Sentences with phrase «term ice loss»

In more recent years, even as forecasts of global sea - level rise have been notched up, most projections have not taken into account the possibility of a significant, near - term ice loss from the West Antarctic.

Not exact matches

As glaciologist Richard Alley of Pennsylvania State University notes: «The ice sheet is losing mass, this loss has increased over time, [and] it is not the dominant term in sea - level rise — but it matters.»

In the case of Arctic whales, the changes in sea ice might benefit their populations, at least in the short term: the loss and earlier retreat of sea ice opens up new habitats and, in some areas of the Arctic, has also led to an increase in food production and the length of their feeding season.

It is quite possible that we are well past half - way — maybe at 75 % in terms of loss of arctic sea ice mass.

One year without a net loss also doesn't buck the long - term trend of Greenland losing ice, both from surface melt and from ocean waters eating away at glaciers that flow out to sea.

The motivation for this time series is to visualize the fact that the long term Arctic - wide loss of sea ice is not only happening in extent, which is well measured by satellites, but also in thickness, which isn't.

Nevertheless, some caution is in order in interpreting this to mean that current rates of rapid ice loss from West Antarctica represent a long term trend.

People need to know what will be the immediate, the short and medium term «Impacts» in people's lives as a result of that Arctic Sea Ice Loss — including the specific types of likely «Impacts» in the region in which those people actually live and work.

The long - term ice area loss from September of 1979 to September of 2007 was -10.7 %.

(BTW, their term for the observed loss, «sea ice withdrawal,» is rather interesting (euphemistic) in itself, isn't it?)

After finishing my post on the inevitability of substantial long - term sea - level rise from Antarctic ice loss, I sent this question to Curt Stager, a paleoclimatologist and author of «Deep Future,» Kim Stanley Robinson, the novelist focused on «cli fi» before that term was conceived, and the astrobiologist David Grinspoon:

Any change in a single year — no matter what the variable — can not generally be linked to climate change, although the ice losses in 2007 and 2008 would not have happened without the long - term warming and thinning of the ice cover.

But again the «models» estimate includes an observed ice sheet mass loss term of 0.41 mm / year whereas ice sheet models give a mass gain of 0.1 mm / year for this period; considering this, observed rise is again 50 % faster than the best model estimate for this period.

For example, recent results from the Met Office do show that there is a detectable human impact in the long - term decline in sea ice over the past 30 years, and all the evidence points to a complete loss of summer sea ice much later this century.

Here's how the summary put it: «The June 2010 Outlook indicates a continuation of the overall trend in long - term loss of summer Arctic sea ice, with no indication that a return to historical levels of the 1980s / 1990s will occur.»

I would also keep in mind the fact that we are only speaking of the short - term Charney Climate Sensitivity, and the long - term climate sensitivity is presumably going to be about twice that — due to ice sheet loss and the like.

So we see a long term trend of accelerating ice mass loss since the 1970s.

The long term trend since the 1970s is accelerating ice mass loss.

Finds that these losses in the oldest ice now extend into the central Arctic Ocean and adjacent to the Canadian Archipelago; areas where the ice cover was relatively stable prior to 2007 and where long ‐ term survival of sea ice through summer is considered to be most likely

In outline, the model supposes that the rate of change of ice extent has two terms - accumulation proportional to its length, and loss at the grounding line which is proportional to the cross-section area there, which because a constant width is assumed is proportional to the depth of the ice.

The one exception to this pattern of accelerating ice loss is Antarctic sea ice which has shown long term growth since satellites began measurements in 1979.

In 2010, a study using GRACE and Global Positioning System (GPS) measurements from three long - term sites on bedrock near the ice sheet found that the ice loss already documented over southern Greenland was spreading along the northwestern coast.

Its ice loss in 2003 was only 0.03 % of its total mass — well within long - term variability throughout its history.

We are seeing an increase in the recent speed of ice loss, when compared to the long - term ice - loss rate,» says lead researcher Whyjay Zheng, a doctoral student in geophysics at Cornell University.

When doing this with sea level data, as with OHC, as with tropospheric sensible heat, as with glacial ice mass loss, we are seeing a background, longer - term change that is non-linear, and for several decades now, accelerating.

Eight (8) respondents suggest a return toward the long - term trend line of summer sea ice loss (pre-2007 long - term trend of approximately 10 % loss per decade),

Five (5) respondents suggested a less dramatic loss than in 2007 (ie., 4.3 million square kilomoters)-- closer toward the long - term trend line of summer sea ice loss;

The spread of Outlook contributions suggests about a 29 % chance of reaching a new September sea ice minimum in 2010 and only an 18 % chance of an extent greater than the 2009 minimum (or a return to the long - term trend for summer sea ice loss).

