Sentences with phrase «decreased sea ice cover»

Researchers have previously suggested that extreme weather in the midlatitudes might be linked to climate change's impacts on the Arctic (SN Online: 12/2/11), particularly the dramatically decreased sea ice cover in the Arctic Ocean.

Not exact matches

«Northern Hemisphere snow cover has decreased and Arctic Sea ice has been at record low levels in the past three years.»

AWI researchers observed a considerable decrease in the thickness of the sea ice as early as the late summer of 2015, even though the overall ice covered area of the September minimum ultimately exceeded the record low of 2012 by approximately one million square kilometres.

Both the area of water covered by sea ice and the thickness of the ice have been decreasing in recent years, and thinner ice is blown farther and faster by the wind.

Consistent with observed changes in surface temperature, there has been an almost worldwide reduction in glacier and small ice cap (not including Antarctica and Greenland) mass and extent in the 20th century; snow cover has decreased in many regions of the Northern Hemisphere; sea ice extents have decreased in the Arctic, particularly in spring and summer (Chapter 4); the oceans are warming; and sea level is rising (Chapter 5).

Here is the title: «Future loss of Arctic sea - ice cover could drive a substantial decrease in California's rainfall ``.

Since IPCC (2001) the cryosphere has undergone significant changes, such as the substantial retreat of arctic sea ice, especially in summer; the continued shrinking of mountain glaciers; the decrease in the extent of snow cover and seasonally frozen ground, particularly in spring; the earlier breakup of river and lake ice; and widespread thinning of antarctic ice shelves along the Amundsen Sea coast, indicating increased basal melting due to increased ocean heat fluxes in the cavities below the ice shelvsea ice, especially in summer; the continued shrinking of mountain glaciers; the decrease in the extent of snow cover and seasonally frozen ground, particularly in spring; the earlier breakup of river and lake ice; and widespread thinning of antarctic ice shelves along the Amundsen Sea coast, indicating increased basal melting due to increased ocean heat fluxes in the cavities below the ice shelvSea coast, indicating increased basal melting due to increased ocean heat fluxes in the cavities below the ice shelves.

Furthermore, Prof. Slingo rejected data which shows a decline in Arctic sea ice volume of 75 % and also rejected the possibility that further decreases may cause an immediate collapse of ice cover.

The point here isn't that anybody can prove that there has never been this extent of Greenland melting at some prior time in the Holocene, but that all of these indicators taken together (Arctic temperatures, low sea ice extent in summer * and * winter, permafrost melting, decreased snow cover, Greenland melting) indicate that the Arctic as a whole really is warming in an exceptional way.

That was due to increased global moisture content, decreased global average cloud cover and decreased sea ice extent at high latitudes.

Re 9 wili — I know of a paper suggesting, as I recall, that enhanced «backradiation» (downward radiation reaching the surface emitted by the air / clouds) contributed more to Arctic amplification specifically in the cold part of the year (just to be clear, backradiation should generally increase with any warming (aside from greenhouse feedbacks) and more so with a warming due to an increase in the greenhouse effect (including feedbacks like water vapor and, if positive, clouds, though regional changes in water vapor and clouds can go against the global trend); otherwise it was always my understanding that the albedo feedback was key (while sea ice decreases so far have been more a summer phenomenon (when it would be warmer to begin with), the heat capacity of the sea prevents much temperature response, but there is a greater build up of heat from the albedo feedback, and this is released in the cold part of the year when ice forms later or would have formed or would have been thicker; the seasonal effect of reduced winter snow cover decreasing at those latitudes which still recieve sunlight in the winter would not be so delayed).

As I expect kim will comment about the coming Ice Age, please note that the Arctic sea ice is at just about the same point it was this time last year; however, the area covered by snow in Asia has decreased substantialIce Age, please note that the Arctic sea ice is at just about the same point it was this time last year; however, the area covered by snow in Asia has decreased substantialice is at just about the same point it was this time last year; however, the area covered by snow in Asia has decreased substantially.

As summer sea ice in the Arctic decreases, the snow / ice cover changes to open ocean, the amount of sunlight that is reflected drops from 80 - 90 % to about 20 %.

The end of the first half of the Holocene — between about 5 and 4 ka — was punctuated by rapid events at various latitudes, such as an abrupt increase in NH sea ice cover (Jennings et al., 2001); a decrease in Greenland deuterium excess, reflecting a change in the hydrological cycle (Masson - Delmotte et al., 2005b); abrupt cooling events in European climate (Seppa and Birks, 2001; Lauritzen, 2003); widespread North American drought for centuries (Booth et al., 2005); and changes in South American climate (Marchant and Hooghiemstra, 2004).

A 1 % decrease in cloud cover has a slightly higher radiative effect as all the observed loss of Arctic sea ice to date has had.

(Ramanathan and Inamdar 1989) So a 1 % decrease in cloud cover has a slightly higher radiative effect as all the observed loss of Arctic sea ice to date has had.

