Pohjola, V. (2007); „Arctic
Warming – a Perspective from
Global Change News Letter, No. 69, p. 9
Here presented : 04th February 2009
paper provides an indication that
the annual average (Feb-Jan, 5-year series) at Spitsbergen increased
from about 1918/19 to 1921/22 by four degree, but that the trend from
the 1930s to the mid 1990s showed a general cooling, contrary to a
warming over the whole century. With these facts at hand it seems
strange when the paper says:
the IPCC report released
during 2007 the scientific community is adding confidence to the
relation between global warming and the boost of the greenhouse effect
via anthropogenic emissions.
Modelling work after the
previous IPCC report have shown that the Arctic region is likely to
warm up faster than the global average, and that the Arctic may be one
of the regions to have the quickest response to global
reason for this Arctic warming
is debated, but was likely an effect of enhanced atmospheric circulation
triggered by heat excess in its source region.
Dec. to Feb.
__1918/19 = -10,1°C
RIGHT: Annual mean
North Atlantic drift is a powerful
contributor of heat into the Nordic Seas and furtherinto the Arctic
Ocean, where the northern branch of the drift splits at Svalbard.
can such a high rise in winter occurwhen the location is almost enclosed by
One of the
“hotspots” in this Arctic warming may be Svalbard,
due to the fact that this archipelago is positioned right where the
Arctic front separates the polar and extra-tropical air and water
How well the Svalbard region senses
global climatic variability is exemplified by the much larger warming
the archipelago experienced in the 1920–30s event than what
was recorded at other North Atlantic/Arctic sites.