Colors like yellow and lavender indicating higher concentrations come and go, but weak
ice concentration areas indicated by green tend to stick around.
Not exact matches
The start - up's premiere product, the Thin
Ice vest, uses cold therapy to target
areas of the body with high
concentrations of thermoreceptors, which are nerve cells that are able to detect the presence of hot or cold temperatures.
A new University of Colorado Boulder study comparing dissolved black carbon deposition on
ice and snow in ecosystems around the world (including Antarctica, the Arctic, and alpine regions of the Himalayas, Rockies, Andes, and Alps) shows that while
concentrations vary widely, significant amounts can persist in both pristine and non-pristine
areas of snow.
The Mars Express observations hint at greater methane
concentrations over
areas containing subsurface water
ice.
This week, Arctic sea
ice extent - that is, the total ocean
area in which the
ice concentration is at least 15 percent - was at 1.96 million square miles.
The most common indicator is the atmospheric background CO2
concentration, the global mean temperature, the global mean sea level, and the
area with snow or Arctic sea
ice.
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,
``... sea
ice concentration (SIC) data * of AMSR - E standard products are used for
area calculation.
Sea
ice extent is defined by the
area in which
ice concentration exceeds 15 percent.
Light blues and greens in ocean
areas indicate
areas of low
ice concentration.
Sea
ice extent is defined as the surface
area enclosed by the sea
ice edge (where sea
ice concentration falls below 15 %).
One of the difficulties using charts based on in situ observations is that there was very little exploration poleward of the «marginal
ice zone» (the
area of partial sea
ice cover near the
ice edge), so in older reconstructions the
ice concentration was often assumed to be 100 % beyond the marginal zone.
Ice - covered
areas range in color from white (highest
concentration) to light blue (lowest
concentration).
A note of caution: To avoid erroneous
ice concentration along coasts (satellite signal mixed from land and ocean), near coastal -
areas have to be excluded.
Annual Antarctic sea
ice extent (total
area of at least 15 %
ice concentration) for selected years since 1979.
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...»
As the BRT stated, «Research suggests that, during the time of whelping and nursing, bearded seals prefer
areas where the percent
concentration of sea
ice is > 25 %.
A 40 %
concentration cutoff; open water
areas could have sea
ice at
concentrations less than 40 %.
Note a 40 %
concentration cutoff is used in the
ice age maps, which means that
ice still could be present in
areas shown as «open water (OW)».
This is consistent with both the June and July (Figure 3) ensemble predictions from a coupled
ice - ocean model submitted by Zhang, which show considerably more
ice in the East Siberian Sea compared to 2009, and it is consistent with the June statistical forecasts submitted by Tivy, which also predict a greater
ice area than in 2009 and above - normal
ice concentrations along the coasts.
Note open water developing off Siberian and North American coastlines, and
areas of low
ice concentration in the central Arctic for the same day as seen in visible - range MODIS imagery (right panel, NASA MODIS Rapid Response System).
Lighter than 2009: Petrich (break - up of fast
ice around Barrow), Tivy (
ice area), Zhang (regional pattern of
ice concentration)
2012's sea
ice area and extent were already trending low this year, but damage done to the thin and low
concentration of
ice by this storm almost ensures that 2012 will eclipse 2007 in all categories as the lowest sea
ice on record by the time the September low is set.
Maslanik, Rigor et al., Pokrovsky (June report), Tivy (June report)-- below normal
ice area overall, but high
concentration may remain along the coast
Maslanik, Tivy, Pokrovsky — below - normal
ice area overall, but high
concentration may remain along the coast in the southern Beaufort and Chukchi Seas
Extent here is defined as the total
area of
ice with
concentration (over an
area of at least 100 square kilometers) greater than 15 %.
The fourth core, Core PS2138 - 2, is located at the Barents Sea continental margin, an
area with a seasonal sea
ice cover and a strong influence of warm Atlantic Water inflow today (Fig. 1; ca. 4/10 summer sea
ice concentration).
The most important color on the Bremen map is the green
areas, because this indicates when the
ice concentration level drops below 70 %.
Core PS2757 - 8 is located on the southern Lomonosov Ridge close to the Laptev Sea continental margin, an
area that is predominantly covered by sea
ice (Fig. 1; 7/10 summer sea
ice concentration) but may occasionally be even
ice - free during summer.
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.
The «Temperature Departure From Average» map below further reveals the
areas of
concentration for climate engineering orchestrated chemical cool - downs and sea surface chemical
ice nucleation (also fueling extreme hail events).
In examining
ice area — the extent weighted by
concentration — the seasonal minimum in 2008 was nearly identical to that of 2007.
At the end of the melt season, there was a considerable
area of low -
concentration (and likely relatively thin) sea
ice near the
ice edge, particularly in the northern Beaufort / Chukchi Seas.
The region of
ice concentration > 60 % on August 5 from MyOcean (TOPAZ4 model) was used as a predictor variable, and a linear regression was performed of September NSIDC extent vs. > 60 %
concentration area on August 5.
Greenland, Siberia, and Antarctica, should be noted as climate engineering
concentration areas due to the grave ramifications posed by the melting
ice and / or frozen methane deposits in these regions.
Very early in the season this whole
area already exhibited a significantly lower sea
ice concentration that accentuated throughout the summer season.
When NSIDC are calculating the
concentrations for a particular grid cell, they calculate both the
area covered by
ice and the length of time the
ice was there.
Earlier studies have predominately focused on the loss of sea
ice concentration (fraction of
ice within an
area) and therefore the total sea
ice extent (Fig. 1).
6
Ice age — time in the past when continental glaciers covered large parts of Earth's surface Global warming — a gradual increase in the temperature of Earth's atmosphere Greenhouse gas — Gases in the atmosphere, such as carbon dioxide, that trap solar energy Ozone hole — a large
area of reduced ozone
concentration in the stratosphere, found over Antarctica Chlorofluorocarbon — chlorine compounds that are the main cause of ozone depletion KEY TERMS
At the beginning of July,
ice concentrations in the region remain high, 9-10/10, with some small
areas of open water along the southern route.
Extent is defined as the total
area in which the
ice concentration is at least 15 percent.
The
area around the North Pole is
ice - covered — an assumption confirmed by many airborne and
ice - surface expeditions — but researchers use an average of the
concentration just outside the gap to estimate the extent within.
I use three variables (land snow cover,
ice concentration,
ice area) that are available in June, in a formula which shows particularly strong correlation with Sept sea
ice extent.
To be consistent with the validating sea
ice extent index from NSIDC, if possible, please first compute the average sea
ice concentration for the month and then compute the extent as the sum of cell
areas > 15 %.
Once the
ice barrier at the top of the strait gives way,
ice from the Arctic Ocean can spill over into this region, affecting navigation, but also providing a mechanism to reduce
ice concentrations in an
area of very thick
ice in the high Arctic.
Top panels: 50 % annual sea
ice concentration (dashed blue line) and buoyancy fluxes, where negative values (blue shading) are associated with sea
ice formation; note that these
areas expand equatorward in the LGM simulation.
If you look at the above link you'll notice a round wide open expanse of water along the Gakkel Ridge, in an
area of
ice concentration that is otherwise at much higher
concentrations.
The heuristic forecast submitted by Howell in June is unchanged; below average
concentrations of multi-year
ice in the
area will facilitate clearing.
This chart, from Gagné et al, shows the
area - averaged annual mean sea
ice concentration anomaly between 1950 and 2005.
Scientists at NSIDC report extent because they are cautious about summertime values of
ice concentration and
area taken from satellite sensors.