Sentences with phrase «ice cores suggest»

Studies of Antarctic ice cores suggest that carbon dioxide dropped much more during these eras than the models by Pongratz and her team revealed.

The big temperature sensitivity DEMANDS to see much much bigger variability in CO2 than Antarctic ice cores suggest.

Gavin suggests Maunder was mild at only -.3 C but Richard Alley, historical records, glacier movement, migration patterns, clothing trends, crop records, ice cores suggest a much deeper NH dip in temps (1 - 2C).

1993 Greenland ice cores suggest that great climate changes (at least on a regional scale) can occur in the space of a single decade.

Measurements of salt particles in ice cores suggest that storminess rose toward the end of the occupation, perhaps making voyages to hunt and trade walrus ivory even more dangerous.

The new evidence has the potential to alter perceptions about which planets in the universe could sustain life and may mean that humans are having an even greater impact on levels of CO2 in Earth's atmosphere than accepted evidence from climate history studies of ice cores suggests.

WAIS Divide ice core suggests sustained changes in the atmospheric formation pathways of sulfate and nitrate since the 19th century in the extratropical Southern Hemisphere: Atmospheric Chemistry and Physics, 14, p. 5749 - 5769.

Figure 4: Greenland ice cores suggesting two large eruptions in AD 529 + / - 2 and AD 533.5 + / - 2.

«Measurements of oxygen isotopes from the GISP2 ice core suggest the ending of the Younger Dryas took place over just 40 — 50 years in three discrete steps, each lasting five years.

Mike Flynn November 19, 2015 at 9:33 pm «Measurements of oxygen isotopes from the GISP2 ice core suggest the ending of the Younger Dryas took place over just 40 — 50 years in three discrete steps, each lasting five years.

Not exact matches

New ice core research suggests that, while the changes are dramatic, they can not be attributed with confidence to human - caused global warming, said Eric Steig, a University of Washington professor of Earth and space sciences.

Ice cores from Greenland and West Antarctica suggest that average global temperatures quickly shot up during that time.

Ambrose also cites Greenland ice core data that suggest sulfur stuck around in the atmosphere longer than just a few years and that Earth had already entered a cold snap.

Recent publications analyzing the Russian ice cores have suggested the presence of heat - loving microorganisms called thermophiles, suggesting hot geothermal vents like those in the ocean may exist at the bottom of the lake.

But an ice core collected in nearby Greenland suggests that the planet experienced continuous cold from 40,000 to about 115,000 years ago, when the last warm interglacial period ended, Miller said.

Previous studies suggest that natural geologic methane emissions of the past are at least as high as natural emissions today, so studying the ancient ice cores allows researchers to accurately determine the upper limit of geologic emissions, separate from their anthropogenic counterparts.

The ice core data suggest that Svalbard's climate was about as mild in the 1300s as it is today.

As the numeral suggests, this is a 10.1 in device - the resolution is 1280 x 800 - and it comes running Android 4.0 Ice Cream Sandwich on a 1.4 GHz quad - core CPU.

The conclusions of -.3 C are not consistent with historical evidence, ice core analysis, crude 16th century thermometers, or glacier movement that suggest NH cooling of -2 C during Maunder.

Back in February, we wrote a post suggesting that Greenland ice cores may have been incorrectly dated in prior to AD 1000.

Sure, just as with the interaction between CO2 and temperature, as recorded in the ice core readings, the rise in temperature precedes the rise in CO2, wrongly suggesting that a rising temperature will produce a rise in CO2.

1966 Emiliani's analysis of deep - sea cores shows the timing of ice ages was set by small orbital shifts, suggesting that the climate system is sensitive to small changes.

Gas yield calculations suggest that other ice - bearing cores from a corehole in the Niglintgak field also contained non-visible pore space gas hydrate.

Indeed a long term ENSO proxy based on Law Dome ice core salt content suggests a 1000 year peak in El Nino frequency and intensity in the 20th century.

Current ice core chronologies conversely suggest that there was only one massive volcano in AD 536 which was responsible for the decade long climatic event (Larsen et al. 2008).

Which is not surprising, given that the ice core data suggest that this feedback only sets in with a delay of hundreds of years after the warming starts.

Just a note to point that recently published ice core evidence suggests the large globally significant 1450s eruption usually denoted as Kuwae was in the late 1450s, with ice core sulphate deposition around 1458.

The ice - core - based evidence suggests that the very beginning of a deglaciation occurs without a rise in CO2.

Ice core records suggest the idea of Holocene stability (8.2 ka even aside) but this notion is somewhat mythical.

