The head - turning decline in sea ice in 2007, for example, was caused mainly by sunny skies and a prolonged dipole: high pressures over the Beaufort Sea, combined with lows near Siberia, pulled in considerable warmth from the Pacific side and
increased ice export to the Atlantic.
At the workshop and from recent publications, there is near consensus that the 2007 sea ice minimum was due to the combination of almost two decades of preconditioning (thinning and
increased ice export) plus a rare supportive weather pattern in summer 2007.
The absence of anomalous features evident in 2007 in SLP and stratospheric and surface winds in spring in 2011 indicates that accelerated decline associated with the former will not be an artifact of dynamical phenomena, although a thinner and more mobile ice cover may lower the wind forcing threshold required for
increased ice export.
The roughly factor of two increase in speed shown is partly due to decreases in ice thickness and strength, but it is safe to predict that if cyclonic storm events like this one ending 2015 continue penetrating the eastern Arctic Ocean, they will
increase ice export and reduce summer 2016 ice extent.
Not exact matches
Increased export of grounded
ice after the collapse of northern Larsen Ice Shelf, Antarctic Peninsula, observed by Envisat ASAR, in Igarss: 2007 Ieee International Geoscience and Remote Sensing Symposium, Vols 1 - 12 — Sensing and Understanding Our Plan
ice after the collapse of northern Larsen
Ice Shelf, Antarctic Peninsula, observed by Envisat ASAR, in Igarss: 2007 Ieee International Geoscience and Remote Sensing Symposium, Vols 1 - 12 — Sensing and Understanding Our Plan
Ice Shelf, Antarctic Peninsula, observed by Envisat ASAR, in Igarss: 2007 Ieee International Geoscience and Remote Sensing Symposium, Vols 1 - 12 — Sensing and Understanding Our Planet.
It's worth bearing in mind that despite the
increase in area
export, volume
export through Fram shows no trend, e.g. Spreen et al: http://soa.arcus.org/abstracts/fram-strait-sea-
ice-volume-
export-estimated-between-2003-and-2008-satellite-data This is because the
ice being
exported has thinned even as area
export has
increased.
Long - term changes in atmospheric circulation have resulted in an
increased amount of perennial sea
ice being
exported through Fram Strait rather than being recirculated (e.g., Beaufort Gyre); this was what set up the 2007 record September minimum.
Another side effect of the high pressure has been
increased export of sea
ice from the Central Arctic, as illustrated by this animation from «Wipneus» on the Arctic Sea Ice For
ice from the Central Arctic, as illustrated by this animation from «Wipneus» on the Arctic Sea
Ice For
Ice Forum:
The subsequent
increase in multiyear sea
ice culminated during the past 2500 years and is linked to an
increase in
ice export from the western Arctic and higher variability of
ice - drift routes.