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.
TOMS Images from El Chichon and Mt. Pinatubo. This composite shows false-color images of the SO2 clouds on the second day after each eruption. Following the devastating eruption of Mt. Pinatubo in the Philippines in June 1991 there has been a resurgence of interest in the global effects of volcanism.Mt. Pinatubo was the second largest eruption of this century and produced approxmately 10 cubic kilometers of rock and ash (called tephra by volcanologists).OMS Images from El Chichon and Mt. Pinatubo. This composite shows false-color images of the SO2 clouds on the second day after each eruption. Following the devastating eruption of Mt. Pinatubo in the Philippines in June 1991 there has been a resurgence of interest in the global effects of volcanism.