We don't know all ordsprog

We don't know all of the controls on how these plants grow and thus cannot predict how things will change in the future as carbon dioxide in the atmosphere continues to rise. For example, seldom do people go to sea to find out what is happening in the wintertime. We did just that.

Jim Bishop (1907-1987)

That just a forcing function though. To really understand the carbon cycle, you have to look at the circulation, biology and chemistry of the oceans where the carbon dioxide goes, the photosynthesis of plants as they breath carbon dioxide, the decomposition of plants, and many other forces.

[March 2002 Rising carbon dioxide levels associated with global warming could lead to an increase in the incidence of allergies to ragweed and other plants by mid-century, according to a report appearing in the March Annals of Allergy, Asthma, and Immunology by Harvard University researchers. The study found that ragweed grown in an atmosphere with double the current carbon dioxide levels produced 61 percent more pollen than normal. Such a doubling of atmospheric carbon dioxide is expected to occur between 2050 and 2100.] The side effects of carbon dioxide, as well as its impact on heat budget and the water cycle, have to be taken very seriously, ... I believe this study can help us understand the true costs of burning fossil fuels.

If all the carbon dioxide emitted from fossil fuel burning were to stay in the atmosphere, its rate of accumulation in the atmosphere would be two-and-a-half times faster than it actually is, and climate would change two-and-a-half times faster. Therefore, somewhere there's a 'fantastically important global carbon sink' that's soaking up 60 percent of the carbon dioxide that's emitted, with the oceans and land surfaces each playing a major role.

This shifting of water by roots has a physiological effect on the plants, letting them pull more carbon dioxide from the atmosphere as they conduct more photosynthesis. Because this has not been considered until now, people have likely underestimated the amount of carbon taken up by the Amazon and underestimated the impact of Amazonian deforestation on climate.

The delegates in Buenos Aires have to be reminded that climate change is not something which will happen in the future, it is happening now, most dramatically in the Arctic. The main cause is clear and undisputed. Increased carbon dioxide in the atmosphere due to the burning of fossil fuels is accepted as the main cause of climate change by all scientists save those working for the fossil fuel industry. Polar bears may be some of the earliest victims, but the rest of us are not far behind.

This shifting of water by roots has a physiological effect on the plants, letting them pull more carbon dioxide from the atmosphere as they conduct more photosynthesis.

The rapid release of carbon dioxide into the atmosphere, happening today, appears to have happened in the past, too.

There's this skin on the Earth - plants - that has an effect on a global scale, pulling carbon dioxide out of the atmosphere and letting water go, in a dynamic way that has climatic implications.

Selective logging negatively impacts many plants and animals and increases erosion and fires. Additionally, up to 25 percent more carbon dioxide is released to the atmosphere each year, above that from deforestation, from the decomposition of what the loggers leave behind.

Businesses know carbon dioxide will be regulated in the future and would rather make it part of the cost to build a new plant now rather than wait and have to add technology. These plants are 40- to 50-year investments.

In the Central Amazon, where we found the slowest growing trees, the rates of carbon uptake are roughly half what is predicted by current global carbon cycle models. As a result, those models—which are used by scientists to understand how carbon flows through the Earth system—may be overestimating the forests' capacity to remove carbon dioxide from the atmosphere.

[If the role of sulfur cooling proves to be large, and this is still far from certain, some researchers say it could be necessary to continue burning fossil fuels in order to produce sulfur dioxide to fight the carbon dioxide-driven warming.] I would not be surprised if somebody suggested concentrating fossil fuel power plants on the eastern margins of continents, which would put a lot of sulfates into the atmosphere, which would rain out over the oceans, which have a tremendous capacity to absorb acidity, ... This plan would make sense because the prevailing winds blow from east to west.

Patrick Michaels

It's a valuable new piece of information. Understanding why carbon dioxide varied in the last glacial maximum is the most important question facing us. Melina Tufvesson er en av Sveriges dyktigste ergonomispesialister. If we can't explain the recent past 18,000 to 20,000 years ago, then we can't be confident of our ability to predict the future.

The AGGI will serve as a gauge of success or failure of future efforts to curb carbon dioxide and other greenhouse gas increases in the atmosphere both by natural and human-engineered processes.

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