Show simple item record

dc.contributor.authorMickley, Loretta J.
dc.contributor.authorJacob, Daniel James
dc.contributor.authorRind, David Michael
dc.date.accessioned2015-03-11T18:32:39Z
dc.date.issued2001
dc.identifier.citationMickley, Loretta J., Daniel J. Jacob, and David Rind. 2001. “Uncertainty in Preindustrial Abundance of Tropospheric Ozone: Implications for Radiative Forcing Calculations.” Journal of Geophysical Research 106, issue D4: 3389-3399.en_US
dc.identifier.issn0148-0227en_US
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:14117812
dc.description.abstractRecent model calculations of the global mean radiative forcing from tropospheric ozone since preindustrial times fall in a relatively narrow range, from 0.3 to 0.5 W m−2. These calculations use preindustrial ozone fields that overestimate observations available from the turn of the nineteenth century. Although there may be calibration problems with the observations, uncertainties in model estimates of preindustrial natural emissions must also be considered. We show that a global three-dimensional model of tropospheric chemistry with reduced NOx emissions from lightning (1–2 Tg N yr−1) and soils (2 Tg N yr−1) and increased emissions of biogenic hydrocarbons can better reproduce the nineteenth century observations. The resulting global mean radiative forcing from tropospheric ozone since preindustrial times is 0.72–0.80 W m−2, amounting to about half of the estimated CO2 forcing. Reduction in the preindustrial lightning source accounts for two thirds of the increase in the ozone forcing. Because there is near-total titration of OH by isoprene in the continental boundary layer of the preindustrial atmosphere, isoprene and other biogenic hydrocarbons represent significant ozone sinks. The weak or absent spring maximum in the nineteenth century observations of ozone is difficult to explain within our understanding of the natural ozone budget. Our results indicate that the uncertainty in computing radiative forcing from tropospheric ozone since preindustrial times is larger than is usually acknowledged.en_US
dc.description.sponsorshipEngineering and Applied Sciencesen_US
dc.language.isoen_USen_US
dc.publisherWiley-Blackwellen_US
dc.relation.isversionofdoi:10.1029/2000JD900594en_US
dc.relation.hasversionhttp://onlinelibrary.wiley.com/doi/10.1029/2000JD900594/abstracten_US
dash.licenseLAA
dc.titleUncertainty in preindustrial abundance of tropospheric ozone: Implications for radiative forcing calculationsen_US
dc.typeJournal Articleen_US
dc.description.versionVersion of Recorden_US
dc.relation.journalJournal of Geophysical Researchen_US
dash.depositing.authorJacob, Daniel James
dc.date.available2015-03-11T18:32:39Z
dc.identifier.doi10.1029/2000JD900594*
dash.contributor.affiliatedRind, David
dash.contributor.affiliatedMickley, Loretta
dash.contributor.affiliatedJacob, Daniel


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record