globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2155
论文题名:
Reconciliation of halogen-induced ozone loss with the total-column ozone record
作者: Shepherd T.G.; Plummer D.A.; Scinocca J.F.; Hegglin M.I.; Fioletov V.E.; Reader M.C.; Remsberg E.; Von Clarmann T.; Wang H.J.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2014
卷: 7, 期:6
起始页码: 443
结束页码: 449
语种: 英语
Scopus关键词: aerosol ; atmospheric chemistry ; atmospheric pollution ; halogen ; human activity ; ozone ; reconstruction ; stratosphere ; troposphere ; Central Luzon ; Chiapas ; El Chichon ; Luzon ; Mexico [North America] ; Mount Pinatubo ; Philippines ; Zambales ; Pinatubo
英文摘要: The observed depletion of the ozone layer from the 1980s onwards is attributed to halogen source gases emitted by human activities. However, the precision of this attribution is complicated by year-to-year variations in meteorology, that is, dynamical variability, and by changes in tropospheric ozone concentrations. As such, key aspects of the total-column ozone record, which combines changes in both tropospheric and stratospheric ozone, remain unexplained, such as the apparent absence of a decline in total-column ozone levels before 1980, and of any long-term decline in total-column ozone levels in the tropics. Here we use a chemistry-climate model to estimate changes in halogen-induced ozone loss between 1960 and 2010; the model is constrained by observed meteorology to remove the effects of dynamical variability, and driven by emissions of tropospheric ozone precursors to separate out changes in tropospheric ozone. We show that halogen-induced ozone loss closely followed stratospheric halogen loading over the studied period. Pronounced enhancements in ozone loss were apparent in both hemispheres following the volcanic eruptions of El Chichon and, in particular, Mount Pinatubo, which significantly enhanced stratospheric aerosol loads. We further show that approximately 40% of the long-term non-volcanic ozone loss occurred before 1980, and that long-term ozone loss also occurred in the tropical stratosphere. Finally, we show that halogen-induced ozone loss has declined by over 10% since stratospheric halogen loading peaked in the late 1990s, indicating that the recovery of the ozone layer is well underway. © 2014 Macmillan Publishers Limited.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106529
Appears in Collections:气候减缓与适应
科学计划与规划

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作者单位: Department of Meteorology, University of Reading, Reading RG6 6BB, United Kingdom; Canadian Centre for Climate Modelling and Analysis, Environment Canada, Victoria, BC V8W 3V6, Canada; Environment Canada, 4905 Dufferin Street, Toronto, ON M3H 5T4, Canada; School of Earth and Ocean Sciences, University of Victoria, PO Box 3055, Victoria, BC V8W 3P6, Canada; National Aeronautics and Space Administration, Langley Research Center, Hampton, VA 23681-2199, United States; Institute for Meteorology and Climate Research, Karlsruhe Institute of Technology, D-76021 Karlsruhe, Germany; School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30332-0340, United States

Recommended Citation:
Shepherd T.G.,Plummer D.A.,Scinocca J.F.,et al. Reconciliation of halogen-induced ozone loss with the total-column ozone record[J]. Nature Geoscience,2014-01-01,7(6)
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