Sentences with phrase «sea ice area over»

Here's a link to a graph of global sea ice area over the past 30 years.

Not exact matches

Due to global warming, larger and larger areas of sea ice melt in the summer and when sea ice freezes over in the winter it is thinner and more reduced.

«For the first time, we've been able to use a special net directly below the sea ice to catch a large number of polar cod, and therefore to estimate their prevalence over a large area.

The slipperiness, caused by films of water spread over large areas, helps ascertain how quickly a melting ice sheet will slide into the sea as the climate warms — and thus how quickly sea levels will rise.

The global climate models do a good job of simulating the process of sea ice formation over large areas in the open ocean.

During winter, each pump would be capable of building an additional layer of sea ice up to 1 meter thick over an area of about 100,000 square meters, or about the size of 15 soccer fields, the researchers estimate in the January issue of Earth's Future.

In Antarctica, even though as a whole it's slightly gaining in sea ice cover, most of these gains are over unproductive, deep - lying seabeds, whereas the newly ice - free areas are mostly located over highly productive continental shelves in the West Antarctic.

Paul D... As a part - time alarmist I would answer that with a little bit of extrapolation added to some warnings of climate scientists I guess the worst case scenario at least includes the total collapse of the WAIS, creating tsunamis at least all over the Pacific rim, the subsequent sea level rise of c. 7m will destroy most of the remaining harbours, communication centers near coasts, next up would be the melting of the collapsed ice in the southern ocean altering the climate of the entire southern hemisphere, making it near - impossible to guess what areas are good for similar agriculture as before, leading to massive movements of people.

This study proposes a mechanism sustaining the enhanced westerly winds by a cyclonic atmospheric circulation in the Barents Sea region created by a strong surface heat flux over the ice - free areas.

Alarmed at the pace of change to our Earth caused by human - induced climate change, including accelerating melting and loss of ice from Greenland, the Himalayas and Antarctica, acidification of the world's oceans due to rising CO2 concentrations, increasingly intense tropical cyclones, more damaging and intense drought and floods, including glacial lakes outburst loods, in many regions and higher levels of sea - level rise than estimated just a few years ago, risks changing the face of the planet and threatening coastal cities, low lying areas, mountainous regions and vulnerable countries the world over,

Satellite observations made from 1979 to 2016 show that the annual sea ice season in the greater Station Obama area has become 3 - 4 months shorter over the last 38 years.

Meantime, per Cryosphere, the Global Sea Ice Area fell by over 1 million km in a matter of about 5 days.

[4] The area of summer sea ice lost since the 1980s would cover over 40 percent of the contiguous United States.

The vulnerable nations declared that they are, «Alarmed at the pace of change to our Earth caused by human - induced climate change, including accelerating melting and loss of ice from Greenland, the Himalayas and Antarctica, acidification of the world's oceans due to rising CO2 concentrations, increasingly intense tropical cyclones, more damaging and intense drought and floods, including Glacial Lakes Outburst Floods, in many regions and higher levels of sea - level rise than estimated just a few years ago, risks changing the face of the planet and threatening coastal cities, low lying areas, mountainous regions and vulnerable countries the world over...»

The September ice area is predicted to be comparable to 2009 based on winter (Jan - Feb - Mar) sea level pressure anomalies over the Kara and Laptev Seas.

Then it said «If the general positive trend in Atlantic heat input remains, winter cooling will likely be insufficient to produce ice over an increasing area, leading to further «Atlantification» of the Barents Sea.»

As evident in the figures the near surface air temperatures are actually warmer over the Arctic Ocean (by over 1 °C in large areas) when the sea ice absorbs solar radiation and transfers some of this energy as sensible heat back into the atmosphere.

If you correct for the discontinuity in the way area is measured, it's undeniable that global sea ice has trended down over the time span monitored by satellites.

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.

They applied a new method that fills in missing temperatures over sea ice by combining satellite data for missing areas with a method known as «kriging,» which calculates missing data by checking nearby temperature station readings.

From that link's words, the DMI «green line» IS the best way to consistently compare the daily estimate of NORTH areas of the arctic — those areas north of 70 latitude to 83 north latitude NASA - GISS extrapolates «surface» ground - based temperatures as far as 1200 km from where their land - based measurements were made from 60 - 70 latitude over the ever - greening (and darker) tundra and forests OUT to the open sea where where the arctic sea ice actually is present.

Will much of this ice remain in the central basin to rebuild the area of old, perennial sea ice over the coming years?

Currently when the sea ice area recovers quickly is simply apportioned to colder temperatures taking over.

«In previous summers, some of the [multi-year ice] migrated over to the Alaska and Siberia areas where it melted,» Dr. Don Perovich, a sea - ice expert at Dartmouth College, told BBC News.

