Sentences with phrase «high carbon dioxide levels in»

This explains why the very high carbon dioxide levels in geologic history never caused any runaway warming It also tells us that burning fossil fuels can not lead to runaway warming like happened on Venus according to Hansen.

High carbon dioxide levels in an indoor workspace can cause drowsiness, headaches, and even affect concentration.

Study participants were exposed to moderately high carbon dioxide levels in other tests, which usually increases the breathing rate and depth.

«Bivalves have been around for a long time and have survived different geologic periods of high carbon dioxide levels in marine environments,» says George Waldbusser, an Oregon State University (OSU) marine ecologist and biogeochemist and lead author of the paper.

The UN estimates that poor nutrition already accounts for around 3 million deaths among young children every year, and experiments show that higher carbon dioxide levels in the atmosphere are associated with protein losses of around 5 %.

Higher carbon dioxide levels in aquatic and marine environments favour algal growth and anoxic environments.

Climate scientists know that the planet is warming, and dangerously, as a consequence of ever higher carbon dioxide levels in the atmosphere thanks to changes humans have made to the planet's atmospheric chemistry — and they know it can get worse.

Not exact matches

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.

New figures from the Carbon Dioxide Information Analysis Center have found that carbon emissions likely hit their highest levels ever in 2010 (the numbers are partially preliminary estimates).

At night, for example, water in the estuary had higher carbon dioxide, lower pH levels, and a lower saturation state from the collective «exhale» of the ecosystem.

But high levels of carbon dioxide in lake waters may dull their senses, leaving the critters open to attack.

Scientists have measured remarkably high levels of carbon dioxide (CO2) in the soil near dead trees on the flanks of California's Mammoth Mountain, a dormant volcano.

Also associated with this event are high levels of carbon dioxide in the atmosphere, which are linked to elevated ocean and atmospheric temperatures.

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.

Fish raised in the more acidic seawater that would result from higher carbon dioxide levels forget to flee predators.

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.

The seven - day rainfall total from Harvey was as much as 40 percent higher than rainfall from a similar storm would have been decades ago, before human activity caused atmospheric carbon dioxide levels to spike, according to a study published yesterday in Geophysical Research Letters.

The amount of carbon dioxide (CO2) in the air is now at its highest level in human history, largely because of coal - burning power plants and vehicle emissions.

In the longest - running experiment of its kind, the plants that were supposed to thrive in higher carbon dioxide levels have instead done less welIn the longest - running experiment of its kind, the plants that were supposed to thrive in higher carbon dioxide levels have instead done less welin higher carbon dioxide levels have instead done less well.

Although plants grown in high levels of carbon dioxide — say, double the current atmospheric concentrations — initially grow rapidly, the growth tapers off within weeks and the plants wind up with a low protein content.

To find out if how the nitrogen is delivered makes a difference, Arnold Bloom, a crop physiologist at the University of California, Davis, and his team monitored the growth of wheat plants raised in high levels of carbon dioxide.

In its later life, «instead of trying to model utopia, Biosphere 2 would actually model dystopia — a future plagued by high carbon dioxide levels,» wrote Rebecca Reider, author of a definitive history of the project.

Previous studies, including work by Cai, have shown that acidification can be particularly serious in nutrient - rich coastal waters which often contain areas with too little oxygen and high levels of carbon dioxide near the bottom.

Researchers at the University of Gothenburg have now revealed that the concentration of nitrogen in plants» tissue is lower in air with high levels of carbon dioxide, regardless of whether or not the plants» growth is stimulated.

«For all types of ecosystem the results show that high carbon dioxide levels can impede plants» ability to absorb nitrogen, and that this negative effect is partly why raised carbon dioxide has a marginal or non-existent effect on growth in many ecosystems,» says Johan Uddling.

Curious how higher - CO2 conditions would affect this ability, researchers placed the animals in water tanks with different levels of carbon dioxide and shone lights at various flickering rates.

