Confidence of older people is that even before the sun was shining brighter than it is now, as it turns out, has a more than reasonable grounds. British scientist Dr. Garry Stenhill (Gerry Stanhill) based on analysis of long-term records found that the amount of sunlight reaching the Earth's surface, continuously and rapidly declining. According to BBC, Dr Stenhill, currently working in Israel, back in 2001, called this phenomenon "global dimming" (global dimming).
Comparing the data on the total amount of solar radiation reaching the Earth's surface, for the period from the 1950s to the present day, Dr. Stenhill found that the decline was quite markedly — by 22%. Moreover, this trend does not have a local character — a comparison of observations made in different regions of the world, gives a broadly similar picture. In the USA, sunlight "tarnished" by 10%, in the Soviet Union — by almost 30% in the British Isles — 16%. In general, the amount of sunlight reaching the earth is reduced by 2% every decade since the 1950s and up until the 1990s.
The mechanism and consequences of this phenomenon have been studied insufficiently. Perhaps the phenomenon "global dimming" caused by air pollution planet products human industrial activity. Air pollution, dust particles leads to the reflection of solar radiation back into space, and in particular, a change in the optical properties of clouds. The dust particles act as centers of condensation of water vapor, resulting in the droplets in clouds of dust particles containing more than usual, which in turn contributes to increased reflection of solar radiation.
The theory of Dr. Stenhilla, initially greeted with disbelief by the scientific community, has recently been confirmed by his Australian counterparts, who had come to similar conclusions using totally different accounting treatment of solar radiation. Experts have sounded the alarm.
A number of scientists have been suggestions that "global dimming" could lead to significant changes in climate processes on the planet and in the circulation of the atmosphere. So, perhaps that is the reason it terrible drought that hit the region in the Sahara 1970 — 1980 and led to hundreds of thousands of victims. There is reason to believe that something like this happening before our eyes to Asia, where almost half the world's population. "In my opinion, global dimming has a devastating impact on the Asian monsoon, — said University of California (San Diego) Virhabhadran Ramanathan (Veerhabhadran Ramanathan). — We are talking about billions of people."
A very disturbing fact is that this effect contributed to a significant underestimation of the true scale of the greenhouse effect, leading to warming. Scientists have long noted the discrepancy between the amount of solar energy absorbed in the atmosphere due to the presence of an excess of nitrogen dioxide in it, and a relatively small increase in average temperature — 0.6 degrees. British scientist revealed "darkening effect" rendering the opposite effect may substantially conceal the greenhouse effect. This, in turn, may mean that the climate is much more sensitive to the greenhouse effect than previously thought. If this is true, then it is very bad news, according to Dr. Peter Cox (Peter Cox), a leading expert on climate modeling. The fact is that just in the last decade, carbon dioxide emissions that cause the greenhouse effect, has increased dramatically, while the emission of dust particles, resulting in the opposite direction of the effect of "global dimming", managed to bring under control.
"We find ourselves in a situation in which the allocation of" cooling "air pollution is on the decline, and the" heating "it grows, — he said. — This means a reduction in the cooling effect of a simultaneous increase of the heating, and it is a big problem."
Even the most pessimistic forecasts of global climate seems to have to adjust to the worst side of humanity. Increase in the average temperature of 10 degrees in 2100, is more than real. Significant areas of the world, perhaps, destined to become uninhabitable.
Category: Scientists, experts, science