Sentences with phrase «when global temperatures»

And this appears exactly when global temperatures are taking a pause or a little reverse.

-- During the period 1941 - 1975, when global temperatures cooled, giving rise to concerns of a looming ice age, there were 11 years of moderate - to - severe drought.

When global temperatures increase, the oceans give up some of their CO2, outgassing it into the atmosphere and increasing atmospheric concentrations.

The assumption that the rate of change of sea level rise from those components that were small during the 20th century and which have been attributed to ice sheets would scale with global temperature change leads to a strong and unlimited amplification of future sea level rise when global temperatures continue to increase.

If CO2 were accumulating in the atmosphere to any significant degree since the onset of the industrial revolution, then why wouldn't it have been overwhelming aerosol particulates after 1940, when global temperatures ceased to rise for roughly 40 years?

These coincided with periods when global temperatures were lower than average, though why is a matter of debate.

Dr. James Hansen said at a July 20 press conference that average global temperatures today are less than a degree cooler than they were during the last major interglacial or «Eemian» period 120,000 years ago, when global temperatures were just 2 °C above the pre-industrial climate and sea levels stood at five to nine metres higher than they are today.

And when global temperatures fall global CO2 levels are very likely to fall with them since atmospheric CO2 levels are determined largely by global temperatures.

England suffered a record drought and heatwave in 1976, when global temperatures were at a postwar low.

The rise of CO2 that led to this dramatic acidification occurred during the Paleocene - Eocene Thermal Maximum (PETM), a period when global temperatures rose by around 5 °C over several thousand years and one of the largest - ever mass extinctions in the deep ocean occurred.

That conclusion is based not on climate models or recent trends in forest fires, but rather on records of forest fires that occurred more than a millennium ago, during the Medieval Climate Anomaly, a period when global temperatures were comparable to what they are today, and about half a degree warmer (on the Celsius scale) than they had been for several centuries prior.

Therefore we can work backward in time to estimate what he reckons atmospheric CO2 would be at the time of the last Ice Age (glacial maximum), a time when global temperatures were about 4 - 6 °C cooler than now.

In the 1970s, when global temperatures were cooling, some scientists could not resist the lure of press attention by arguing that a new ice age was imminent.

We can also observe in the various temperature / time graphs, periods when global temperatures are rising, or have risen.

These upward spikes in global temperatures, Figure 2, call attention to El Nino events during periods when global temperatures are rising.

And when global temperatures are getting as low as they have been in nearly three decades, predicting «a cold spell» is no work of genius, and neither is the «prediction'that it will get warm again... at some point.

Who remembers today, they query, that in the 1970s, when global temperatures began to dip, many warned that we faced a new ice age?

To figure that out, scientists have been looking back to the end of the last ice age, about 11,000 years ago, when global temperatures stood at roughly their current levels.

They also looked at a period when global temperatures dropped 11 to 12 degrees over a period 52 million to 34 million years ago.

Peak temperature arguments imply that bad things happen when global temperatures reach a certain threshold but their severity is independent of the path taken too reach that threshold.

The Holocene maximum was a period about 5,000 years ago when global temperatures were about 1» C above the recent historical norms.

But since that did not happen AGW «science» may have changed it's position much like the term «global warming» was changed to «climeate change» when the global temperatures stopped rising a few years ago.

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.

Zachos... is a leading expert on the episode of global warming known as the Paleocene - Eocene Thermal Maximum (PETM), when global temperatures shot up by 5 degrees Celsius (9 degrees Fahrenheit).

This warm phase had begun in the Cretaceous period, peaked in the early Eocene, and continued to the end of the Eocene, when global temperatures dropped and ice sheets formed over the Antarctic.

Around 3 million years ago, when global temperatures were about as warm as they're expected to be later this century, oceans were dozens of feet higher than today.

By Matt Vooro The current year 2011 is a good example of what happens when global temperatures drop and we have cold and snowy winters that stretch well into spring.

Zachos... is a leading expert on the episode of global warming known as the Paleocene - Eocene Thermal Maximum (PETM), when global temperatures shot up by 5 degrees Celsius (9 degrees Fahrenheit).

Those winds coincided with a period, from 1910 to 1940, when global temperatures rose faster than could have been caused by greenhouse gas pollution alone, given the still - nascent state of mass industrialization.

However, even these warm - blooded groups took to the water when global temperatures were higher than now.

January through August of 1998 are all in the 14 warmest months in the satellite record, and that El Niño started when global temperatures were somewhat chilled; the global average temperature in May 1997 was 0.14 C (about 0.25 degrees F) cooler than the long - term seasonal norm for May.

Turning up the heat seems to increase the rate at which the plants produce methane, Keppler says, which could explain why atmospheric levels of methane were high hundreds of thousands of years ago when global temperatures were balmy.

Todd Dawson, professor of integrative biology at the University of California - Berkeley, said the research provides a holistic understanding of tree die - off at a time when global temperatures — and possibly drought conditions — are expected to rise.

That's what researchers found when they looked back 56 million years, during a time when global temperatures increased about 6 ° for a period of 20,000 years.

The world experienced the reverse — a prolonged negative phase — from 1947 - 1976, when global temperatures stalled.

According to Rupp's models, such a severe heatwave is now 20 times more likely in a La Niña year than it was in the 1960s, when global temperatures were significantly cooler.

This may have helped offset greenhouse warming from about 1940 to 1980, when global temperatures rose little before rising steeply.

The reverse — a prolonged negative phase, or La Tia — occurred from 1947 - 1976, when global temperature rise «stalled.»

When the global temperature increases, Arctic ice melts faster.

«In the Eemian (the last interglacial period 120,000 years ago, when the global temperature was higher by 1 - 2 °C»

Why is that we see a reccord high sea ice level in the Antarktic area when global temperature is rising.

But the boiling point of heavy water, as well as heavy oxygen water (H2O ^ 18 rather than H2O ^ 16) are higher than that of normal water, and are found in water vapor in the atmosphere at lower concentrations when the global temperature is low.

When the global temperature is high, more heavy water evaporates around the world than when it's cold.

Don't tell me we have had accelerated warming in the last decade, when global temperature readings say just the opposite.

In tandem with the Paris agreement, the Conference of Parties (COP) invited the IPCC to provide a special assessment on the impacts of climate change when global temperature reaches 1.5 °C above pre-industrial levels.

Although more efficient or higher energy star rating houses may experience less absolute changes in energy requirement due to changing climate, they appear to have greater percentage changes in H / C energy demand, especially in regions with a H / C balanced temperate climate such as in Sydney where the increase is projected to be up to 120 % and 530 % for high star rating houses when the global temperature increases 2 °C and 5 °C respectively, potentially posing significant pressures on the capacity of local energy supply

Not exact matches

«When countries adopted the historic Paris Agreement to limit global temperature rise, they also recognized that achieving that goal would take broad - based global climate action in all sectors, public and private,» she said.

But when tree rings, pollen counts in polar ice, and temperature records from multiple places around the world all point in the same direction, we become increasingly confident that global warming is a reality.

But when our industry would not be responsible for the raise in global temperature, that chain of reasoning would be irrelevant:

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.