Jökull


Jökull - 01.12.2006, Page 93

Jökull - 01.12.2006, Page 93
Jöklabreytingar 2004–2005 um og er það auðveldara að sjá hvaða jökla hegða sér „eðlilega“ og hverjir „afbrigðilega“. Þeir jökuljaðrar, sem ekki hafa gengið fram á kalda skeiðinu og nokk- urn vegin í réttu hlutfalli við það sem þeir hafa hopað bæði fyrir og eftir sýna ekki „rétt“ viðbrögð við lofts- laginu. Þar þarf að leita skýringa annað hvort í eðli jökulsins (t.d. framhlaupsjökull) eða sérstökum kring- umstæðum (t.d. aurkápa á sporði eða óreglulegt undir- lag). Sums staðar blasir skýringin við en annars staðar kann hún að vera vandfundin. SUMMARY Glacier variations 1930–1970, 1970–1995, 1995– 2004 and 2004–2005 This year was warm but not as the previous 3 years. The fall of 2005 began early with snow in the moun- tains and on the glaciers by late August. September was cold and in some cases this early snow prevented measurements. The mass balance was negative on most of the glaciers but some mountain glaciers in the north and east may have increased in mass. Glacier variations were measured at 44 locations. Two glacier snouts advanced, one due to a surge, one snout was stationary, and the rest retreated. HEIMILDIR Oddur Sigurðsson 1989. Afkoma Hofsjökuls 1987–1988. Orkustofnun, OS-91005/VOD-02B. Oddur Sigurðsson 1991. Afkoma Hofsjökuls 1988–1989. Orkustofnun, OS-91052/VOD-08B. Oddur Sigurðsson 1993. Afkoma nokkurra jökla á Íslandi 1989–1992. Orkustofnun, OS-93032/VOD-02. Oddur Sigurðsson og Ólafur Jens Sigurðsson 1998. Afkoma nokkurra jökla á Íslandi 1992–1997. Unn- ið fyrir auðlindadeild Orkustofnunar, Reykjavík. Orkustofnun, OS-98082. Oddur Sigurðsson, Þorsteinn Þorsteinsson, Stefán Már Ágústsson og Bergur Einarsson. Afkoma Hofs- jökuls 1997–2004. Orkustofnun, Vatnamælingar OS- 2004/029, 54 s. JÖKULL No. 56, 2006 91
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Jökull

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