Sentences with phrase «than a warmer period»

Additionally, the decade was at least one - half degree Fahrenheit warmer today than the warmest periods of that 11,000 - year time frame, even counting for uncertainties, Shuman says.

However, it leads primarily to the onset of ice ages or cool periods rather than a warmer period (due to volcanic ash that blocks out the sun).

Not exact matches

The sixth - warmest September on record for the contiguous 48 states followed a summer that was milder than the year - ago period.

However, the recent period of cooling does suggest that either manmade global warming may be smaller or that the impact of other factors may be greater than climate models have so far assumed.

The plume is far older than the recent period of atmospheric warming; indeed, at 50 million to 110 million years old, it's older than our species and the West Antarctic Ice Sheet itself.

Oregon, in fact, was 6.5 degrees (Fahrenheit) warmer than average during that period.

A Swiss - led group using tree - ring data to look at Central European summer climate patterns during roughly 2,500 years saw that periods of prolonged warming and of colder than usual spells coincided with social upheavals.

If climate change gets catastrophic — and the world sees more than 6 degrees Celsius warming of average temperatures — the planet will have left the current geologic period, known as the Quaternary and a distant successor to the Ordovician, and have returned to temperatures last seen in the Paleogene period more than 30 million years ago.

One period of particular interest is a warm, wet interglacial stage known as the Eemian that occurred from 124,000 to 119,000 years ago, featuring average global temperatures about 2 °C warmer than today.

«During last warming period, Antarctica heated up two to three times more than planet average: Amplification of warming at poles consistent with today's climate change models.»

The warmer temperatures are melting 60 times more snow from Mt. Hunter today than the amount of snow that melted during the summer before the start of the industrial period 150 years ago, according to the study.

And in many places, it's moving faster than the ice is thought to have retreated during the warming period at the end of the last ice age, around 20,000 years ago.

For example, the ice ages during the last several million years — and the warmer periods in between — appear to have been triggered by no more than a different seasonal and latitudinal distribution of the solar energy absorbed by the Earth, not by a change in output from the sun.

Short - lived climate pollutants are so called because even though they warm the planet more efficiently than carbon dioxide, they only remain in the atmosphere for a period of weeks to roughly a decade whereas carbon dioxide molecules remain in the atmosphere for a century or more.

For example, the polar bear specimen from roughly 120,000 years ago survived in Svalbard during a warm interglacial period because that Arctic archipelago remained more frozen than other areas.

The deceleration in rising temperatures during this 15 - year period is sometimes referred to as a «pause» or «hiatus» in global warming, and has raised questions about why the rate of surface warming on Earth has been markedly slower than in previous decades.

During the warm periods between recent ice ages, temperatures in Antarctica reached substantially higher levels than scientists had previously thought.

Previous estimates suggested that peak temperatures during the warmest interglacial periods — which occurred at around 125,000, 240,000 and 340,000 years ago — were about three degrees higher than they are today.

The reconstructions indicate that evidence of periods that were significantly warmer than the last decade were limited to a few areas of the North Atlantic that were probably unusual globally.

«The climate changed quite often from warmer to colder, and vice versa, but at all times it was much colder than the interglacial period that we have lived in for the past 10,000 years.»

To explore the links between climatic warming and rainfall in drylands, scientists from the Universities of Cardiff and Bristol analysed more than 50 years of detailed rainfall data (measured every minute) from a semi-arid drainage basin in south east Arizona exhibiting an upward trend in temperatures during that period.

Using climate models to understand the physical processes that were at play during the glacial periods, the team were able to show that a gradual rise in CO2 strengthened the trade winds across Central America by inducing an El Nino - like warming pattern with stronger warming in the East Pacific than the Western Atlantic.

These remains confirm that the deposits date to a warm period of climate around 420,000 years ago, the so - called Hoxnian interglacial, when the climate was probably slightly warmer than the present day.

Rather than trying to airbrush this bump in the 1940s and trying to get rid of the medieval warm period — which these hacked e-mails illustrate — we need to understand them.

By comparing the small oscillations in cosmic ray rate and temperature with the overall trends in both since 1955, Sloan and Wolfendale found that less than 14 percent of the global warming seen during this period could have been caused by solar activity.

But the temperature measurements based on the oxygen isotope O18 showed that the period between the two warm periods was colder than the cold period before the first warming 15,000 years ago.