The first graph on global sea ice area uses an expanded scale in an attempt to hide the fact that indeed, there's a declining trend (caption «no trend over 30 years»).

Arctic «sea ice extent has varied naturally over the decades with some Russian data suggesting similar or even greater ice loss in some local areas in the 1930s» — Analysis of Arctic ice: «Russian data shows that the [Arctic] ice was just as thin in 1940 as it is now.

If northern Siberia does not heat up, then the necessary depressions may not form in the northern part of the Urals and the coming melting season could look more like 2007 and 2012 with significant high pressure areas over the sea ice during summer months.

The area of Arctic sea ice was nearly 30 % greater in August than a year ago, according to recent satellite data, though projections based on longer - term trends suggest the sea ice will continue its decline over time.

But the sea ice has become noticeably thinner, and smaller in surface area, over the last 40 years.

This idea is partially supported by the result that the ABS sea ice area timeseries explains somewhat more temperature change over West Antarctica than do the PCs of geopotential height.

Anomolous global sea ice area would seem to be over a million square kilometers below the 1979 - 2000 mean... hmmm and continuing lack of sunspots should mean lower global temperatures... hmmm

One thing that has fascinated me, in my study of sea - ice, is how swiftly vast areas can freeze over.

https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/asl2.423 «In recent years, winter westerly winds over the Beaufort Sea and summer anticyclonic circulation over the Arctic toward the Fram Strait have contributed to accelerated decreases in sea ice over areas east of Europe and north of AlasSea and summer anticyclonic circulation over the Arctic toward the Fram Strait have contributed to accelerated decreases in sea ice over areas east of Europe and north of Alassea ice over areas east of Europe and north of Alaska.

Based on the understanding of both the physical processes that control key climate feedbacks (see Section 8.6.3), and also the origin of inter-model differences in the simulation of feedbacks (see Section 8.6.2), the following climate characteristics appear to be particularly important: (i) for the water vapour and lapse rate feedbacks, the response of upper - tropospheric RH and lapse rate to interannual or decadal changes in climate; (ii) for cloud feedbacks, the response of boundary - layer clouds and anvil clouds to a change in surface or atmospheric conditions and the change in cloud radiative properties associated with a change in extratropical synoptic weather systems; (iii) for snow albedo feedbacks, the relationship between surface air temperature and snow melt over northern land areas during spring and (iv) for sea ice feedbacks, the simulation of sea ice thickness.

Is there a well referenced article (from you or others) that deacribes the likely evolution of Arctic sea ice over the past two thousand years in chronological order, which, as far as possible, refers to the geographic areas that melted / expanded?.

Some will say that heating will naturally increase desert areas and lack of water however, all that melting ice and snow will raise sea levels over centuries causing disruption but it is much more likely that the environment would get wetter in general everywhere.

The radar readings from both teams show that the grounding line for some areas of the West Antarctic Ice Sheet has retreated by as much as 20 miles (37 kilometers) over the past couple of decades, apparently due to the interaction with warmer seas.

Historically, lack of satellite data directly over the North Pole has not concerned scientists; they have always assumed that the area underneath is covered with sea ice.

A recent study on the North Pacific circulation patterns over the past 1.2 million years determined that sea ice on coastal areas can be an important factor in ocean circulation, therefore influencing climate at global and regional levels.

Microwave imagery must allow for variations in surface emissivity and can not act as a surrogate for air temperature over either snow - covered (Peterson et al., 2000) or sea - ice areas.

The observed effects of cryosphere reduction include modification of river regimes due to enhanced glacial melt, snowmelt advance and enhanced winter base flow; formation of thermokarst terrain and disappearance of surface lakes in thawing permafrost; decrease in potential travel days of vehicles over frozen roads in the Arctic; enhanced potential for glacier hazards and slope instability due to mechanical weakening driven by ice and permafrost melting; regional ocean freshening; sea - level rise due to glacier and ice sheet shrinkage; biotic colonisation and faunal changes in deglaciated terrain; changes in freshwater and marine ecosystems affected by lake - ice and sea - ice reduction; changes in livelihoods; reduced tourism activities related to skiing, ice climbing and scenic activities in cryospheric areas affected by degradation; and increased ease of ship transportation in the Arctic.

Despite its areas of inaccuracy, near - real - time data are still useful for assessing changes in sea ice coverage, particularly when averaged over an entire month.

«The shift in storm tracks over North America was linked to the formation of these columns of warmer air over areas of reduced sea ice.»

In July, the Arctic Dipole Anomaly (DA) pattern that was dominant in June (which promotes clear skies, warm air temperatures, and winds that push ice away from coastal areas and encourages melt) was replaced by low sea level pressure (SLP) over the Arctic Ocean, leading to ice divergence (ice extent «spreading out») and cooler temperatures.