Sentences with phrase «global ice conditions»

< My response is that rapid climate change is happening, evidenced by observed changes in global ice conditions and global tempertures from the late 1970s to present.

Not exact matches

«The idea is that sudden changes could arise when threshold conditions are met — for example, a tipping point arises whereby a large amount of ice is released suddenly into global oceans.

- Paige Brown — Colder than Ice: Researchers Discover How Microbes Survive in Sub-Freezing Conditions - Tim Lahey — HIV and the Global Sex Tally - Layla Eplett — The Heir And The Spare: Preserving Heritage And Heirloom Apples - Pamela Ronald — Lab Life: The Anatomy of a Retraction -LSB-...]

Europa has a global ocean locked away beneath a crust of ice; deep below, the moon's internal heat might create hospitable conditions, akin to hydrothermal vents at the bottom of the mid-Atlantic ridge and East Pacific Rise on Earth.

It appears global warming is replicating conditions that, in the past, triggered significant shifts in the stability of the Antarctic ice sheet.

Conclusion: Global warming was primarily responsible, due equally to the thinning sea ice and warm atmospheric conditions.

A study examined three different factors: warmer - than - usual surface atmosphere conditions (related to global warming); sea - ice thinning prior to the melting season (also related to global warming); and an August storm that passed over the Arctic, stirring up the ocean, fracturing the sea ice and sending it southward to warmer climes.

Our study underlines that these conditions have led to a large loss of ice and significant rises in global sea level in the past.

The results highlight how the interaction between ocean conditions and the bedrock beneath a glacier can influence the frozen mass, helping scientists better predict future Antarctica ice loss and global sea level rise.

Lack of knowledge about the ice sheets and their behavior is the primary reason that projections of global sea level rise includes such a wide range of plausible future conditions.

This changed ocean chemistry and reduced atmospheric CO2 levels, which increased global ice coverage and propelled Earth into severe icehouse conditions.

Current changes in the ocean around Antarctica are disturbingly close to conditions 14,000 years ago that new research shows may have led to the rapid melting of Antarctic ice and an abrupt 3 - 4 metre rise in global sea level.

January and February obliterated global temperature records, setting up conditions for the further retreat of the Arctic summer ice cover, scientists have warned.

Mengel said some simulations produced the warm ocean conditions needed to remove the ice cork within the next 200 years, but It would take around 2,000 years to raise global sea levels by one meter (3.3 feet).

The implications of considering Arctic sea - ice - free conditions for the transformation of the global energy system are severe.

I think these are simply features of global climate that are embedded and as predictable as other large features like hurricane patterns, the gulf stream, the jet stream, sea ice extent and mass, global glacial conditions, sea level etc..

Now to contribute a single event to Global Warming, one has to look at the weather conditions, and if patterns are sighted which are tied to alteration of sea ice decline (our new atmosphere set up), we can connect the dots here too.

However, atmospheric CO2 content plays an important internal feedback role.Orbital - scale variability in CO2 concentrations over the last several hundred thousand years covaries (Figure 5.3) with variability in proxy records including reconstructions of global ice volume (Lisiecki and Raymo, 2005), climatic conditions in central Asia (Prokopenko et al., 2006), tropical (Herbert et al., 2010) and Southern Ocean SST (Pahnke et al., 2003; Lang and Wolff, 2011), Antarctic temperature (Parrenin et al., 2013), deep - ocean temperature (Elder eld et al., 2010), biogeochemical conditions in the Northet al., 2008).

The study starts with observations of eroding ice sheets spreading, cooler freshwater at both ends of the planet and geological hints of tempestuous conditions toward the end of the Eemian, that last interval between ice ages when global temperatures and seas were higher than now.

I read recently (in E. C. Pielou, «After the Ice Age») that toward the end of the last ice age — but long before the glaciers had receded from the continental U.S. — average global temperatures climbed to 2 - 3 degrees Centigrade above those of the modern era, a condition that obviously reversed at some poiIce Age») that toward the end of the last ice age — but long before the glaciers had receded from the continental U.S. — average global temperatures climbed to 2 - 3 degrees Centigrade above those of the modern era, a condition that obviously reversed at some poiice age — but long before the glaciers had receded from the continental U.S. — average global temperatures climbed to 2 - 3 degrees Centigrade above those of the modern era, a condition that obviously reversed at some point.

The fact that our model does a surprisingly good job with simulating the last 400,000 years of global ice volume, with no change in model physics and only one linear change in boundary conditions, argues for the fact that, despite plausible deficiencies, we have done a surprisingly good job of simulating the pattern of fluctuations in ice volume.

Some scientists have even warned that weakening solar activity could spark another «Little Ice Age,» arguing conditions mirror the centuries of global cooling the Earth went through from the late Middle Ages to the mid-19th Century.

Arbetter, 4.7, Statistical A statistical model using regional observations of sea ice area and global NCEP air temperature, sea level pressure, and freezing degree day estimates continues the trend of projecting below - average summer sea ice conditions for the Arctic.

So not only was Greenland already mostly covered in ice when Europeans settled there, but also the relatively warm conditions during this period were not a global phenomenon.

For the past 55 million years the global surface temperature has declined by more than 10 °C from a «hot house» condition into an «ice house» with increasing temperature variability as depicted in Figure 1 (Mya = millions of years ago).

Russia's president also pointed to the economic importance of the Arctic region as he argued global warming and ice melting in the area created beneficial conditions for economic improvement.