Although the creatures would have experienced periods of winter darkness and possibly snow, temperatures in the region were warmer than they are today, averaging in the low 40s.

Peter Stott, the head of climate monitoring at the U.K. Met Office, agreed, noting in an email that, «The slowdown hasn't gone away, however, the results of this study still show the warming trend over the past 15 years has been slower than previous 15 year periods.

June — August 2014, at 0.71 °C (1.28 °F) higher than the 20th century average, was the warmest such period across global land and ocean surfaces since record keeping began in 1880, edging out the previous record set in 1998.

If this rapid warming continues, it could mean the end of the so - called slowdown — the period over the past decade or so when global surface temperatures increased less rapidly than before.

According to the AAAS What We Know report, «The projected rate of temperature change for this century is greater than that of any extended global warming period over the past 65 million years.»

And it's possible that we are currently no warmer than we were a thousand years ago, during the «Medieval Warm Period» or «Medieval Optimum,» an interval of warm conditions known from historical records and indirect evidence like tree riWarm Period» or «Medieval Optimum,» an interval of warm conditions known from historical records and indirect evidence like tree riwarm conditions known from historical records and indirect evidence like tree rings.

Why Monckton cited this work in support of his assertion that the MWP was up to 3C warmer than the current warm period is extremely difficult to fathom.

For the Quelccaya Ice Cap (13.95 oS, 70.83 oW), this work revealed that peak temperatures of the mediaeval warm period were warmer than those of the last few decades of the 20th century.»

But there were countless warm periods in the past that resulted from quite different conditions than those prevailing today (see this link on the Medieval period, or this link on the «mid-Holocene» period).

Monckton makes the standard attack on the Mann «hockey stick» temeperature reconstruction and then asserts that the Medieval Warm Period (MWP) was «up to 3 oC warmer than now».

But now we've got significantly more CO2 in the atmosphere than there was even during the warm periods, and climate scientists have some hints that we're actually at the highest levels in perhaps 15 million years.

peak temperatures of the mediaeval warm period were warmer than those of the last few decades of the 20th century»?

In his Figure 5 under a section entitled «A New Northern Hemisphere Summer Temperature Record» he shows that the mid to late 20th century temperature as determined from tree ring analysis is far warmer than any period in the past that his analysis includes (this only goes back to 1400 AD).

Lord Monckton really wants the Medieval Warm Period to have been warmer than today, and will latch onto any piece of «evidence» that seems to support this.

«A major question is whether current global temperatures are warmer than the Medieval Warm Period — and whether that event was global or regional.

Second, because the 1900 - 1950 TSI value was lower than the 1950 - 2000 TSI value, this would induce by alone a solar induced climate warming of the atmosphere during 1950 - 2000 even if during the period 1950 - 2000 the sun was perfectly constant.

Eleven states across the West were much warmer than average for the December - February period, with Arizona, California, Nevada, Oregon, Utah, and Washington being record warm.

Following its warmest year on record in 2013 and third warmest in 2014, 2015 remained warm in Australia, with the country experiencing its fifth highest nationally - averaged annual temperature in the 106 - year period of record, with a mean temperature 0.83 °C (1.49 °F) higher than the 1961 — 1990 average, according to the Bureau of Meteorology.

The State of the Climate November 2015 report noted that in order for 2015 to not become the warmest year in the 136 - year period of record, the December global temperature would have to be at least 0.81 °C (1.46 °F) below the 20th century average — or 0.24 °C (0.43 °F) colder than the current record low December temperature of 1916.

= The idea of a global or hemispheric «Medieval Warm Period» that was warmer than today however, has turned out to be incorrect.

Beginning in the mid-1970s, the equatorial Pacific Ocean began a period of warmer than normal sea - surface temperatures.

Periods of volcanism can cool the climate (as with the 1991 Pinatubo eruption), methane emissions from increased biological activity can warm the climate, and slight changes in solar output and orbital variations can all have climate effects which are much shorter in duration than the ice age cycles, ranging from less than a decade to a thousand years in duration (the Younger Dryas).

Global mean temperature for the period January to September 2017 was 0.47 ° ± 0.08 °C warmer than the 1981 - 2010 average (estimated at 14.31 °C).

About 120,000 years ago, in the warm period that preceded our most recent ice age, modern type Homo sapiens was probably walking around Africa with dark skin — and sporting a brain that was three times larger than before the first ice age chatters 2.5 million years ago.