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Global warming: scientists are divided into pessimists and optimists

May 24 2006
18:41

Can I restore the damaged ecological environment? Scientists in the affirmative when asked. True, this requires time and commitment of the entire human community. Time still is, but the global desires are not observed. Meanwhile, problems in the environmental field only adds, and should give credit to researchers who do not leave them unattended.

The largest Japanese scientist, one of the leading experts in the field of permafrost, Professor Masami Fukuda of Hokkaido University conducted a study, which found that forest fires in Siberia and Alaska, turning these regions into a source of global warming, even though previously they processed a significant portion of carbon gas on the planet.

In Siberia only in 2003, burned 23 million hectares of taiga. During field studies professor Fukuda found that in Siberia during smoldering leaves and topsoil is allocated to four times more carbon dioxide than it absorbs when placed in the same trees.

In addition, the loss of the taiga also leads to the gradual melting of permafrost and atmospheric emissions of methane contained in the soil of northern areas. Methane, in turn, gives the greenhouse effect and influence on the atmosphere is twenty times stronger than carbon dioxide.

According to forecasts of climate scientists from Tomsk State University, the pace of global warming may increase dramatically due to the rapid melting of permafrost in Western Siberia.

Western Siberia heats up faster than anywhere else on the planet. Over the past 40 years, the temperature there has increased by nearly 3 degrees. In the process of thawing permafrost provides a clean ground, which heats up faster than ice and snow than accelerates the thaw.

Siberian peat bogs produce methane from its inception at the end of the last glacial period, but much of this gas is kept as permafrost.

Even if methane is leaking from the permafrost over the next hundred years, each year it will add to the environment about 700 million tons of carbon. Content in the atmosphere of this gas will double, causing global warming by 10-25%.

Emitted into the atmosphere all sorts of chemicals remains a major environmental problem. For example, a group of Japanese scientists led by Eiji Akiyoshi of the National Institute for Environmental Studies (Tokyo) said reducing the levels of chlorofluorocarbons in the atmosphere that deplete the ozone layer.

Based on the data created a series of digital models of chlorofluorocarbons emissions, according to which the Antarctic ozone hole begins to shrink in the near future. According to researchers, the process of "tightening" of the ozone layer that protects the planet from harmful ultraviolet radiation, will begin in 2020. By 2050, the hole can be finally disappear.

Constantine Woodpeckers

Adapted from: ITAR-TASS and Utro.ru

Константин Дятлов

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