Quantifying contributions of ozone changes to global and arctic warming during the second half of the twentieth century
Ozone is the third most important greenhouse gas in driving global warming, mainly due to increased tropospheric ozone. About 50% of the growth of global tropospheric ozone since preindustrial time occurred during 1955–2005, with continued growth since then. Furthermore, this study quantifies the re...
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Online Access: | http://www.osti.gov/servlets/purl/1968858 https://www.osti.gov/biblio/1968858 https://doi.org/10.1007/s00382-022-06621-6 |
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ftosti:oai:osti.gov:1968858 2023-07-30T04:00:35+02:00 Quantifying contributions of ozone changes to global and arctic warming during the second half of the twentieth century Hu, Yuantao Wu, Qigang Hu, Aixue Schroeder, Steven 2023-04-13 application/pdf http://www.osti.gov/servlets/purl/1968858 https://www.osti.gov/biblio/1968858 https://doi.org/10.1007/s00382-022-06621-6 unknown http://www.osti.gov/servlets/purl/1968858 https://www.osti.gov/biblio/1968858 https://doi.org/10.1007/s00382-022-06621-6 doi:10.1007/s00382-022-06621-6 2023 ftosti https://doi.org/10.1007/s00382-022-06621-6 2023-07-11T10:26:24Z Ozone is the third most important greenhouse gas in driving global warming, mainly due to increased tropospheric ozone. About 50% of the growth of global tropospheric ozone since preindustrial time occurred during 1955–2005, with continued growth since then. Furthermore, this study quantifies the relative contributions of ozone changes during 1955–2005 to total observed global and Arctic climate changes by comparing CESM1 historical simulations with all anthropogenic and natural radiative forcings including realistic ozone changes, and with the same forcings except with constant ozone or well-mixed greenhouse gases (WMGHG). Results indicate that ozone changes during 1955–2005 have strongly enhanced the downwelling longwave flux and increased net shortwave flux at the surface, and thus significantly contributed about 0.15 °C of global mean surface warming, roughly 21%, 26% and 16% of the observed, all-forcing and WMGHG-driven trends, respectively. In the Arctic in the same period, corresponding ozone-driven warming was about 0.63 °C, roughly 48%, 40% and 25% of the same three trends. During 1979–2005, these ozone changes have markedly added about 0.25 × 10 6 km 2 to the decrease in the Arctic sea ice extent (SIE), or roughly 25%, 48%, and 40% of the same three trends. Considering that the ozone-driven radiative forcing of about 0.22 (0.06) W·m –2 in 1955–2005 (1979–2005) was about 12% (6%) of the corresponding WMGHG forcing, ozone changes had contributed disproportionately to global and Arctic warming and Arctic sea ice decline during the second half of the twentieth century. Tropospheric ozone has shown relatively steady growth since 2006 and might have significantly contributed recent observed warming over the global and the Arctic. Other/Unknown Material Arctic Global warming Sea ice SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Arctic Climate Dynamics 61 3-4 1209 1228 |
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Open Polar |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
description |
Ozone is the third most important greenhouse gas in driving global warming, mainly due to increased tropospheric ozone. About 50% of the growth of global tropospheric ozone since preindustrial time occurred during 1955–2005, with continued growth since then. Furthermore, this study quantifies the relative contributions of ozone changes during 1955–2005 to total observed global and Arctic climate changes by comparing CESM1 historical simulations with all anthropogenic and natural radiative forcings including realistic ozone changes, and with the same forcings except with constant ozone or well-mixed greenhouse gases (WMGHG). Results indicate that ozone changes during 1955–2005 have strongly enhanced the downwelling longwave flux and increased net shortwave flux at the surface, and thus significantly contributed about 0.15 °C of global mean surface warming, roughly 21%, 26% and 16% of the observed, all-forcing and WMGHG-driven trends, respectively. In the Arctic in the same period, corresponding ozone-driven warming was about 0.63 °C, roughly 48%, 40% and 25% of the same three trends. During 1979–2005, these ozone changes have markedly added about 0.25 × 10 6 km 2 to the decrease in the Arctic sea ice extent (SIE), or roughly 25%, 48%, and 40% of the same three trends. Considering that the ozone-driven radiative forcing of about 0.22 (0.06) W·m –2 in 1955–2005 (1979–2005) was about 12% (6%) of the corresponding WMGHG forcing, ozone changes had contributed disproportionately to global and Arctic warming and Arctic sea ice decline during the second half of the twentieth century. Tropospheric ozone has shown relatively steady growth since 2006 and might have significantly contributed recent observed warming over the global and the Arctic. |
author |
Hu, Yuantao Wu, Qigang Hu, Aixue Schroeder, Steven |
spellingShingle |
Hu, Yuantao Wu, Qigang Hu, Aixue Schroeder, Steven Quantifying contributions of ozone changes to global and arctic warming during the second half of the twentieth century |
author_facet |
Hu, Yuantao Wu, Qigang Hu, Aixue Schroeder, Steven |
author_sort |
Hu, Yuantao |
title |
Quantifying contributions of ozone changes to global and arctic warming during the second half of the twentieth century |
title_short |
Quantifying contributions of ozone changes to global and arctic warming during the second half of the twentieth century |
title_full |
Quantifying contributions of ozone changes to global and arctic warming during the second half of the twentieth century |
title_fullStr |
Quantifying contributions of ozone changes to global and arctic warming during the second half of the twentieth century |
title_full_unstemmed |
Quantifying contributions of ozone changes to global and arctic warming during the second half of the twentieth century |
title_sort |
quantifying contributions of ozone changes to global and arctic warming during the second half of the twentieth century |
publishDate |
2023 |
url |
http://www.osti.gov/servlets/purl/1968858 https://www.osti.gov/biblio/1968858 https://doi.org/10.1007/s00382-022-06621-6 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Global warming Sea ice |
genre_facet |
Arctic Global warming Sea ice |
op_relation |
http://www.osti.gov/servlets/purl/1968858 https://www.osti.gov/biblio/1968858 https://doi.org/10.1007/s00382-022-06621-6 doi:10.1007/s00382-022-06621-6 |
op_doi |
https://doi.org/10.1007/s00382-022-06621-6 |
container_title |
Climate Dynamics |
container_volume |
61 |
container_issue |
3-4 |
container_start_page |
1209 |
op_container_end_page |
1228 |
_version_ |
1772811088010674176 |