A monthly and latitudinally varying volcanic forcing dataset in simulations of 20th century climate

Details A monthly and latitudinally varying volcanic forcing dataset in simulations of 20th century climate A monthly and latitudinally varying volcanic forcing dataset in simulations of 20th century climate

Jun 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30l..59a&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 12, pp. 59-1, CiteID 1657, DOI 10.1029/2003GL016875

Physics

Geophysics

71

Atmospheric Composition And Structure: Volcanic Effects (8409), Global Change: Climate Dynamics (3309), History Of Geophysics: Atmospheric Sciences, Meteorology And Atmospheric Dynamics: Climatology (1620), Meteorology And Atmospheric Dynamics: Numerical Modeling And Data Assimilation

Scientific paper

A new monthly volcanic forcing dataset is included in a coupled GCM for a more physically consistent treatment of the stratospheric sulfate aerosol history from explosive volcanism. The volcanic forcing is different from previous versions in that there is an individual evolution of the aerosol for each event. Thus the seasonal and latitudinal dependence of the volcanic aerosol can affect global climate in a more realistic way prior to the satellite period, compared to earlier volcanic forcing datasets. Negative radiative forcing from volcanic activity is greatest in the early 20th century prior to 1915 and in the late 20th century after 1960. The combination of volcanic and solar forcing contributes to an early-20th century warming, followed by relative cooling in late 20th century. Consequently, the addition of natural forcing factors to the anthropogenic GHG forcing in late 20th century is required to simulate the observed late 20th century warming.

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