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apps Other research product2020 English Funded by:EC | STRATOCLIM, UKRI | Reconciling Volcanic Forc..., UKRI | The North Atlantic Climat... +2 projectsEC| STRATOCLIM ,UKRI| Reconciling Volcanic Forcing and Climate Records throughout the Last Millennium (Vol-Clim) ,UKRI| The North Atlantic Climate System Integrated Study ,SNSF| SPARC International Project office ,NSF| Decadal Prediction Following Volcanic EruptionsClyne, Margot; Lamarque, Jean-Francois; Mills, Michael J.; Khodri, Myriam; Ball, William; Bekki, Slimane; Dhomse, Sandip S.; Lebas, Nicolas; Mann, Graham; Marshall, Lauren; Niemeier, Ulrike; Poulain, Virginie; Robock, Alan; Rozanov, Eugene; Schmidt, Anja; Stenke, Andrea; Sukhodolov, Timofei; Timmreck, Claudia; Toohey, Matthew; Tummon, Fiona; Zanchettin, Davide; Zhu, Yunqian; Toon, Owen B.;As part of the Model Intercomparison Project on the climatic response to Volcanic forcing (VolMIP), several climate modeling centers performed a coordinated pre-study experiment with interactive stratospheric aerosol models simulating the volcanic aerosol cloud from an eruption resembling the 1815 Mt. Tambora eruption (VolMIP-Tambora ISA ensemble). The pre-study provided the ancillary ability to assess intermodel diversity in the radiative forcing for a large stratospheric-injecting equatorial eruption when the volcanic aerosol cloud is simulated interactively. An initial analysis of the VolMIP-Tambora ISA ensemble showed large disparities between models in the stratospheric global mean aerosol optical depth (AOD). In this study, we now show that stratospheric global mean AOD differences among the participating models are primarily due to differences in aerosol size, which we track here by effective radius. We identify specific physical and chemical processes that are missing in some models and/or parameterized differently between models, which are together causing the differences in effective radius. In particular, our analysis indicates that interactively tracking hydroxyl radical (OH) chemistry following a large volcanic injection of sulfur dioxide (SO2) is an important factor in allowing for the timescale for sulfate formation to be properly simulated. In addition, depending on the timescale of sulfate formation, there can be a large difference in effective radius and subsequently AOD that results from whether the SO2 is injected in a single model grid cell near the location of the volcanic eruption, or whether it is injected as a longitudinally averaged band around the Earth.
Atmospheric Chemistr... arrow_drop_down Copernicus Publications; Atmospheric Chemistry and Physics (ACP)Other ORP type . 2021Data sources: Copernicus PublicationsAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=copernicuspu::ede312d6b01b14855c9ef29a5f018c98&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert Atmospheric Chemistr... arrow_drop_down Copernicus Publications; Atmospheric Chemistry and Physics (ACP)Other ORP type . 2021Data sources: Copernicus PublicationsAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=copernicuspu::ede312d6b01b14855c9ef29a5f018c98&type=result"></script>'); --> </script>
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apps Other research product2020 English Funded by:EC | STRATOCLIM, UKRI | Reconciling Volcanic Forc..., UKRI | The North Atlantic Climat... +2 projectsEC| STRATOCLIM ,UKRI| Reconciling Volcanic Forcing and Climate Records throughout the Last Millennium (Vol-Clim) ,UKRI| The North Atlantic Climate System Integrated Study ,SNSF| SPARC International Project office ,NSF| Decadal Prediction Following Volcanic EruptionsClyne, Margot; Lamarque, Jean-Francois; Mills, Michael J.; Khodri, Myriam; Ball, William; Bekki, Slimane; Dhomse, Sandip S.; Lebas, Nicolas; Mann, Graham; Marshall, Lauren; Niemeier, Ulrike; Poulain, Virginie; Robock, Alan; Rozanov, Eugene; Schmidt, Anja; Stenke, Andrea; Sukhodolov, Timofei; Timmreck, Claudia; Toohey, Matthew; Tummon, Fiona; Zanchettin, Davide; Zhu, Yunqian; Toon, Owen B.;As part of the Model Intercomparison Project on the climatic response to Volcanic forcing (VolMIP), several climate modeling centers performed a coordinated pre-study experiment with interactive stratospheric aerosol models simulating the volcanic aerosol cloud from an eruption resembling the 1815 Mt. Tambora eruption (VolMIP-Tambora ISA ensemble). The pre-study provided the ancillary ability to assess intermodel diversity in the radiative forcing for a large stratospheric-injecting equatorial eruption when the volcanic aerosol cloud is simulated interactively. An initial analysis of the VolMIP-Tambora ISA ensemble showed large disparities between models in the stratospheric global mean aerosol optical depth (AOD). In this study, we now show that stratospheric global mean AOD differences among the participating models are primarily due to differences in aerosol size, which we track here by effective radius. We identify specific physical and chemical processes that are missing in some models and/or parameterized differently between models, which are together causing the differences in effective radius. In particular, our analysis indicates that interactively tracking hydroxyl radical (OH) chemistry following a large volcanic injection of sulfur dioxide (SO2) is an important factor in allowing for the timescale for sulfate formation to be properly simulated. In addition, depending on the timescale of sulfate formation, there can be a large difference in effective radius and subsequently AOD that results from whether the SO2 is injected in a single model grid cell near the location of the volcanic eruption, or whether it is injected as a longitudinally averaged band around the Earth.
Atmospheric Chemistr... arrow_drop_down Copernicus Publications; Atmospheric Chemistry and Physics (ACP)Other ORP type . 2021Data sources: Copernicus PublicationsAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=copernicuspu::ede312d6b01b14855c9ef29a5f018c98&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert Atmospheric Chemistr... arrow_drop_down Copernicus Publications; Atmospheric Chemistry and Physics (ACP)Other ORP type . 2021Data sources: Copernicus PublicationsAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=copernicuspu::ede312d6b01b14855c9ef29a5f018c98&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu