M. Blumthaler et W. Ambach, CHANGES IN SOLAR-RADIATION FLUXES AFTER THE PINATUBO ERUPTION, Tellus. Series B, Chemical and physical meteorology, 46(1), 1994, pp. 76-78
Measurements at a high mountain station on cloudless days showed signi
ficant changes in solar radiation from summer 1991 to summer 1992 as a
consequence of the Pinatubo eruption. An increase in diffuse sky tota
l radiation and a concomitant decrease in global total radiation (sun
and sky) of 4% were observed. The optical aerosol depth at 427 nm, obt
ained from sun photometric measurements, showed a significant increase
.