Dietmüller, Simone and Ponater, Michael and Dameris, Martin and Sausen, Robert (2015) Stratospheric ozone causes a negative feedback in CO2-driven climate change simulations. Common Future under Climate Change (CFCC) 2015, 7. - 10. Juli 2015, Paris, Frankreich.
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Official URL: http://cfcc.event.y-congress.com/ScientificProcess/Schedule/index.html?setLng=en#
Abstract
Ozone has been considered mainly as a contributor to climate change in terms of radiative forcing. However, it is also providing a radiative feedback when climate change is induced by, for example, a radiative forcing from CO2 increase. Interactively coupled chemistry-climate models can be used to identify and quantify this feedback. In a set of simulations forced by CO2 increase of different strength we find a negative ozone radiative feedback, which reduces the climate sensitivity compared to a model system where the ozone distribution is prescribed. Stratospheric ozone is more important than tropospheric ozone for this chemical feedback. The feedback mechanisms mainly works through intensification of the Brewer-Dobson circulation as sea surface temperature increases. The stratospheric water vapour feedback is modified by interaction with the ozone feedback, becoming less positive than in simulations with fixed ozone. Hence, a negative ozone feedback and a reduced water vapour feedback overlap constructively in CO2-driven simulations with interactive ozone, giving a global sea surface temperature response that is 4 to 10% smaller than in a corresponding simulation without interactive chemistry.
Item URL in elib: | https://elib.dlr.de/97123/ | |||||||||||||||
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Document Type: | Conference or Workshop Item (Poster) | |||||||||||||||
Title: | Stratospheric ozone causes a negative feedback in CO2-driven climate change simulations | |||||||||||||||
Authors: |
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Date: | 2015 | |||||||||||||||
Refereed publication: | No | |||||||||||||||
Open Access: | Yes | |||||||||||||||
Gold Open Access: | No | |||||||||||||||
In SCOPUS: | No | |||||||||||||||
In ISI Web of Science: | No | |||||||||||||||
Status: | Published | |||||||||||||||
Keywords: | ozone radiative feedback | |||||||||||||||
Event Title: | Common Future under Climate Change (CFCC) 2015 | |||||||||||||||
Event Location: | Paris, Frankreich | |||||||||||||||
Event Type: | international Conference | |||||||||||||||
Event Dates: | 7. - 10. Juli 2015 | |||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | |||||||||||||||
HGF - Program: | Space | |||||||||||||||
HGF - Program Themes: | Earth Observation | |||||||||||||||
DLR - Research area: | Raumfahrt | |||||||||||||||
DLR - Program: | R EO - Erdbeobachtung | |||||||||||||||
DLR - Research theme (Project): | R - Vorhaben Atmosphären- und Klimaforschung | |||||||||||||||
Location: | Oberpfaffenhofen | |||||||||||||||
Institutes and Institutions: | Institute of Atmospheric Physics Institute of Atmospheric Physics > Earth System Modelling | |||||||||||||||
Deposited By: | Ponater, Dr.rer.nat. Michael | |||||||||||||||
Deposited On: | 09 Jul 2015 16:54 | |||||||||||||||
Last Modified: | 31 Jul 2019 19:53 |
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