Climate forcing due to tropospheric and stratospheric ozone
作者： J. T. Kiehl , T. L. Schneider , R. W. Portmann , S. Solomon
DOI: 10.1029/1999JD900991
关键词:
摘要: Radiative forcings, preindustrial to present, are presented due changes in both tropospheric and total ozone. Unlike previous studies, we use a combination of present-day satellite data, ozonsondes, chemistry model produce hybrid monthly mean ozone data set from 1870 1990. We calculate the radiative forcing prescribed distribution using three-dimensional climate that employs seasonally evolving fixed dynamical heating stratosphere. find causes seasonal (SEFDH) 0.30 W m -2 over time period 1870-1990. The spatial pattern is correlated strongly with change When allow for observed stratospheric 1990 0.29 , 0.18 shortwave 0.1 longwave processes. Thus reduction since 1970 offsets by only -0.01 . also consider what extent increased direct sulfate aerosols. June-July-August -0.76 while addition reduces this -0.40 2 Finally, carry out sensitivity studies regard uncertainty levels.
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