Sentences with phrase «levels in the atmosphere»

We know that the surface temperature worldwide is rapidly increasing, that the carbon dioxide levels in the atmosphere are at their highest levels in at least 200,000 years.

You do realize that it was less than 1 million years ago when the CO2 levels in the atmosphere were thousands of times greater than they are now?

In addition to the effect on soil from tilling, emissions from the farm tractors increases carbon dioxide levels in the atmosphere.

How much warming will there be if we, say, double CO2 levels in our atmosphere?

Without this fixed nitrogen, phytoplankton could not absorb carbon dioxide from the air, a feat which is helping to check today's rising carbon dioxide levels in the atmosphere.

Two U.N. reports this month said greenhouse gases had reached record levels in the atmosphere and a warming world would likely bring more floods, stronger cyclones and more intense droughts.

The Carbon cycle is a geological process that regulates the CO2 - level in the atmosphere and with that, the temperature of the planet's surface: In the ocean, CO2, in its dissolved form, undergoes a chemical reaction and is then transported into Earth's mantle.

By accounting for both CO2 and oxygen levels in the atmosphere, scientists have calculated that oceans and plants each absorb roughly one - quarter of humanity's CO2 emissions, leaving half to build up in the atmosphere.

Now, research from the University of Missouri suggests that even as rising carbon dioxide levels in the atmosphere drive the climate toward warmer temperatures, the weather will remain predictable.

Like the biota * of Ediacara in Australia, whose emergence coincided with a sudden increase in oxygen levels in the atmosphere 800 million years ago, the appearance and diversity of the biota in Gabon corresponds to the first peak in oxygen observed between — 2.3 and — 2 billion years ago.

Floodplains help combat the effects of climate change by storing carbon, Hogan said, lowering carbon levels in the atmosphere.

Puget Sound is becoming more acidic thanks to a combination of agricultural runoff and rising carbon dioxide levels in the atmosphere

Biologists at UC San Diego have solved a long - standing mystery concerning the way plants reduce the numbers of their breathing pores in response to rising carbon dioxide levels in the atmosphere.

The U.S. EPA is considering stiffening standards for the ocean acidification caused by rising carbon dioxide levels in the atmosphere

Scientists believe that the different pattern of deep ocean circulation was responsible for the elevated temperatures 3 million years ago when the carbon dioxide level in the atmosphere was arguably what it is now and the temperature was 4 degree Fahrenheit higher.

The research focused on a time that marked a change between a period of high carbon - dioxide levels in the atmosphere similar to modern day and much lower levels similar to the period before the industrial revolution, Pullen said.

By 1900, carbon dioxide levels in the atmosphere had begun to rise steadily, reaching 340 parts per million last year.

Cantwell said that the science underway at DOE will be critical to understanding the impacts of the rising greenhouse - gas levels in the atmosphere — from Arctic sea - ice melt to ocean acidification — and maintaining US leadership in clean - energy technologies.

As carbon dioxide levels in the atmosphere increase, the seas absorb greater amounts of the gas, which reacts with water to form carbonic acid.

Around 50 million years ago, in contrast, oxygen levels in the atmosphere measured 23 percent — 2 percent higher than today.

Methane levels in the atmosphere were just 650 parts per billion a century ago, versus 1800 ppb today.

Professor Andrew Scott, one of the lead authors, said: «High oxygen levels in the atmosphere at this time has been proposed for some time and may be why there were giant insects and arthropods at this time but our research indicates that there was a significant impact on the prevalence and scale of wildfires across the globe and this would have affected not only the ecology of the plants and animals but also their evolution.»

In the global effort to mitigate carbon dioxide levels in the atmosphere, all options are on the table — including help from nature.

The fertilizers farmers use on their crops today may become less efficient if carbon dioxide levels in the atmosphere keep rising.

Although rising CO2 levels in the atmosphere can benefit tree growth, the associated rising temperatures can trigger droughts that kill trees, which in turn dampens CO2 removal from the atmosphere.

Although rising CO2 levels in the atmosphere can benefit tree growth, the rising temperatures associated with climate change can trigger droughts that kill trees, which dampens CO2 removal from the atmosphere.

Carbon dioxide levels in the atmosphere continue to rise thanks to dirtier economies and a weakening in natural systems» ability to remove the greenhouse gas

After the Geneva meeting, he claimed that Pearce's work shows that a doubling of carbon dioxide levels in the atmosphere by the middle of the next century would cause damage from climate change valued at between 1.5 and 2 per cent of «gross world product».

Here on Earth, we had lots of water but no widespread deposits of manganese oxides until after the oxygen levels in our atmosphere rose.»

After all, carbon dioxide levels in the atmosphere continue to go up and up and up, which suggests that the pH of seawater will continue to fall and fall and fall.

Oxygen levels in the atmosphere did not rise until at least 400 million years after the origin of oxygen - producing bacteria.

Carbon dioxide (CO2) levels in the atmosphere — 379 parts per million (ppm) in 2005 — have reached levels not seen in the last 650,000 years, which have varied between 180 ppm and 300 ppm.

It showed that our planet's temperatures have always changed in lockstep with greenhouse gas levels in the atmosphere.

TIPPING POINT A new record of the Antarctic ice sheet's formation suggests that carbon dioxide levels in the atmosphere could soon reach a tipping point that will make the ice sheet more vulnerable to melting.

A fuel made from palm oil turns out to be worse for greenhouse gas levels in the atmosphere than jet fuel refined from petroleum because it involves clearing rainforest or peatland.

Since the beginning of the industrial age in the 19th century, CO2 levels in the atmosphere have increased from 280 parts per million to 380 ppm.

The researchers are working to construct a record of carbon dioxide levels in the atmosphere over the last 100,000 years.

A manmade volcano erupting continuously to shade the Earth until greenhouse gas levels in the atmosphere are brought down.

El Niño — a warming of tropical Pacific Ocean waters that changes weather patterns across the globe — causes forests to dry out as rainfall patterns shift, and the occasional unusually strong «super» El Niños, like the current one, have a bigger effect on CO2 levels in the atmosphere.

Thanks to industrialization, mercury levels in the atmosphere are at least three times higher than they were 150 years ago, and mercury levels in ocean surface waters are higher too.

Water is a major greenhouse gas too, but its level in the atmosphere depends on temperature.

CO2 concentrations would start to fall immediately since the ocean and terrestrial biosphere would continue to absorb more carbon than they release as long as the CO2 level in the atmosphere is higher than pre-industrial levels (approximately).

Ice cores drawn from Antarctica and Greenland have shown that carbon dioxide (CO2) levels in the atmosphere began to rise at roughly the same time as the vast ice sheets began to melt.

So the characteristic level in the atmosphere which emits to space gets higher (and therefore colder).

«The magnetic field does that at a higher level in the atmosphere, but the gravity field tells us that it's going on a lot deeper, in the middle of the planet, or even deeper than that,» Bolton says.

For these tests, they had a computer double CO2 levels in the atmosphere.

Since industrial CO2 emissions were massively higher between 1850 and 1900 than any period up to 1850, it's hard to believe that 1850 CO2 levels in the atmosphere were any more than 285 ppm.

Dust levels in the atmosphere were up to 25 times higher than present, reflective of much lower levels of precipitation in most places.

To do that, you have to have CO2 levels in the atmosphere below 450 - 500 parts per million.

The Snowball Earth hypothesis maintains that the severe freezing in the late Proterozoic was ended by an increase in CO2 levels in the atmosphere, and some supporters of Snowball Earth argue that it was caused by a reduction in atmospheric CO2.