Combined climate / ice sheet model estimates in which the Greenland surface temperature was as high during the Eemian as indicated by the NEEM ice core record suggest that loss of less than about 1 m sea level equivalent is very unlikely (e.g. Robinson et al. (2011).

The marine coring record for the Arctic suggests that the Artic has never been (summer time) ice free for at least hundreds of millions of years; you'll have to find the papers and look at the extent of coverage yourself.

Ice cores retrieved from shrinking glaciers around the world confirm their continuous existence for periods ranging from hundreds of years to multiple millennia, suggesting that climatological conditions that dominate those regions today are different from those under which these ice fields originally accumulated and have been sustainIce cores retrieved from shrinking glaciers around the world confirm their continuous existence for periods ranging from hundreds of years to multiple millennia, suggesting that climatological conditions that dominate those regions today are different from those under which these ice fields originally accumulated and have been sustainice fields originally accumulated and have been sustained.

No detailed assessment of the speed of change involved seems to have been made within the literature (though it should be possible to make such assessments from the ice core record), but the short duration of these events at least suggests changes that took only a few decades or less to occur.

As we know dust both blocks sunlight (cooling the Earth) and fertilizing the oceanic biotica (sequestrating atmospheric CO2) I suggest that Dust causes the changes in the temperature and CO2 recorded in the ice cores.

Ice core data suggest that the Greenland Summit region was ice - covered during this period, but reductions in the ice sheet extent are indicated in parts of southern GreenlaIce core data suggest that the Greenland Summit region was ice - covered during this period, but reductions in the ice sheet extent are indicated in parts of southern Greenlaice - covered during this period, but reductions in the ice sheet extent are indicated in parts of southern Greenlaice sheet extent are indicated in parts of southern Greenland.

Data on greenhouse gas abundances going back beyond a million years, that is, beyond the reach of antarctic ice cores, are still rather uncertain, but analysis of geological samples suggests that the warm ice - free periods coincide with high atmospheric CO2 levels.

There is absolutely nothing to suggest that carbon dioxide is a climate driver beyond a spurious correlation with temperature in Antarctic ice cores where blinkered climate scientists talked up the supposed CO2 - amplified warming phase but then just ignored the cooling phase that told them CO2 was obviously dominated by natural forces.

fhhaynie For the empirical ice core and proxy temperature data on which the 1000 year cycle is based see Figs 6 and 7 in the latest post at http://climatesense-norpag.blogspot.com Interestingly Fig 6 also suggests that if you believe (which I obviously don't) that CO2 is the main climate driver - its long term effect is to cool the earth.

* An exponential fit hindcasts absurdly, namely to zero when the ice core data from Vostok etc. would suggest 280 - 290 as a more reasonable hindcasting target.

This is only suggested by ice - core paleoclimate data which is ultimately uncheckable by direct empirical observation.

The correlation between Greenland ice core data and solar flux, is also seen in Scandinavian tree ring data.15 Tree rings suggest the warmest decade in the past 2000 years, happened during the warm spike of the Roman Warm Period between 27 and 56 AD.

The Vostok ice core record suggests CO2 levels have not been this high in the last 800,000 years, but if Salby is right, and temperature controls CO2, then CO2 levels ought to have been higher say, 130,000 years ago when the world was 2 — 4 degrees warmer than it is now.

Ice cores from Greenland (Alley et al., 1997) and Africa (Thompson et al., 2002) suggest that the 8.2 ka event was global in extent.»

Very few (1 - 2 points) of ice core C13 data (Francey tellus, 99) suggest that this drawdown was caused by additional terrestrial carbon storage (Joos et al, GRL, 99; Trudinger, Tellus, 99).

Ice core evidence strongly suggests that previous CO2 increases in the atmosphere have lagged temperature increases (by about 800 years).

Data from ice core records strongly suggest that the prehistoric carbon dioxide changes were largely a response, not a cause, of temperature changes.

Furthermore, the total amounts of planktic foraminifers are very similar to those determined in Holocene sediments from these two cores (Supplementary Figs. 2 and 3), suggesting similar sea ice conditions during the LIG as during the latest Holocene (present).

I suggest you look at global average temperature variations of the last 800,000 years inferred from Antarctica, Arctic and Greenland ice cores and also look at NOAA's similar time history DATA of when snow and ice accumulate at the poles in Mr. Pope's recent presentation to the Johnson Space Center Chapter of the NASA Alumni League.

But I have even seen some try to suggest that CO2 is rising now as a response the MWP, similar to the time lag of the ice core records.

Ice cores from there in 1966, and others from the Dye 3 site in southern Greenland in 1981, suggested some abrupt changes but various objections were raised to parts of the data.