By Juan Carlos Antuña (auth.), Giorgio Fiocco, Daniele Fuà , Guido Visconti (eds.)
The eruption of Mt. Pinatubo in June 1991 used to be without problems well-known as one of many significant eruptions of the century. In a feeling, it was once the worldwide test that the atmospheric clinical neighborhood was once watching for for you to determine theories built on ozone depletion and greenhouse warming.
This quantity summarizes what has been measured and theorized concerning the results of the eruption. it really is divided into 4 sections which conceal the characterization of the aerosol cloud and the measured or simulated results on temperature, ozone and weather. The eruption used to be the resource of a giant quantity of valuable facts. the translation of those information is helping to explain the habit of the weather method in addition to ozone photochemistry and ozone meteorology.
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Extra resources for The Mount Pinatubo Eruption: Effects on the Atmosphere and Climate
At the relevant altitudes and during these periods both heterogeneous reactions (1) and (2) are then expected to contribute to ozone depletion. 2-D model simulations by Rodriguez et al. (1994), employing aerosol loads of 24 Ilm2/cm3 at 64 hPa and 38°N, predict the March 1992 ozone depletion to range between 4% (only reaction (I) considered) and 6% (both reactions (1) and (2) considered). , 1994). , 1993). However, reported 0 3 losses of 20% are quite larger than those predicted by heterogeneous chemistry alone.
Lm to the aerosol volume is displayed as a function of the effective radius (the effective radius is the area weighted r~dius). The largest uncertainty in the determination of the aerosol volume is the lack of knowledge of the refractive index of H 2 S04 - H 2 0 solutions. , 1994). In the current study, values of the imaginary component of the refractive index measured by Palmer and Williams (1975) have been normalised to the more accurate measurements of Remsberg et a1. (1975). The estimated error in the conversion of extinction to aerosol volume of ",20 %.
A gap in the data does not allow a detailed comparison with Rome. , 1994). The largest values of column mass are reported at Thule in April 1992, following the breakup of the vortex. , 1994). g. , 1994). Figure 6 b shows that large differences in the position of the centre of mass were present at the three stations. In the first period the main part of the cloud was concentrated around 20 km, as it appears from the Rome data. The Mt. Hudson cloud is responsible for the low values of the centre of mass altitude at the South Pole; most of the high altitude cloud from Mt.