Ever since satellites allowed a detailed view of the Arctic and its ice, a pronounced decrease in summer sea ice cover has been observed (with this year setting a new record low).

The 2009 State of the Climate Report of the US National Oceanic and Atmospheric Administration (NOAA) tells us that climate change is real because of rising surface air temperatures since 1880 over land and the ocean, ocean acidification, sea level rise, glaciers melting, rising specific humidity, ocean heat content increasing, sea ice retreating, glaciers diminishing, Northern Hemisphere snow cover decreasing, and so many other lines of evidence.

Future loss of Arctic sea - ice cover could drive a substantial decrease in California's rainfall... — coauthored by Benjamin D. Santer

3) The extent and duration of snow cover and sea ice have decreased across the Arctic.

For example, ice cover in the Bellingshausen Sea has been decreasing while ice in the nearby Ross Sea is growing.

If cloud cover increases as sea ice decreases, that could offset the direct effect of the SIAF, especially if clouds increase in summer, when there is the most sun and the most sea - ice loss.

Perhaps the most significant change is the diminishing sea ice cover, which is decreasing more rapidly than model predictions [Stroeve et al., 2007].

Thus, the observed decreases in the Arctic sea - ice cover, especially in summer, may continue largely unabated as the GHG signal strengthens further»

The evidence for rapid climate change is compelling: Sea level rise, Global temperature rise, Warming oceans, Shrinking ice sheets, Declining Arctic sea ice, Glacial retreat, Extreme events, Ocean acidification, Decreased snow cover http://climate.nasa.gov/evidence/ It's changing «rapidly&raquSea level rise, Global temperature rise, Warming oceans, Shrinking ice sheets, Declining Arctic sea ice, Glacial retreat, Extreme events, Ocean acidification, Decreased snow cover http://climate.nasa.gov/evidence/ It's changing «rapidly&raqusea ice, Glacial retreat, Extreme events, Ocean acidification, Decreased snow cover http://climate.nasa.gov/evidence/ It's changing «rapidly».

Another difference is that in 2013 there were areas of decreased concentration north of the Kara and Barents sea; this year, most of the Arctic sea ice prevails at higher concentrations, indicating a more consolidated and possibly thicker ice cover, which is more resilient to melt and retreat.

Over the last two decades, the Greenland and Antarctic ice sheets have been losing mass, glaciers have continued to shrink almost worldwide, and Arctic sea ice and Northern Hemisphere spring snow cover have continued to decrease in extent.

(4) The rapid decrease of summer sea - ice cover allows increasing numbers of killer whales to use the Canadian High Arctic as a hunting ground.

The video shows so many different processes at different scales, from natural processes (annual changes in snow cover and the Vatnajökull ash plume) to climate change related changes (e.g. the long term decrease in sea ice).

For example, reductions in seasonal sea ice cover and higher surface temperatures may open up new habitat in polar regions for some important fish species, such as cod, herring, and pollock.128 However, continued presence of cold bottom - water temperatures on the Alaskan continental shelf could limit northward migration into the northern Bering Sea and Chukchi Sea off northwestern Alaska.129, 130 In addition, warming may cause reductions in the abundance of some species, such as pollock, in their current ranges in the Bering Sea131and reduce the health of juvenile sockeye salmon, potentially resulting in decreased overwinter survival.132 If ocean warming continues, it is unlikely that current fishing pressure on pollock can be sustained.133 Higher temperatures are also likely to increase the frequency of early Chinook salmon migrations, making management of the fishery by multiple user groups more challenging.sea ice cover and higher surface temperatures may open up new habitat in polar regions for some important fish species, such as cod, herring, and pollock.128 However, continued presence of cold bottom - water temperatures on the Alaskan continental shelf could limit northward migration into the northern Bering Sea and Chukchi Sea off northwestern Alaska.129, 130 In addition, warming may cause reductions in the abundance of some species, such as pollock, in their current ranges in the Bering Sea131and reduce the health of juvenile sockeye salmon, potentially resulting in decreased overwinter survival.132 If ocean warming continues, it is unlikely that current fishing pressure on pollock can be sustained.133 Higher temperatures are also likely to increase the frequency of early Chinook salmon migrations, making management of the fishery by multiple user groups more challenging.Sea and Chukchi Sea off northwestern Alaska.129, 130 In addition, warming may cause reductions in the abundance of some species, such as pollock, in their current ranges in the Bering Sea131and reduce the health of juvenile sockeye salmon, potentially resulting in decreased overwinter survival.132 If ocean warming continues, it is unlikely that current fishing pressure on pollock can be sustained.133 Higher temperatures are also likely to increase the frequency of early Chinook salmon migrations, making management of the fishery by multiple user groups more challenging.Sea off northwestern Alaska.129, 130 In addition, warming may cause reductions in the abundance of some species, such as pollock, in their current ranges in the Bering Sea131and reduce the health of juvenile sockeye salmon, potentially resulting in decreased overwinter survival.132 If ocean warming continues, it is unlikely that current fishing pressure on pollock can be sustained.133 Higher temperatures are also likely to increase the frequency of early Chinook salmon migrations, making management of the fishery by multiple user groups more challenging.Sea131and reduce the health of juvenile sockeye salmon, potentially resulting in decreased overwinter survival.132 If ocean warming continues, it is unlikely that current fishing pressure on pollock can be sustained.133 Higher temperatures are also likely to increase the frequency of early Chinook salmon migrations, making management of the fishery by multiple user groups more challenging.134

The evidence for AGW covers a number of areas: increases in CO2 levels, overall warming, a rise in sea levels, falls in snow cover, receding glaciers, a decrease in Arctic ice, earlier springs, treelines moving towards the poles.

