Sentences with phrase «year period of warming»

The left backed away from global warming and replaced it with the more general climate change to try to cope with the 18 year period of no warming and steady temps.

al., 2005, Ljungqvist, 2009 or even Mann et al., 2008, you can see that the last 2 - 3 cycles of this oscillation have had periods of ~ 1,000 years... Alternating 400 - 500 year periods of warming and cooling.

How does this relate to the apparently predictable and patterned air temperature change recorded since 1880 (alternating 30 year periods of warming and pause in warming)?

Not exact matches

During the first third of the year, from January through April, the average temperature for the contiguous United States was 4 degrees Fahrenheit above the 20th - century average, making this period the second warmest on record, according to the National Oceanic and Atmospheric Administration.

There was no explanation of why both the medieval warm period and the little ice age, very clearly shown in the 1990 report, had simply disappeared eleven years later.

During the period from about three to six years, children normally establish an especially warm, close relationship with the parent of the other sex.

Notably, the rise and expansion of both the Indus Valley civilization (from about 5350 years to about 4600 years ago) and the Vedic civilization (from about 3450 years to about 3100 years ago) occurred during periods when climate was relatively warm, wet, and stable.

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.

Researchers from the Niels Bohr Institute have analysed the natural climate variations over the last 12,000 years, during which we have had a warm interglacial period and they have looked back 5 million years to see the major features of the Earth's climate.

For the last 2.5 million years, Earth settled into a rather unusual period of potential instability as we rocked back and forth between ice ages and intervening warm periods, or interglacials.

The additional warming caused a near - doubling of melt rates in the twenty - year period from 1995 to 2015 compared to previous times when the same blocking and ocean conditions were present.

New research could explain why the Arctic was much warmer during a period millions of years ago that scientists say most closely resembles Earth's climate today

For a start, observational records are now roughly five years longer, and the global temperature increase over this period has been largely consistent with IPCC projections of greenhouse gas — driven warming made in previous reports dating back to 1990.

But they've been especially interested in the most recent period of abrupt global warming, the Bølling - Allerød, which occurred about 14,500 years ago when average temperatures in Greenland rose about 15 degrees Celsius in about 3,000 years.

«We had a near - record warm April - May period, prolonging the effects of July [2009] drought and a low snow year.»

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.

The researchers detected a «significant regional flux» of methane, a greenhouse gas with about 30 times the warming potential of carbon dioxide over a 100 - year period, coming from an area of gas wells in southwestern Pennsylvania.

The Australian small carpenter bee populations appear to have dramatically flourished in the period of global warming following the last Ice Age some 18,000 years ago.

Instead, the fossil record indicates they vanished during the Earth's glacial - interglacial transition, which occurred about 12,000 years ago and led to much warmer conditions and the start of the current Holocene period.

Jacobson said the sum of warming caused by all anthropogenic greenhouse gases — CO2, methane, nitrous oxide, chlorofluorocarbons and some others — plus the warming caused by black and brown carbon will yield a planetary warming effect of 2 degrees Celsius over the 20 - year period simulated by the computer.

Heavier rainfall at the study sites from the year 0 to 400, and again during Europe's Medieval Warm Period, just before the Little Ice Age from about the year 800 to 1300, was probably caused by a centuries - long strengthening of El Niño.

It is also the longest period of globally stable climate and sea level in at least the last 400,000 most recent years of seesaw between glaciation and warmer times.

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.

In the Ozarks, glades often help to preserve isolated communities of cacti and other desert and prairie species that dominated the area during the Hypsithermal, a period of warming that occurred four to eight thousand years ago.

The study was based on reconstructions and climate modelling of a period of global warming 56 million years ago.

From the height of the last glacial period 21,000 years ago to our current interglacial period, the Earth has warmed by an average of five degrees Celsius.

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.

The Holocene Climate Optimum was a period of global climate warming that occurred between six to nine thousand years ago.

The surge in melt events corresponds to a summer temperature increase of at least 1.2 - 2 degrees Celsius (2.2 - 3.6 degrees Fahrenheit) relative to the warmest periods of the 18th and 19th centuries, with nearly all of the increase occurring in the last 100 years.

The period of intense climate warming, related to the emplacement of large amounts of basalt of the Siberian Traps and which we previously thought was responsible for the extinction of marine species, in fact happened 500,000 years after the Permian - Triassic boundary.

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.

While a 16 - year - period is too short a time to draw conclusions about trends, the researchers found that warming continued at most locations on the planet and during much of the year, but that warming was offset by strong cooling during winter months in the Northern Hemisphere.

«We found compelling evidence that invasive shrubs, such as Japanese barberry, are ready to leaf out quickly once they are exposed to warm temperatures in the lab even in the middle of winter, whereas native shrubs, like highbush bluberry, and native trees, like red maple, need to go through a longer winter chilling period before they can leaf out — and even then their response is slow,» says Amanda Gallinat, a second - year graduate student and third author of the paper.

The samples» ratios told him the camel roamed 3.8 million years ago and the beavers set up their dam 3.4 million years ago, give or take half a million years — age ranges accurate enough to place them in the middle of the mid-Pliocene warm period.

Bowen and colleagues report that carbonate or limestone nodules in Wyoming sediment cores show the global warming episode 55.5 million to 55.3 million years ago involved the average annual release of a minimum of 0.9 petagrams (1.98 trillion pounds) of carbon to the atmosphere, and probably much more over shorter periods.

But Rybczynski and her colleagues have unearthed evidence of a balmier Arctic from a slice of time referred to as the mid-Pliocene warm period, roughly 3 million to 3.3 million years ago.

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.

At last week's meeting here of the Society of Vertebrate Paleontology, another team of U.S. - based researchers looked at a slightly later but somewhat less severe warming period, which happened about 53 million years ago.

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.

Under the model they developed, the scientists say the likelihood of Bd occurrence is predicted to decrease during warmer periods, and when precipitation exceeds an annual rainfall threshold above 1,800 mm per year.

The core reaches only as far back as the latter part of the Pleistocene epoch, when Earth began cycling between warm and cold periods every 100,000 years.

New research shows that over the last 30 years, a genetically controlled trait — the winter dormancy period — of a species of mosquito has shrunk as Earth has warmed up.

DeConto and Pollard's study was motivated by reconstructions of sea level rise during past warm periods including the previous inter-glacial (around 125,000 years ago) and earlier warm intervals like the Pliocene (around 3 million years ago).

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.

At approximately 90 million years old, the bird fossils are among the oldest avian records found in the northernmost latitude, and offer further evidence of an intense warming event during the late Cretaceous period.

But they looked for 50 - year - long anomalies; the last century's warming, the IPCC concludes, occurred in two periods of about 30 years each (with cooling in between).

When he lined up their ages with global climate records, he noticed a pattern: Many species of megafauna seemed to disappear during a period of extreme warming around 12,300 years ago, Cooper and his team write today in Science Advances.

The sediment cores used in this study cover a period when the planet went through many climate cycles driven by variations in Earth's orbit, from extreme glacial periods such as the Last Glacial Maximum about 20,000 years ago, when massive ice sheets covered the northern parts of Europe and North America, to relatively warm interglacial periods with climates more like today's.

Once released through combustion, it remains in the atmosphere for hundreds, even thousands, of years and continues its job as a driver of global warming over a long period of time.