Sentences with phrase «decline in sea ice extent»

The period of strongly positive Arctic Oscillation during 1989 - 1995 and the loss of multi-year ice set the stage for the large decline in sea ice extent in the past decade.

JC says «There are three main theories for the recent decline in sea ice extent and volume,» gives the three, but gives no program for testing which theory is true.

Lukovich and Barber; 4.6 million square kilometers; Heuristic The absence of a distinctive transition in spring of 2009, between cyclonic and anti-cyclonic circulation in the stratosphere (characteristic of years with record lows in sea ice extent), suggests that dynamical contributions will contribute to but not accelerate the decline in sea ice extent in September 2009.

«There is no doubt that Arctic sea ice extent is trending downwards, with much of that multi-decadal decline in sea ice extent being due to human - induced climate change,» Hoerling told BuzzFeed News by email.

Ice divergence has spread the ice out, slowing the decline in sea ice extent during the first two weeks of July.

Not exact matches

«This shift is characterized by the persistent decline in the thickness and summer extent of sea - ice cover and by a warmer, l

Although researchers have been generally successful at modelling the huge declines in Arctic sea ice, the extent of Antarctic sea ice has actually increased in recent years, contrary to the predictions of models.

Through satellite images, researchers have observed a steep decline in the average extent of Arctic sea ice for every month of the year.

Observed decreases in arctic sea ice extent have been shown to be inconsistent with simulated internal variability, and consistent with the simulated response to human influence, but SH sea ice extent has not declined.

The presently low maximum sea ice extent in the Western Nordic Seas is unique over the last 800 years, and results from a sea ice decline started in late - nineteenth century after the Little Ice Age.&raqice extent in the Western Nordic Seas is unique over the last 800 years, and results from a sea ice decline started in late - nineteenth century after the Little Ice Age.&raqice decline started in late - nineteenth century after the Little Ice Age.&raqIce Age.»

Although there is still definitely a declining trend in Arctic sea ice (2009 and 2008 were still the second and third lowest sea ice extents, after 2007) there was a lot of hype surrounding the 2007 minimum even though that was partly just natural variability in the Arctic climate.

In the past three decades, the sea ice September extent has declined 40 %.

eg Graham explained that these warming events are related to the decline of winter sea ice in the Arctic, noting that January's ice extent was the lowest on record.

A recent paper by Francis & Hunter provides an interesting discussion about reasons for the recent decline in the Arctic sea - ice extent, based on new satellite observations.

Intuitively, one would think that model the underestimate of the decline in Arctic sea ice extent would also be reflected, at least partly, in an underestimate of Arctic temperature rise.

Using extent data up to 2010, they do not directly address the claim that the decline of extent in Arctic Sea Ice is linear vs the claim that it is accelerating.

All climate models tell us that it is the Arctic sea ice cover that declines first, and that Antarctic ice extent falls only later, and may even (as observed) temporarily increase in response to changing patterns of atmospheric circulation.

So, I was curious about your recent paper and whether there was any discussion of changes in the THC poleward of the GIS shelf vs the data from the RAPID program line located at 26.5 N. With the decline in minimum extent and volume of sea - ice, one might expect to see more THC sinking into the Arctic Ocean, with consequences for both climate and weather.

A graph of September Arctic sea ice extent (blue diamonds) with «recovery» years highlighted in red, versus the long - term sea ice decline fit with a second order polynomial, also in red.

Overall, sea ice extent declined at a slightly slower rate than normal (relative to the 1981 - 2010 average rate) during June (Figure 6), losing a total of 1.6 million km2 as noted in NSIDC's Arctic Sea Ice News and Analysis reposea ice extent declined at a slightly slower rate than normal (relative to the 1981 - 2010 average rate) during June (Figure 6), losing a total of 1.6 million km2 as noted in NSIDC's Arctic Sea Ice News and Analysis repoice extent declined at a slightly slower rate than normal (relative to the 1981 - 2010 average rate) during June (Figure 6), losing a total of 1.6 million km2 as noted in NSIDC's Arctic Sea Ice News and Analysis repoSea Ice News and Analysis repoIce News and Analysis report.

Though sea ice didn't melt as much in 2009 as it did in the previous two years, NSIDC scientists believe that the long - term decline in summer sea ice extent will continue.

Sea ice extent also continued its rapid decline with the Japanese Space Agency showing 4,800,000 square kilometers of sea ice extent, about equal to the third lowest measurement set in 20Sea ice extent also continued its rapid decline with the Japanese Space Agency showing 4,800,000 square kilometers of sea ice extent, about equal to the third lowest measurement set in 20sea ice extent, about equal to the third lowest measurement set in 2008.

Although the Arctic Ocean is typically mostly covered by ice, both the thickness and extent of summer sea ice in the Arctic have shown a dramatic decline over the past thirty years, satellite measurements have found.

NASA satellite data reveals how this year's minimum sea ice extent, reached on Sept. 9 as depicted here, declined to a level far smaller than the 30 - year average (in yellow) and opened up Northwest Passage shipping lanes (in red).

