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Total aerosol effect: radiative forcing or radiative flux perturbation?
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2010 (English)In: Atmospheric Chemistry And Physics, ISSN 1680-7316, E-ISSN 1680-7324, Vol. 10, no 7, 3235-3246 p.Article in journal (Refereed) Published
Abstract [en]

Uncertainties in aerosol radiative forcings, especially those associated with clouds, contribute to a large extent to uncertainties in the total anthropogenic forcing. The interaction of aerosols with clouds and radiation introduces feedbacks which can affect the rate of precipitation formation. In former assessments of aerosol radiative forcings, these effects have not been quantified. Also, with global aerosol-climate models simulating interactively aerosols and cloud microphysical properties, a quantification of the aerosol forcings in the traditional way is difficult to define properly. Here we argue that fast feedbacks should be included because they act quickly compared with the time scale of global warming. We show that for different forcing agents (aerosols and greenhouse gases) the radiative forcings as traditionally defined agree rather well with estimates from a method, here referred to as radiative flux perturbations (RFP), that takes these fast feedbacks and interactions into account. Based on our results, we recommend RFP as a valid option to compare different forcing agents, and to compare the effects of particular forcing agents in different models.

Place, publisher, year, edition, pages
2010. Vol. 10, no 7, 3235-3246 p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:su:diva-50284DOI: 10.5194/acp-10-3235-2010ISI: 000276663600006OAI: oai:DiVA.org:su-50284DiVA: diva2:381562
Note
authorCount :9Available from: 2010-12-28 Created: 2010-12-22 Last updated: 2017-12-11Bibliographically approved

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Ekman, Annica M. L.
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