«High carbon dioxide levels cause warming in tropics.»

Some scientists are linking the phenomenon to warmer waters and ocean acidification caused by high levels of carbon dioxide in the atmosphere.

Higher carbon dioxide levels change the concentration of ions (electrically charged atoms and molecules) in the fishes» blood, altering the way that the neuroreceptors work.

«If we don't stop burning fossil fuel and cutting down our tropical forests — all those human activities that maintain our society — we're going to reach incredibly high levels of carbon dioxide in our atmosphere.

With higher levels of carbon dioxide and higher average temperatures, the oceans» surface waters warm and sea ice disappears, and the marine world will see increased stratification, intense nutrient trapping in the deep Southern Ocean (also known as the Antarctic Ocean) and nutrition starvation in the other oceans.

«Atmospheric CO2 is not a pollutant, it is in fact the very elixir of life,» Craig Idso, a science adviser to the CO2 Coalition, said during a panel discussion at CPAC exploring the benefits attached to higher levels of carbon dioxide in the atmosphere.

It has been known that high levels of carbon dioxide in the air causes health and environmental hazards, but a new study shows that high concentration of Carbon dioxide might actually be helping plant cycles, resulting to a greener earth.

April will be the first time in human history where levels of atmospheric carbon dioxide were higher than 400 parts per million for an entire month, one scientist who monitors the levels said.

Fish exposed to higher carbon dioxide levels — which are expected to increase in the oceans for several decades — showed impaired cognitive function, learning difficulties, slowed visual capacity and altered sense of smell and sound.

Higher levels of carbon dioxide, however, do have an indirect effect on the ozone layer in the stratosphere.

In the past 150 years, such activities have pumped enough carbon dioxide into the atmosphere to raise its levels higher than they have been for hundreds of thousands of years.

But sharks exposed to the highest level of carbon dioxide spent just 15 per cent of their time in the squid - scented stream.

Ice core records prove that current levels of carbon dioxide and methane, both important greenhouse gases, are higher than any previous level in the past 400,000 years.

And as both researchers made clear, neither idea addresses the rising levels of carbon dioxide (CO2) in the atmosphere that is primarily to blamefor global warming and higher levels of oceanic acid.

«One reason is that when we have high levels of carbon dioxide in our blood, we yawn to inhale more oxygen.

Critics of the technique say that the technique is expensive, that it makes no difference in the amount of carbon dioxide in the blood, that higher levels of carbon dioxide is not an effective strategy, and that any effects of the technique may be due to general relaxation.

A story in the May 1, 2002, issue of Education Week about air quality in schools («EPA Pushing Improved Air Quality in Schools») should have said that the Mesa, Ariz., school district tested classrooms for high levels of carbon dioxide.

He says ``... concentrations of carbon dioxide in the atmosphere eventually would reach levels higher than in the Pliocene era, more than 2.5 million years ago...» Surely this is an error.

That is what they are called by independent environmentalists researching the role of power companies responsible for the highest levels of carbon dioxide emissions in the United States.

«A year ago, many meteorologists predicted that higher levels of carbon dioxide in the atmosphere would make the year 2007 the hottest in the last decade, but, fortunately, these predictions did not become reality.

But when they studied young white sea bass raised in tanks with seawater with high carbon dioxide levels, they saw the opposite effect: These fish experienced unusually extensive growth of their otoliths compared with fish raised in water with normal levels of carbon dioxide.

Dr. Patrick J. Michaels... pointed out that carbon dioxide levels in the atmosphere had been higher for 90 million of the last 100 million years.

In fact, there is an accumulating body of reviewed, published research shaving away the high end of the range of possible warming estimates from doubled carbon dioxide levels.

In fact, that all things green love carbon - dioxide rich environments is the ONLY thing we KNOW about the effects of increase CO2 levels, other than the fact that higher and higher levels of CO2 produce increasingly lesser and lesser amounts of heating due to the «greenhouse effect».