These trends in extreme weather events are accompanied by longer - term changes as well, including surface and ocean temperature increase over recent decades, snow and ice cover decrease and sea level rise.

Population increase of polar bears on Svalbard and decrease in sea - ice cover in the Arctic region during summer probably results in more frequent interactions with reindeer on the archipelago.

For example, the lower atmosphere and the upper layers of the ocean have also warmed, snow and ice cover are decreasing in the Northern Hemisphere, the Greenland ice sheet is shrinking, and sea level is rising (see Figure 1b).

There is some evidence that the Arctic sea - ice cover has decreased about 6 % during the last two decades, and that the mean ice thickness has decreased as well.

For example, additional evidence of a warming trend can be found in the dramatic decrease in the extent of Arctic sea ice at its summer minimum (which occurs in September), decrease in spring snow cover in the Northern Hemisphere, increases in the global average upper ocean (upper 700 m or 2300 feet) heat content (shown relative to the 1955 — 2006 average), and in sea - level rise.

GMT drops initially at glacial inception in response to decreased summer radiation at high northern latitudes that would have led to equatorward extension of sea ice and snow cover with associated cooling from increased albedo.

From 1978 to 1996, the average ice cover around Antarctica showed almost no trend (a slight increase 1.3 % per decade), however ice decreased by 2.9 % per decade on average over the arctic seas (1).

Decrease in sea ice and snow cover are the prime causes, energy being used to melt ice and warm the ocean surface waters.

«The Arctic sea ice cover continues to be in a decreasing trend and this is connected to the ongoing warming of the Arctic,» said Claire Parkinson, a senior climate scientist at the NASA Goddard Space Flight Center.

How much it has grown is not stated in the paper: «Observational determination of albedo decrease caused by vanishing Arctic sea ice» http://eisenman.ucsd.edu/publications/Pistone-Eisenman-Ramanathan-2014.pdf but it seems very clear that Arctic sea - ice loss is in accelerating decline towards zero in the coming decades, meaning that this forcing will rise very substantially along with those from land - ice and snow cover decline.

«It is very likely that there will be continued loss of sea ice extent in the Arctic, decreases of snow cover, and reductions of permafrost at high latitudes of the Northern Hemisphere by 2016 — 2035.

Beyond affecting the humans and wildlife that call the area home, the Arctic's warmer temperatures and decreases in permafrost, snow cover, glaciers and sea ice also have wide - ranging consequences for the physical and biological systems in other parts of the world.

The time constants of albedo feedback from melting N America snow cover are shorter than the albedo feedback from melting Arctic sea ice, and the sea ice is changing response as its average thickness decreases, and the ratios of 1, 2, 3, 4, 5 year ice area changes.

What's more, they continue to ignore the broader, more important problem with Will's discussion of sea ice: the facts that picking out two days from a thirty - year time series is not a meaningful way to look at climate trends, and that climate models do not, in fact, lead you to expect a decrease in global ice cover.

Arctic sea ice, Antarctic and Greenland ice sheets, global glacier mass, permafrost area, and Northern Hemisphere snow cover are all decreasing substantially, while ocean surface temperatures, sea level, and ocean acidification are rising [36].

MOSCOW (Sputnik)-- The Antarctic sea ice cover has shrunk by almost a quarter, as as the Arctic sea ice cap decreased by almost 8 percent.

AR4 Chp 10 pp750 «As the climate warms, snow cover and sea ice extent decrease».

Further, there has been an almost worldwide reduction in glacial mass and extent in the 20th century; melting of the Greenland Ice Sheet has recently become apparent; snow cover has decreased in many Northern Hemisphere regions; sea ice thickness and extent have decreased in the Arctic in all seasons, most dramatically in spring and summer; the oceans are warming; and sea level is rising due to thermal expansion of the oceans and melting of land Ice Sheet has recently become apparent; snow cover has decreased in many Northern Hemisphere regions; sea ice thickness and extent have decreased in the Arctic in all seasons, most dramatically in spring and summer; the oceans are warming; and sea level is rising due to thermal expansion of the oceans and melting of land ice thickness and extent have decreased in the Arctic in all seasons, most dramatically in spring and summer; the oceans are warming; and sea level is rising due to thermal expansion of the oceans and melting of land iceice