The Arctic is experiencing a long - term loss of multi-year ice which is also accelerating.

The remaining estimates fall into «high» and «low» extent groupings: the low extent group with a range of 4.2 to 4.7 million square kilometers, representing a continued loss of sea ice extent compared to 2008/2009, and the high extent group of 5.4 to 5.7 million square kilometers, suggesting a return to the long - term trend for summer sea ice loss.

The drastic melt of 2007 remains the record loss of ice area in the satellite era, although subsequent years have still been below the long - term average.

A bit to the north, for example, on the flanks of Mount Kenya, other scientists have been able to measure shifts in patterns of ice loss that show solar radiation — the long - term influence on the ice — is no longer dominating.

«But this doesn't in any way contradict the long - term sea ice loss.»

There is high confidence that Arctic sea ice anomalies exhibit substantial interannual variability, so that ice loss or gain in any particular year can not be taken as an indication or absence of a long - term trend due to anthropogenic forcing.

«When you start looking at longer - term trends, 50 or 60 years, there's no escaping the loss of ice in the summer,» Kay said, telling LiveScience that «the long - term fate is basically sealed if we continue to increase greenhouse gas concentrations in the atmosphere.»

Three (3) respondents suggest a return toward the long term trend line of summer sea ice loss.

Five (5) respondents suggest a return toward the long term trend line of summer sea ice loss, but less than the 1979 - 2000 mean extents;

Reynolds, 5.15 (± 0.64), Statistical (same as June) The long - term loss of extent in summer is largely driven by volume decline of ice in the Arctic Ocean mediated by the resulting increase in open water formation efficiency.

Conclusion Planners and politicians are wise to focus upon concrete long - term trends (climate - warming, ice - loss, seal - level - rise, ocean acidification) and ill - advised to focus upon ephemeral short - term trends («snowpocalypses», «pauses», «climate-gate»)

As sea ice declines, it becomes thinner, with less ice build - up over multiple years, and therefore more vulnerable to further melting.15 Models that best match historical trends project northern waters that are virtually ice - free by late summer by the 2030s.25, 26,12 Within the general downward trend in sea ice, there will be time periods with both rapid ice loss and temporary recovery, 27 making it challenging to predict short - term changes in ice conditions.

These and other observations can be integrated into a model with feedbacks and having two unstable end ‐ points that is consistent both with classical studies of past climate states, and also with recent analysis of ice dynamics in the Arctic basin by Zhakarov, whose oscillatory model identifies feedback mechanisms in atmosphere and ocean, both positive and negative, that interact in such a manner as to prevent long ‐ term trends in either ice ‐ loss or ice ‐ gain on the Arctic Ocean to proceed to an ultimate state.

2) ice loss rates are debated at least in terms of the Antarctic http://hockeyschtick.blogspot.co.uk/2014/08/new-paper-finds-melt-rate-of-antarctic.html

Mean sea level (MSL) evolution has a direct impact on coastal areas and is a crucial index of climate change since it reflects both the amount of heat added in the ocean and the mass loss due to land ice melt (e.g. IPCC, 2013; Dieng et al., 2017) Long - term and inter-annual variations of the sea level are observed at global and regional scales.

They believe that winds have not caused the long - term warming or loss of ice, so it must be warmer ocean temperatures pushing into the region west of Svalbard.

Provided that rapid losses in sea ice may be predictable, there is additional uncertainty regarding what is required in terms of an observational network and modeling system to predict such events.

A series of extremely low September sea ice conditions during the last decade, including the unprecedented declines in 2007 and 2012, suggests a recent acceleration in the long - term Arctic sea ice loss (e.g., Stroeve et al., 2012b).

The researchers failed to find any long - term trends in Arctic storminess, suggesting that summer weather hasn't been a major driver of the overall decades - long ice loss in the Arctic.

Lead author Adrian Jenkins said, The discovery of the ridge has raised new questions about whether the current loss of ice from Pine Island Glacier is caused by recent climate change or is a continution of a longer - term process that began when the glacier disconnect from the ridge.

ScienceDaily (July 24, 2012)-- Researchers have found a way to use GPS to measure short - term changes in the rate of ice loss on Greenland — and reveal a surprising link between the ice and the atmosphere above it

However, detecting acceleration is difficult because of (i) interannual variability in GMSL largely driven by changes in terrestrial water storage (TWS)(7 ⇓ — 9), (ii) decadal variability in TWS (10), thermosteric sea level, and ice sheet mass loss (11) that might masquerade as a long - term acceleration over a 25 - y record, (iii) episodic variability driven by large volcanic eruptions (12), and (iv) errors in the altimeter data, in particular, potential drifts in the instruments over time (13).