945, 1946, 1953, 1960,1964, 1972 b) the coldest years (14 years): 1902, 1903, 1906, 1907, 1914, 1917, 1918, 1919, 1921, 1968, 1969, 1979, 1981, 1983 This is altogether 24 years, and the question is, whether 5 (or more) of the warmest or the coldest years in Iceland were also such extreme years at the 16 other N-Atlantic stations. As an example the year 1939isone ofthe5 warmestyearsat6outof7 stations. Figure 6 shows the numbers of years for each of the 16 North-Atlantic weather stations, when some of the 5 warmest or coldest years during 1901-1990 were also such extremes in Iceland. The number of the extreme years for the 16 stations was 95, of which the coldest years were 61 but the warmest years 34. Some 42-54% (10/24 = 41.7%, 13/24 = 54.2%) of the warmest/coldest years in Iceland are found to be ex- treme in that respect within a rather large region around Iceland (Figure 6). This region includes the Faeros Is- lands, extends more than half way to W-Norway and Jan Mayen, covers the Greenland Sea and a part of 4 JÖKULL, No. 43, 1993
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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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1. tölublað (01.12.1993)

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