1 In some months, the Ides is on the 15th, and in others, it is the 13th. 2  It's supposed to be on the day of the full moon. [See Roman Calendar.]. 3  March's Ides marked the beginning of the consular year: The two annually-elected Roman consuls took office on the Ides from c. 220 B.C. to 153.
In the case of Mount Pinatubo, the result was a measurable cooling of the Earthâs surface for a period of almost two years. Because they scatter and absorb incoming sunlight, aerosol particles exert a cooling effect on the Earthâs surface.The Pinatubo eruption increased aerosol optical depth in the stratosphere by a factor of 10 to 100 times normal levels measured prior to the eruption.ecause they scatter and absorb incoming sunlight, aerosol particles exert a cooling effect on the Earthâs surface. The Pinatubo eruption increased aerosol optical depth in the stratosphere by a factor of 10 to 100 times normal levels measured prior to the eruption.
Eruption of Mount Pinatubo in the Philippines Asian Disaster Reduction Center Impact on natural resources Moreover, the eruption had caused massive damage to natural resources. It had buried about 18,000 hectares of forest land in ash falls of about 25 centimeters.reas and populations affected During the eruption of 15 June 1991, heavy ash falls had caused widespread damage in the provinces adjacent to Mount Pinatubo, as they covered large tracts of land and caused the roofs of houses, buildings and public facilities to collapse.