Tagged Aars, advocacy, Andersen, arctic sea ice, Barents Sea, body condition, climate change, emaciated, fat, global warming, good news, injured, Langenberger, old, photographer, pigs, polar bear, sick, Svalbard, viral, York

Polar bears have experienced those supposedly deadly low - ice summers for almost a decade but the global population did not drop by 2/3 as predicted and not a single one of the ten subpopulations predicted to be extirpated under those conditions has been wiped out.

estimated the annual mean global surface warming threshold for nearly ice - free Arctic conditions in September to be ~ 2 °C above...

Arctic sea ice recovers Soon after global warming alarmists hollered that the Arctic was in collapse, the conditions there have -LSB-...]

Including open - water phytoplankton biomarkers as well as micropaleontological data, we demonstrate (1) that a permanent sea ice cover existed during MIS 6 and (2) that during the LIG sea ice was still present in the central Arctic Ocean during the spring / summer season even under (global) boundary conditions significantly warmer than the present.

For more on the terrestrial foods topic, see my detailed discussion in this previous post, and this recent (March 30) ScienceNews report on yet another, largely anecdotal «polar bears resort to bird eggs because of declining sea ice» story (see photo below, based on a new paper by Prop and colleagues), which was also covered March 31 at the DailyMail («Polar bears are forced to raid seabird nests as Arctic sea ice melts — eating more than 200 eggs in two hours,» with lots of hand - wringing and sea ice hype but little mention of the fact that there are many more bears now than there were in the early 1970s around Svalbard or that the variable, cyclical, AMO (not global warming) has had the largest impact on sea ice conditions in the Barents Sea).

report that ocean sediment cores containing an «undisturbed history of the past» have been analyzed for variations in PP over timescales that include the Little Ice Age... they determined that during the LIA the ocean off Peru had «low PP, diatoms and fish,» but that «at the end of the LIA, this condition changed abruptly to the low subsurface oxygen, eutrophic upwelling ecosystem that today produces more fish than any region of the world's oceans... write that «in coastal environments, PP, diatoms and fish and their associated predators are predicted to decrease and the microbial food web to increase under global warming scenarios,» citing Ito et al..

The study also found that the Southern Ocean Circumpolar Current, which helps determine sea - ice extent, is steered by submerged ridges and canyons along the edge of the Antarctic continental shelf, rather than by global warming or other climatic conditions.

But there also have been periods which have been as cold or colder than our Ice box climate which we have been in for tens of millions of year - and for periods as long or longer than our global climate conditions.

... Global temperature becomes an unreliable diagnostic of planetary condition as the ice melt rate increases.

Now we have poor hunting conditions in the Bering Strait touted as evidence that «walrus migration patterns have changed» with the implication that this is because ``... the past eight years have had the eight lowest amounts of summer sea ice on record» due to man - made global warming.

As the earth continues to recover from the abnormally cold conditions of the centuries - long Little Ice Age, warmer temperatures, improving soil moisture, and more abundant atmospheric carbon dioxide have helped bring about a golden age for global agricultural production.

The energy system is both a source of emissions that lead to global warming and it can also be directly affected by climate change: through changes in our energy consumption patterns, potential shutdowns of offshore oil and gas production, changing ice and snow conditions in the oil production regions of Alaska, changing sea ice conditions in the Arctic Ocean and the implications for shipping routes, and impacts of sea - level rise on coasts, where so much of our energy facility infrastructure is located.

NRL - atm - ocn - ice, 4.8 (4.4 - 5.3), Modeling (fully coupled)(Same as June) The projected Arctic minimum sea ice extent from the Navy's global coupled atmosphere - ocean - ice modeling system based on May 2016 initial ice conditions is 4.8 km2.

but this occurred under significantly different orbital forcing conditions» This is to make us believe that a global mean temperature could drive the melting or calving of the Greenland; but the Eemian diminution of the Greenland ice cap is by no means related to an average global temperature but to the local summer insolation that during the last interglacial was up to 30 W / m ² to 60 W / m ² stronger than today's.

Still, I base these on the notion that Arctic Ice will be a proxy for global temperature, when I know that local conditions often predominate.

The first set of simulations, referred to as Global Atmosphere - Global Ocean (GOGA) experiments, are forced with prescribed SST and sea ice concentrations from the observational datasets of Hurrell et al. (2008) for 1979 — 2008, with different initial conditions for each ensemble member.

It is still functioning well as the composite global map produced by NOAA of snow and ice conditions for February 4, 2011 illustrates.

Albedo should increase in response to very low solar conditions which should result in an increase in major volcanic activity, increase in global cloud coverage and sea ice / snow coverage.

Mengel said some simulations produced the warm ocean conditions needed to remove the ice cork within the next 200 years, but It would take around 2,000 years to raise global sea levels by one metre.

This is predicted to produce changes such as the melting of glaciers and ice sheets, more extreme temperature ranges, significant changes in weather conditions and a global rise in average sea levels.

It is true that we can presently do little about volcanos and other natural disasters, but if our behaviour is likely to hasten global warming, or ice - age conditions — whatever it might be, then we should tread carefully.

These simulations show a global cooling of approximately 3.5 °C to 5.2 °C when LGM greenhouse gas and ice sheet boundary conditions are specified (Chapter 6), which is within the range -LRB--- 1.8 °C to — 6.5 °C) of PMIP results from simpler models that were discussed in the TAR (McAvaney et al., 2001).

In their paper «Exploring recent trends in Northern Hemisphere blocking,» Barnes and colleagues used various meteorological definitions of «blocking» along with various datasets of atmospheric conditions to assess whether or not there have been any trends in the frequency of blocking events that could be tied to changes in global warming and / or the declines in Arctic sea ice.