Jökull - 01.01.2012, Page 4

and rapid thinning of the glacier front during recent
decades. Based on radio-echo soundings of the ice-
covered Öræfajökull volcano, Magnússon et al. cal-
culate ice volumes and provide a view of the bedrock
topography and subglacial troughs that might act as
routes of potential jökulhlaups during future erup-
tions. Brynjólfsson et al. provide a new model for the
geomorphological fingerprinting of surge-type cirque
glaciers based on two examples in North-Iceland,
and Benediktsson discusses the polyphase structural
evolution of conspicuous end moraines formed in
Kringilsárrani during the last day of the 1890 surge
of Brúarjökull.
This special issue has been prepared not only in
memory of Sigurður Þórarinsson, but also in connec-
tion with two international events held in Iceland in
2012 that were dedicated to Sigurður and focused, in
particular, on his tephrochronological legacy; the 30th
Nordic Geological Winter Meeting in Reykjavík and
the Nordvulk Summer School on Tephra Studies in
Leirubakki and Kirkjubæjarklaustur.
We thank the authors and the journal’s review-
ers for their contribution, the editors of Jökull and
the publishers, Iceland Glaciological Society and the
Geoscience Society of Iceland, for supporting the
publication of this special issue. Financial support
from the Institute of Earth Sciences and the Rector
of the University of Iceland, the Icelandic Institute of
Natural History, and the Icelandic Road Administra-
tion is also gratefully acknowledged.
Ívar Örn Benediktsson, Helgi Björnsson,
Guðrún Larsen and Olgeir Sigmarsson.
2 JÖKULL No. 62, 2012