Most interpretations of the recent decline in Arctic sea ice extent have focused on the role of anthropogenic greenhouse gas forcing, with some allowance for natural variability.

As Stroeve et al. (2012) discuss, newer climate models have made some progress in this area, but still can not account for the full extent of the Arctic sea ice decline.

Stroeve et al. (2011) noted that in 2009 - 2010, the AO was in a state which should have resulted in a large sea ice extent; the fact that 2010 was a year of relatively low sea ice extent is indicative long - term human - caused sea ice decline.

Although July data indicated that the sea ice might be on track for a slight recovery from 2007 (though still well below «normal» climatological conditions), new sea ice data and weather forecasts show that total ice extent in early August declined at about twice the rate of any other time this summer.

Cycles of natural variability such as the Arctic Oscillation are known to play a role in Arctic sea ice extent, but the sharp decline seen in this decade can not be explained by natural variability alone.

NEW YORK — Arctic sea - ice extent shrank to an unprecedented low this summer, part of a long - term decline in the icy white cap over the far northern ocean.

In 2007, the extent of sea ice in the Arctic declined rapidlIn 2007, the extent of sea ice in the Arctic declined rapidlin the Arctic declined rapidly.

There is no explicit physical reasoning — the implicit assumption is that whatever factors drove the sea ice extent to decline approximately linearly during 10 Septembers between 1997 — 2006, will continue to operate in September 2008.

Arctic sea ice volume, area, and extent have been in long - term decline for decades, and this decline has accelerated over the past 5 years.

After a reaching its maximum extent unusually early and then following a period of relatively unchanging overall extent, Antarctic sea ice extent started to decline in earnest.

Not only does this low - pressure area, or cyclone, look bigger, more intense and longer - lasting than the one from last year, the ice also seems to be in a weaker state than ever, as evidenced by the fact that 2012 trend lines on both sea ice area and sea ice extent graphs track lower than previous record years, despite weather that until recently would completely stall the decline.

Recent trends in the decline of Arctic polar sea ice extent continued in 2016.

Animation of changes in average September sea ice extent from 1979 through 2016 — with noteworthy natural variability and a long - term decline.

However, the pace of decline returned to near - average rates by July, and the end - of - summer minimum sea ice extent, recorded on September 10, eventually tied for second lowest with 2007 (2012 remains the lowest in the satellite time series by more than 600,000 square kilometers or 232,000 square miles).

At the start of fall freeze - up, sea ice continues to be thinner and more mobile than prior to 2005, which might cause the decline in extent to persist or accelerate.

This reflects a December pattern of faster - than - average growth in the Arctic, and slightly slower - than average sea ice extent decline in the Southern Ocean.

«Regarded as one of the world's most productive marine environments, the Bering Sea is widely thought to be rapidly warming and losing sea ice... Results show that, rather than declining, mean annual sea ice extent in the Bering Sea has exhibited no significant change over the satellite sea ice record (1979 — 200Sea is widely thought to be rapidly warming and losing sea ice... Results show that, rather than declining, mean annual sea ice extent in the Bering Sea has exhibited no significant change over the satellite sea ice record (1979 — 200sea ice... Results show that, rather than declining, mean annual sea ice extent in the Bering Sea has exhibited no significant change over the satellite sea ice record (1979 — 200sea ice extent in the Bering Sea has exhibited no significant change over the satellite sea ice record (1979 — 200Sea has exhibited no significant change over the satellite sea ice record (1979 — 200sea ice record (1979 — 2009).

Global sea - ice extent has scarcely declined in that time.

Dramatic decline in Arctic sea ice extent over last week.

If this is correct, then the fact that the sea ice extent has been «declining since records began» (in 1979) doesn't mean that recent trends are unusual.

Anomalous cyclonic atmospheric circulation throughout the Arctic Basin during June has continued to precondition sea ice, making the ice cover vulnerable to a precipitous drop in sea ice extent; however the persistence of the June cyclonic circulation (and cloudiness associated with the surface lows) has induced divergence within the sea ice cover, and has delayed the onset of the rapid sea ice extent decline typically observed in June.

It is very likely that human activities have contributed to observed Arctic warming, sea ice loss, glacier mass loss, and a decline in snow extent in the Northern Hemisphere.

Arctic Sea Ice Decline: Projected Changes in Timing and Extent of Sea Ice in the Bering and Chukchi Seas: U.S. Geological Survey Open - File Report 2010 - 1176

Nearly all studies to date published in the peer - reviewed literature agree that summer Arctic sea ice extent is rapidly declining and that, if heat - trapping gas concentrations continue to rise, an essentially ice - free summer Arctic ocean will be realized before mid-century.

Arctic sea ice extent and thickness have declined substantially, especially in late summer (September), when there is now only about half as much sea ice as at the beginning of the satellite record in 1979 (Ch.

+ algal blooms in the Barents Sea + declining sea ice exteSea + declining sea ice extesea ice extent.