Sentences with phrase «last warm interval»

Below you'll hear from scientists with significant concerns about keystone sections of the paper — on the evidence for «superstorms» in the last warm interval between ice ages, the Eemian, and on the pace at which seas could rise and the imminence of any substantial uptick in the rate of coastal inundation.

«In the last warm interval on Earth (called the Eemian), global temperatures were likely only +0.2 or +0.3 degrees Celsius warmer than today (+1 degrees maximum), and sea level was +5 to +9 meters higher.

Not exact matches

Here's another way to frame the question: Have we left the Holocene Epoch — the warm interval since the end of the last ice age some 10,000 years ago — and entered what is increasingly described as a geological epoch or age of our own making?

In the short video above, Dr. Alley explains how some patterns in the changes that occur during Earth's ice ages and warm intervals (like the last 11,000 years) prove that greenhouse gases exert a warming effect.

And there are plenty of important questions to resolve about the climate of the Holocene — this comfy warm interval humans have enjoyed since the end of the last ice age — before the human influence on the system built in recent decades.

The spatial mean and dispersion of surface temperatures over the last 1200 years: warm intervals are also variable intervals by Martin P. Tingley and Peter Huybers, both of Department of Earth and Planetary Sciences, Harvard.

''... worked with two sediment cores they extracted from the seabed of the eastern Norwegian Sea, developing a 1000 - year proxy temperature record «based on measurements of δ18O in Neogloboquadrina pachyderma, a planktonic foraminifer that calcifies at relatively shallow depths within the Atlantic waters of the eastern Norwegian Sea during late summer,» which they compared with the temporal histories of various proxies of concomitant solar activity... This work revealed, as the seven scientists describe it, that «the lowest isotope values (highest temperatures) of the last millennium are seen ~ 1100 - 1300 A.D., during the Medieval Climate Anomaly, and again after ~ 1950 A.D.» In between these two warm intervals, of course, were the colder temperatures of the Little Ice Age, when oscillatory thermal minima occurred at the times of the Dalton, Maunder, Sporer and Wolf solar minima, such that the δ18O proxy record of near - surface water temperature was found to be «robustly and near - synchronously correlated with various proxies of solar variability spanning the last millennium,» with decade - to century - scale temperature variability of 1 to 2 °C magnitude.»

If, on the other hand, the differences between station means and station offsets show large variance because different stations have warmed differently between baseline and observation intervals, then the last term will greatly increase the estimated data variance.

Note that for each data set, the full - sample (about 30 years) trend is within the confidence interval of the 10 - year trend — so there's no evidence, from any of the data sets, that the trend over the last decade is different from the modern global warming trend.

[* = «three particularly cold intervals: one beginning about 1650, another about 1770, and the last in 1850, all separated by intervals of slight warming.»]

As Emiliani put it in 1974, «We used to think intervals as warm as the present lasted 100,000 years or so.

These salinity shifts correspond well in timing to the OHC shifts, which are also coincident with surface transitions from global - warming slowdown to rapid warming and then to the current slowdown, with intervals between shifts lasting about three decades.

However, the Prudent Path authors fail to reference a recent paper (Kaufmann et al. 2009) which analyzed Arctic temperature changes over a 2000 year period (0 to 1999 AD) and concluded that «the most recent 10 - year interval (1999 - 2008) was the warmest of the past 200 decades» and that «4/5 of the warmest decades occurred during the last century».

In the context of climate reconstruction, where the calibration interval (the last 150 years) is generally warmer than times in the past, regression dilution thus results in reconstructions of past temperatures that are biased towards warm values.

Well drained and rocky substrate there creates a glade ecosystem where sloping ground can encourage the growth of prickly pear cacti and other desert and prairie species such as the collared lizard, Crotaphytus that last covered the whole area around 7,000 years ago in the Hypsithermal Interval, during the Holocene Period, when warming dried out much of the glacial Northern Hemisphere.