Sentences with phrase «current sea ice decline»

However, this actually contradicts John Christy's argument that the current sea ice decline could be natural, because that long - term orbital forcing has not reversed, and thus can not account for the sudden and rapid Arctic warming and concurrent sea ice decline.

Not exact matches

While, perhaps it wasn't as extensive as it was in 2007, sea ice declines back then seem to have been underestimated (or neglected) in current conversations.

The International Conservation Union, in its latest red list of endangered wildlife, gave polar bears threatened status in May, projecting a decline of 30 percent by midcentury from current populations, mainly due to projected losses of sea ice in a warming world.

In fact, although climate models predict that Arctic sea ice will decline in response to greenhouse gas increases, the current pace of retreat at the end of the melt season is exceeding the models» forecasts by around a factor of 3 (Stroeve 2007).

The explanation of the that «incongruous» sea ice decline is very simple: Arctic warming is not caused by an imaginary AGW but by warm Gulf Stream water carried into the Arctic Ocean by North Atlantic currents.

-- It would explain not only the current decline in Arctic sea ice, but also earlier periods of decline and recovery (which are not explained by the AGW attribution).

«If sea ice declines at the rates projected by the IPCC climate models, and continues to influence emperor penguins as it did in the second half of the 20th century in Terre Adélie, at least two - thirds of the colonies are projected to have declined by greater than 50 % from their current size by 2100,» Dr Jenouvrier said.

I fear that many hidden tripping points have already been passed eg increase in disease, demise of soil micro-organisms, slowing down of oceanic currents, melting ice, sea level rise, decline of aquatic food chains.

Even simply measuring net flux of energy into the Arctic via ocean currents from record high OHC would call into serious question the possibility that the long term decline in Arctic sea ice would reverse or «revert to the mean».

Given the extreme low current sea ice extent and the positive SST anomalies, a stronger decline might be expected.

This report discusses our current understanding of the mechanisms that link declines in Arctic sea ice cover, loss of high - latitude snow cover, changes in Arctic - region energy fluxes, atmospheric circulation patterns, and the occurrence of extreme weather events; possible implications of more severe loss of summer Arctic sea ice upon weather patterns at lower latitudes; major gaps in our understanding, and observational and / or modeling efforts that are needed to fill those gaps; and current opportunities and limitations for using Arctic sea ice predictions to assess the risk of temperature / precipitation anomalies and extreme weather events over northern continents.

As far as current global observations are concerned, Hansen cites both the decline of Arctic sea ice and the worldwide retreat of mountain glaciers as causes for major concern.

Global temperature has declined despite increasing in CO2; sea ice extent has increased and understanding of the role of wind and currents in ice formation and movement have improved.

Finally, given the measured a increase in advection of energy to the Arctic via ocean currents, the increase in energy of the oceans should be expected to have the exact effect we are seeing with a rapidly declining Arctic Sea ice volume, with a great deal of this happening from ice being melted from underneath.

The paper concluded that «current climate models are still quite poor at modelling past sea ice trends» after including a graph showing a decline in sea ice starting at the beginning of the «satellite era» in 1979.