Halogen emissions from a small volcanic eruption: Modeling the peak concentrations, dispersion, and volcanically induced ozone loss in the stratosphere
Aircraft measurements in the Hekla, Iceland volcanic plume in February 2000 revealed large quantities of hydrogen halides within the stratosphere correlated to volcanic SO2. Investigation of the longer-term stratospheric impact of these emissions, using the 3D chemical transport model, SLIMCAT sugge...
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ftmichigantuniv:oai:digitalcommons.mtu.edu:geo-fp-1040 2023-05-15T16:34:03+02:00 Halogen emissions from a small volcanic eruption: Modeling the peak concentrations, dispersion, and volcanically induced ozone loss in the stratosphere Millard, G. A. Mather, T. A. Pyle, D. M. Rose, William I. Thornton, B. 2006-10-12T07:00:00Z application/pdf https://digitalcommons.mtu.edu/geo-fp/39 https://digitalcommons.mtu.edu/cgi/viewcontent.cgi?article=1040&context=geo-fp unknown Digital Commons @ Michigan Tech https://digitalcommons.mtu.edu/geo-fp/39 https://digitalcommons.mtu.edu/cgi/viewcontent.cgi?article=1040&context=geo-fp Department of Geological and Mining Engineering and Sciences Publications Earth Sciences Engineering Geology Mining Engineering Other Engineering text 2006 ftmichigantuniv 2022-01-23T10:32:02Z Aircraft measurements in the Hekla, Iceland volcanic plume in February 2000 revealed large quantities of hydrogen halides within the stratosphere correlated to volcanic SO2. Investigation of the longer-term stratospheric impact of these emissions, using the 3D chemical transport model, SLIMCAT suggests that volcanic enhancements of H2O and HNO3 increased HNO3·3H2O particle availability within the plume. These particles activated volcanic HCl and HBr, enhancing model plume concentrations of ClOx (20 ppb) and BrOx (50 ppt). Model O3 concentrations decreased to near-zero in places, and plume average O3 remained 30% lower after two weeks. Reductions in the model O3column reduced UV shielding by 15% for 2 days. Plume incorporation into the winter polar vortex after 1 March elevated model vortex Cly and Bry by 0.15 ppb and 7 ppt respectively, and doubled vortex ClOxand BrO. Model results agree quantitatively with the observations made by the DC-8 aircraft. Text Hekla Iceland Michigan Technological University: Digital Commons @ Michigan Tech |
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Michigan Technological University: Digital Commons @ Michigan Tech |
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Earth Sciences Engineering Geology Mining Engineering Other Engineering |
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Earth Sciences Engineering Geology Mining Engineering Other Engineering Millard, G. A. Mather, T. A. Pyle, D. M. Rose, William I. Thornton, B. Halogen emissions from a small volcanic eruption: Modeling the peak concentrations, dispersion, and volcanically induced ozone loss in the stratosphere |
topic_facet |
Earth Sciences Engineering Geology Mining Engineering Other Engineering |
description |
Aircraft measurements in the Hekla, Iceland volcanic plume in February 2000 revealed large quantities of hydrogen halides within the stratosphere correlated to volcanic SO2. Investigation of the longer-term stratospheric impact of these emissions, using the 3D chemical transport model, SLIMCAT suggests that volcanic enhancements of H2O and HNO3 increased HNO3·3H2O particle availability within the plume. These particles activated volcanic HCl and HBr, enhancing model plume concentrations of ClOx (20 ppb) and BrOx (50 ppt). Model O3 concentrations decreased to near-zero in places, and plume average O3 remained 30% lower after two weeks. Reductions in the model O3column reduced UV shielding by 15% for 2 days. Plume incorporation into the winter polar vortex after 1 March elevated model vortex Cly and Bry by 0.15 ppb and 7 ppt respectively, and doubled vortex ClOxand BrO. Model results agree quantitatively with the observations made by the DC-8 aircraft. |
format |
Text |
author |
Millard, G. A. Mather, T. A. Pyle, D. M. Rose, William I. Thornton, B. |
author_facet |
Millard, G. A. Mather, T. A. Pyle, D. M. Rose, William I. Thornton, B. |
author_sort |
Millard, G. A. |
title |
Halogen emissions from a small volcanic eruption: Modeling the peak concentrations, dispersion, and volcanically induced ozone loss in the stratosphere |
title_short |
Halogen emissions from a small volcanic eruption: Modeling the peak concentrations, dispersion, and volcanically induced ozone loss in the stratosphere |
title_full |
Halogen emissions from a small volcanic eruption: Modeling the peak concentrations, dispersion, and volcanically induced ozone loss in the stratosphere |
title_fullStr |
Halogen emissions from a small volcanic eruption: Modeling the peak concentrations, dispersion, and volcanically induced ozone loss in the stratosphere |
title_full_unstemmed |
Halogen emissions from a small volcanic eruption: Modeling the peak concentrations, dispersion, and volcanically induced ozone loss in the stratosphere |
title_sort |
halogen emissions from a small volcanic eruption: modeling the peak concentrations, dispersion, and volcanically induced ozone loss in the stratosphere |
publisher |
Digital Commons @ Michigan Tech |
publishDate |
2006 |
url |
https://digitalcommons.mtu.edu/geo-fp/39 https://digitalcommons.mtu.edu/cgi/viewcontent.cgi?article=1040&context=geo-fp |
genre |
Hekla Iceland |
genre_facet |
Hekla Iceland |
op_source |
Department of Geological and Mining Engineering and Sciences Publications |
op_relation |
https://digitalcommons.mtu.edu/geo-fp/39 https://digitalcommons.mtu.edu/cgi/viewcontent.cgi?article=1040&context=geo-fp |
_version_ |
1766023795701710848 |