Sentences with phrase «sea ice trends»

Here's the global sea ice trend, combining what's going on up north and down south.

From 2006 to 2016, global sea ice trends have also been remarkably stable despite a massive increase in anthropogenic CO2 emissions during this period.

[Aug. 9, 8:04 p.m. Updated Joe Romm has predictably assailed my view of Arctic sea ice trends and their implications, straying into discussions of melting permafrost (which is an entirely different issue laden with its own questions — one being why the last big retreat of permafrost, in the Holocene's warmest stretch, didn't have a greenhouse - gas impact) and my refusal to proclaim a magically safe level of carbon dioxide (which I discuss here).

(I ran a preliminary version of the chart in a recent post on sea ice trends, but now it's been updated with the full month's readings of atmospheric pressures.)

Also, a recent analysis of Antarctic sea ice trends for 1978 — 1996 by Watkins and Simmonds [2000] found significant increases in both Antarctic sea ice extent and ice area, similar to the results in this paper.

Here's the graph of modeled and observed sea ice trends that Rigor alludes to; it is an updated version of the graph appearing in this 2007 paper by Stroeve, Holland et al.:

Shown below is the declining sea ice trend for the month of January since satellite measurements began, in 1979.

Generally speaking, warming of Arctic stations is high (as predicted by models, and apparently confirmed by sea ice trends and phenology), so Arctic grid cells tend to have high warming.

According to NSIDC sea ice trend data, from 1979 to 2006, the sea ice losses for the Arctic (purple trend line in graph below) were effectively counterbalanced by the sea ice gains in the Antarctic (green trend line), producing a conspicuously flat trend line in global sea ice.

According to NSIDC sea ice trend data, -LSB-...]

The paper concluded that «current climate models are still quite poor at modelling past sea ice trends» after including a graph showing a decline in sea ice starting at the beginning of the «satellite era» in 1979.

Southern Ocean SST and sea ice trends from HadSST, for the periods 1950 - 1978 (left) and 1979 - 2014 (right) and the zonal mean of both (middle) from Fan et al. (2014).

These winds also push the ocean surface northwards too, which effectively brings warmer water to the surface and eventually counters the increasing sea ice trend after a few decades.

Computing and representing sea ice trends: Toward a community consensus.

I think NSDIC did a good job this year in keeping people informed about the shrinking sea ice trend.

The National Snow and Ice Data Center chart on the right shows a rising sea ice trend over the available data from 1980.

Similar sea ice trends and weather conditions were present during the spring seasons preceding past ice shelf retreats (e.g., 2001 to 2002).

While Swart and colleagues correctly assess that «using short - term trends can be misleading about longer - term changes», they apparently only consider the 1979 - 2013 Arctic September sea ice trend as «longer - term».

Global climate model projections for sea ice trends around Antarctica are at odds with what is being observed.

NSIDC has high confidence in sea ice trend statistics and the comparison of sea ice extent between years.

In order to make improved projections, scientists are fine - tuning their understanding of the many influences on sea ice trends, including both manmade global warming and natural climate variability.

Joe Romm has predictably assailed my rejection of his «death spiral» depiction of Arctic sea ice trends, straying into discussions of melting permafrost (which is an entirely different issue laden with its own questions — one being why the last big retreat of permafrost, in the Holocene's warmest stretch, didn't have a greenhouse - gas impact) and my refusal to proclaim a magically safe level of carbon dioxide (which I discuss here).

Clearly, therefore, something must be fundamentally wrong with the climate models, for their predictions to be so far off from the observed sea ice trends.»

Currently the declining sea ice trend is steeper for the Arctic summer than for the Arctic winter.

Newer computer models that scientists are using to help prepare the next IPCC report, which is scheduled to be released in 2014, do a much better job capturing the historical sea ice trends than the previous generation of models did, several sea ice experts told Climate Central.

«Global Sea ice trend by year only (barely) crosses 95 % significance when the first two months of satellite data is included for the entire record.»