Sentences with phrase «extent of sea ice»

It is important to understand that the maximum extent of sea ice during the winter is a less important climatic indicator than the minimum extent in summer.

Despite an especially warm winter, the current extent of sea ice does not represent a new record low; nevertheless, the amount of ice loss is massive.

In late summer (February - March) the areal extent of sea ice around Antarctica is about 4 106 km2.

Intervals of sustained low extent of sea ice cover occurred before AD 1200, and may be coincident with the so - called Medieval Warm Optimum (roughly AD 800 — 1300) attested in numerous Northern Hemisphere proxy records18, but the pre-industrial minimum occurred before, at about AD 640 (T3 in Fig. 3).

The consolidated database shows that there is no precedent as far back as 1850 for the 21st century's minimum ice extent of sea ice on the pan-Arctic scale....

Assuming that the Day of Year axis represents a normal western calender, the areal extent of sea ice seems to fall to a minimum during the Antarctic summer, with a much smaller dip during the Arctic summer.

New University of Colorado at Boulder calculations indicate the record low minimum extent of sea ice across the Arctic last September has a three - in - five chance of being shattered again in 2008 because of continued warming temperatures and a preponderance of younger, thinner ice.

Their data set of 500,000 square meters is the most comprehensive ever published, but is dwarfed by the total extent of the sea ice, which averages nearly 20 million square kilometers at its annual maximum.

A: The National Snow and Ice Data Center (NSIDC) announced this week that the sea ice surrounding Antarctica reached its maximum extent — its widest halo around the continent — in 2014 on 22 September: more than 20 million square kilometers, which also set a record for the highest extent of sea ice around the continent since satellite measurements began in the late 1970s.

And variations in the thickness and extent of sea ice cloaking the Arctic Ocean are driven by yet another set of complicating factors, ranging from long - term shifts in atmospheric pressure patterns to events as close - focus as the potent Arctic superstorm I reported on earlier this month.

As reported at Science Daily, in a new paper in Quaternary Science Reviews they report their findings: that the present extent of sea ice in the arctic is at its lowest for at least several thousand years.

Indeed the northward extent of sea ice had varied from 400 to 150 kilometers away from the colony, but the Emperor's breeding success and survival depends solely on access to the open waters within the ice such as «polynya» and «leads.»

He discovered that in the Nordic Seas, the maximum extent of sea ice (April) has decreased around 33 % since 1864, much of that before 1940, demonstrating that sea - ice reduction is not a new phenomena, but began long ago.

Major problems with the concept of the event 8200 years ago include; the rate at which it occurred; the much greater extent of sea ice the freshwater would create; but a big problem is the volume of water involved.

Exceptionally warm winter temperatures can affect the re-growth, and October 2016 — January 2017 saw the lowest daily extent of sea ice in record, likely due to record warm temperatures in the Arctic.

By late winter (August - September), the typical extent of sea ice around Antarctica is about 19 106 km2, i.e. more than twice the area of Australia, and more than the area of Arctic sea ice.

However, the exact timing and extent of sea ice formation and continental glaciation in the Arctic during the Pliocene remains uncertain (Zachos et al., 2008).

But a similar story is also being told in the Antarctic, where a record extent of sea ice in 2014 has this year reversed:

We know the the areal extent of sea ice is an important measure of the degree of cold in the Arctic Ocean / sea ice subsystem of Earth's climate but is it not true that even if areal extent was to increase the amount of ice could still be much decreased?

The Arctic regularly reaches ever smaller extents of end - of - summer minimum extents of sea ice.

The CSU - led research team offers important details on how the Southern Annular Mode affects storm activity and the extent of sea ice surrounding the Antarctic Peninsula.

Now, a new study led by Colorado State University provides important details on the extent of sea ice, which can protect ice shelves from the impacts of ocean storms, in the Antarctic Peninsula.

The algorithm allowed the team to compare the extent of sea ice over the whole period from 1978 to 1994.

Satellites first began measuring the extent of sea ice in the Arctic Ocean during the 1970s.

The extent of sea ice cover in Arctic was much less than it is today between four and five million years ago.

By the late 1990s, the extent of sea ice had fallen to its lowest level for at least 1400 years.

The continued reduction in the extent of sea ice in the Arctic is expected to lead to increased photosynthetic primary production and POC flux there (Jones et al., 2014), which could benefit fauna whose energetic demands increase as a result of ocean acidification (e.g., calcifying taxa).

The Arctic is now so warm that the extent of sea ice has decreased by about 30 pct.

As the extent of the sea ice declines, energy from the sun that would have been reflected away is instead absorbed by the ocean.

Sea ice data prior to the satellite data is severely lacking, such that these types of attempts are used to recreate the extent of the sea ice as best we can.

There's much more in the piece, including Morison's prediction of the extent of the sea ice retreat in late summer.

# 51 — Dan, I respectfully disagree with your comment that «these types of attempts are used to recreate the extent of the sea ice as best we can.»

Check out the difference in extent of most mountain glaciers compared to 30 years ago, or the extent of sea ice in the arctic ocmpared to a few decades ago.There are many manifestations all around us.

Maue discussed how «two camps» of researchers claim to have increased predictability of such weather events over periods of a month or more by using clues either in the Arctic, related to the extent of sea ice and snow cover, or in the temperature of surface waters across the Pacific Ocean.

The letter noted that the sharp recent reduction in the extent of sea ice, and particularly thick older sea ice, was far outpacing what had been projected by computer simulations.

And projections show the extent of sea ice during the spring breeding season changing relatively little well into this century.

Despite what has appeared to be a big early dip in the extent of sea ice on the Arctic Ocean this spring, a suite of forecasts issued today by the leading teams studying shifting conditions around the North Pole mostly do not (quite) see a repeat of the extraordinary ice pullback in 2007.

Also, there is a corresponding non-linearity associated with change in the distribution and extent of sea ice.

We might learn more from looking more closely at the descent of White and his kind from «progressive» to authoritarian than we might from looking at charts depicting the extent of sea ice in the poles.

Even though the Antarctic ice sheet is losing mass, the extent of sea ice around the coast of the continent has grown slightly.