Sentences with phrase «ice volume trends»

As a result of this evaluation our conservative estimates of the uncertainty of the linear ice volume trend from 1979 - present is about 30 %.

Not exact matches

But the story in East Antarctica is still murky, they report; although the volume of its ice shelves has fluctuated significantly, they found no clear trend of volume loss during that time period.

The authors of a new study reviewing the volume data, detailed on Monday in the journal Nature Geoscience, are quick to caution, though, that one single year of rebound doesn't suggest any sea ice recovery, as the overall trend is still downward.

It is difficult to see how a person in the general public should not be concerned by the downward trend of Arctic sea ice volume.

Extrapolating based on date from 1980 to the present yields and estimate around the 2040 for zero September ice volume while using an apparent steeper trend since 2000 yields an estimate around 2015 for the lower curve in fig. 1 or around 2020 using the upper curve as a guide.

It's worth bearing in mind that despite the increase in area export, volume export through Fram shows no trend, e.g. Spreen et al: http://soa.arcus.org/abstracts/fram-strait-sea-ice-volume-export-estimated-between-2003-and-2008-satellite-data This is because the ice being exported has thinned even as area export has increased.

I see no alternative but that the model used for calculating ice volume has a built - in trend mechanism, which may be non-linear.

Clearly, the sea ice volume data plot is the single most important topic of discussion, yet in the article it is shown in Figure 1 with a poor vertical scale and amongst linear trend lines which mislead and make the curve appear to be linear and reach the zero point far out in the future.

There are certainly better indicators of global warming trends — ice sheet volume, sea ice extent and sea surface temperatures all come to mind — but hurricanes get people's attention.

The next implication is that those who try to predict ice volume using past ice volume data are largely picking up the artifical trend that is built into the data.

I would have said it is transparently obvious that ice volume is a better measure than ice area, if you want to understand long - term trend and the impact of human emissions — though it's great to have both measures.

Right now, the trend for sea ice volume is down.

As soon as the ice in Nares Strait breaks up, a continuation of current trends will be advantageous for the export of substantial volumes of the remaining older ice through that channel, supplementing the export through Fram Strait.

An anomalous drop has been noted in the PIOMAS ice volume model that is outside the previous trend range.

For example, let's say that evidence convinced me (in a way that I wasn't convinced previously) that all recent changes in land surface temperatures and sea surface temperatures and atmospheric temperatures and deep sea temperatures and sea ice extent and sea ice volume and sea ice density and moisture content in the air and cloud coverage and rainfall and measures of extreme weather were all directly tied to internal natural variability, and that I can now see that as the result of a statistical modeling of the trends as associated with natural phenomena.

The results of their mission confirm the predicted trend of the decreasing sea ice volume in the Arctic basin.

The long - term trend is what matters, and the most important of all metric in sea ice is volume.

After the maximum was reached, the trend line flattened, with sea ice volume going down by a meagre 91 km3 from the 16th to the end of the month, which can clearly be seen on Wipneus» version of the PIOMAS graph:

«In fact, the September sea ice volume is already down 75 % with a trend to zero by September 2016, suggests that the Arctic is heading for complete meltdown, which would be a planetary catastrophe,» Ibid.

The modeled evolution of Arctic sea ice volume appears to be much stronger correlated with changes in ice thickness than with ice extent as it shows a similar negative trend beginning around the mid-1990s.

Given the estimated trend and the volume estimate for October — November of 2007 at less than 9,000 km3, one can project that at this rate it would take only 9 more years or until 2016 + / -3 years to reach a nearly ice - free Arctic Ocean in summer.

The sea ice recovery is just some natural variation on the overall trend of decreasing sea ice volume, extent and area.

To say nothing of the warming trends also noticed in, for example: * ocean heat content * wasting glaciers * Greenland and West Antarctic ice sheet mass loss * sea level rise due to all of the above * sea surface temperatures * borehole temperatures * troposphere warming (with stratosphere cooling) * Arctic sea ice reductions in volume and extent * permafrost thawing * ecosystem shifts involving plants, animals and insects

A number of techniques have been employed to sub-set or recalibrate these projections based on different aspects of the observed ice cover, including the mean and / or seasonal cycle of ice extent (e.g., Stroeve et al., 2007, 2012a; Wang and Overland, 2009, 2012), historical ice cover trends (Boe et al., 2009), and ice volume and thin ice area (Massonnet et al., 2012).

Last month, Maslowski emailed me «the sea ice behaviour during the 2009 — 2011 does not provide arguments to change this projection based on volume trend.»

Simply extrapolating historical trends also does not account for feedbacks in the system, such as the negative ice thickness - ice growth rate feedback identified by Bitz and Roe (2004) that can slow the ice volume rate of loss.

And since we have had rising sea level over last couple centuries, and this generally indicates warming global ocean volume, I expect this trend to continue for the next century [most likely] and due to warming oceans continuation of tread of less polar sea ice.

Not all ice volume measurements are showing the same trends.

Record droughts in many areas of the world, the loss of arctic sea ice — what you see is an increasing trend that is superimposed on annual variablity (no bets on what happens next year, but the five - to - ten year average in global temperatures, sea surface temperatures, ocean heat content — those will increase — and ice sheet volumes, tropical glacier volumes, sea ice extent will decrease.

MODELING OF FUTURE ARCTIC SEA ICE CHANGE «Given the estimated trend and the volume estimate for October — November of 2007 at less than 9,000 km3 (Kwok et al. 2009), one can project that at this rate it would take only 9 more years or until 2016 ± 3 years to reach a nearly ice - free Arctic Ocean in summer.»