Sentences with phrase «ice minimum levels»

Sea ice minimum levels are falling at the rate of 14 % a decade in the Arctic, and polar bears have been feeling the loss.

Not exact matches

Still, California dairymen have long - argued that the state milk system favors milk processors, which leads to lower producer milk prices, though all regulated orders establish minimum pricing levels for milk based on the end product — butter, cheese, fluid, ice cream, etc..

Current ice extent is well below levels at the same point in 2012, which went on to set the current record for the lowest sea ice minimum extent:

Google has released Google Play Services 10.2, and true to their word in November, minimum API level has been raised to Ice Cream Sandwich's 14, dropping Gingerbread and Honeycomb after over half a decade of support.

In contrast, the much more expansive ice volume maxima (equivalently, sea level minima) during a glacial maximum is more defined.

(1) One is the ice sheet and glacier mechanical collapse, which doesn't require a whole lot more warming, but will happen with some set minimum amount of warming over some time period; and (2) the other is global warming that keeps increasing beyond the level needed to cause # 1, which among other things will perhaps lead to positive carbon feedbacks (e.g., from melting permafrost and hydrates).

It also reproduces the Eemian - last glacial transition where CO2 levels remained high, while temperatures were near minimum (and ice sheet formation was near maximum).

That the minimum values are near the ice core measurements at high wind speed only is an indication that the background levels indeed were around the ice core values.

Thus if one plots all the minima of the different historical measurements, that gives a better impression of the real «background» CO2 level than the averages: see The same for ocean data and coastal data: all are around the ice core level.

If one looks at the minima of the historical CO2 ranges in each year, these encompass the ice core levels, and the minima are (as in modern times) found at higher wind speeds.

NASA satellite data reveals how this year's minimum sea ice extent, reached on Sept. 9 as depicted here, declined to a level far smaller than the 30 - year average (in yellow) and opened up Northwest Passage shipping lanes (in red).

And remember, the satellite data are one small part of a vast amount of data that overwhelmingly show our planet is warming up: retreating glaciers, huge amounts of ice melting at both poles, the «death spiral» of arctic ice every year at the summer minimum over time, earlier annual starts of warm weather and later starts of cold weather, warming oceans, rising sea levels, ocean acidification, more extreme weather, changing weather patterns overall, earlier snow melts, and lower snow cover in the spring...

«A peer - reviewed paper [Krivova et al.] published in the Journal of Geophysical Research finds that reconstructions of total solar irradiance (TSI) show a significant increase since the Maunder minimum in the 1600's during the Little Ice Age and shows further increases over the 19th and 20th centuries... Use of the Stefan - Boltzmann equation indicates that a 1.25 W / m2 increase in solar activity could account for an approximate.44 C global temperature increase... A significant new finding is that portions of the more energetic ultraviolet region of the solar spectrum increased by almost 50 % over the 400 years since the Maunder minimum... This is highly significant because the UV portion of the solar spectrum is the most important for heating of the oceans due to the greatest penetration beyond the surface and highest energy levels.

Total sea ice extent for the previous three months was near or below the level of 2007, the year with the lowest minimum summer ice extent during the satellite record.

(See: NYT: Missing Its Spots: «Sun may be on verge of falling into an extended slumber» — could cause «extended chilly period» — «Cosmic ray levels correlate well with climate extending back thousands of years» — July 21, 2009 & Also see: «Sun Sleeps»: Danish Scientist declares «global warming has stopped and a cooling is beginning... enjoy global warming while it lasts» — Sun is «heading towards «a grand minimum» as we saw in Little Ice Age» — Sept. 11, 2009)

In September 2007 sea ice extent reached its lowest level since the satellite record began in 1979; the monthly extent, 4.28 × 106 square kilometers, surpassed the previous sea ice minimum record (set in 2005) by 1.28 × 106 square kilometers [Stroeve et al., 2008].

published in the Journal of Geophysical Research finds that reconstructions of total solar irradiance (TSI) show a significant increase since the Maunder minimum in the 1600's during the Little Ice Age and shows further increases over the 19th and 20th centuries... Use of the Stefan - Boltzmann equation indicates that a 1.25 W / m2 increase in solar activity could account for an approximate.44 C global temperature increase... A significant new finding is that portions of the more energetic ultraviolet region of the solar spectrum increased by almost 50 % over the 400 years since the Maunder minimum... This is highly significant because the UV portion of the solar spectrum is the most important for heating of the oceans due to the greatest penetration beyond the surface and highest energy levels.

We should also not forget that back in 2005, minimum sea ice levels like we've seen since 2007 (3 - 5 mkm2) were not predicted to occur until 2040 - 2070.

«Since irradiance variations are apparently minimal, changes in the Earth's climate that seem to be associated with changes in the level of solar activity — the Maunder Minimum and the Little Ice age for example — would then seem to be due to terrestrial responses to more subtle changes in the Sun's spectrum of radiative output.

Depending on how the weather plays out over the next few weeks, that minimum is likely to fall somewhere between second and fifth place, they estimate — still a remarkably low level that shows how precipitously sea ice has declined in recent decades.

Actually Fielding's use of that graph is quite informative of how denialist arguments are framed — the selected bit of a selected graph (and don't mention the fastest warming region on the planet being left out of that data set), or the complete passing over of short term variability vs longer term trends, or the other measures and indicators of climate change from ocean heat content and sea levels to changes in ice sheets and minimum sea ice levels, or the passing over of issues like lag time between emissions and effects on temperatures... etc..

It is uncertain whether the solar irradiance will rebound soon into a more - or-less normal solar cycle — or whether it might remain at a low level for decades, analogous to the Maunder Minimum, a period of few sunspots that may have been a principal cause of the Little Ice Age.

At the other side, the end of the Eemian is interesting that it shows a cooling to a new minimum (and ice sheets to a new maximum — both at about 75 % of the previous opposite directions) while CO2 levels remained high.

During this Pleistocene Ice Age, CO2 tends to reach a minimum level when the successive glaciations reach their peak.

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.

CO2 minima were reached approximately when the sea level was at a minimum, hence, the extent of the continental ice sheets were at a maximum, and the highest CO2 levels were found during interglacials during the high stands of the sea level.

What we know of the connection between solar activity and radiation, coupled with high abundances of isotopes in tree - rings and ice - cores (Fig. 2d), supports the likely case that during the Maunder Minimum solar activity remained for over half a century at very low levels.

Last week saw the annual summer minimum of the Arctic ice cap, which has now shrunk to the lowest level satellites have ever recorded.

Carrington continues: «Last week saw the annual summer minimum of the Arctic ice cap, which has now shrunk to the lowest level satellites have ever recorded.»

Temperature and CH4 levels were already at a minimum and ice sheet building already at a new maximum before CO2 levels started to drop.

When these melt at a minimum the portion of the ice above sea level contributes to sea level rise.

The paper questioned whether climate change was dangerous for polar bears and whether the region was warming at all, even as NASA reported that the 2007 minimum sea ice levels were at an all - time low, falling to nearly 40 percent below the 1979 - 2000 average.

Each year the ice expands through the winter before melting away as the sun warms the northern hemisphere, reaching its minimum level in September.

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