Posts Tagged ‘UV Rays’
Intensity of UV radiation haven’t enhanced too much since last many years
- UV radiation
Over the last 30 years, the UV radiations that reach to the surface of the Earth have been increased slightly. It has actually been concluded by the scientists at NASA who have been continuously analyzing that how much amount of the UV radiations has reached the surface of the Earth in past 30 years. The scientists are of the view that the major reason that is responsible for the increasing UV radiations is that the level of the stratospheric ozone has decreased tremendously as it is the natural sunscreen of the Earth and shields the surface of Earth from the UV radiations that are quite harmful.
It has also been discovered by the scientists that the mid-and-high latitudes are the places where there is the largest increase in the ultraviolet radiations. While on the other hand, in the tropical regions there is either no or little increase in the amount of UV radiations.
The conclusions that have been derived from this research have also shown that there has been a stabilizing effect in the levels of the ultraviolet radiations since 1987. The reason responsible for this is that the countries started to sign a treaty at international level due to which the emission of the gases that deplete ozone has become limited. It has also revealed that the cloudiness that has increased in southern hemisphere in last 30 years has also impacted the ultraviolet radiations.
It has also been stated by the scientists that it is true that the UV radiations have increased in last 30 years but still this increase is moderate. The said that the case could be much worse and this shows that, regarding ozone, world is following the right track.
Despite of the fact that most of the results are positive still there are some negative aspects as well. For example in the southern regions of South America and in Patagonia the increase in the ultraviolet radiations is above 20 percent.
But still a good thing that has been revealed by this research is that the levels of the UV radiations have continuously been falling since mid 1990s.
So the stats have shown that the situation is not much alarming and if the conscious steps are taken the situation can be handled and the surface of the Earth can be saved from the danger of the ultraviolet radiations.