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Quantifying Arctic lower stratospheric ozone sources in winter and spring
Chen Pan1,2,3,4, Bin Zhu5,6,7,8, Jinhui Gao1,2,3,4
1Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science & Technology, Nanjing, China.
Scientific Reports
|June 14, 2018
Summary
Arctic lower stratospheric ozone (ARCLS_O3) primarily originates from the mid-latitudes, contributing about half. Tropical regions also supply ozone, with their contributions varying significantly and controlling temperature-induced anomalies.
Area of Science:
- Atmospheric Chemistry
- Stratospheric Science
- Ozone Layer Dynamics
Background:
- Unusually low Arctic ozone events in 2005 and 2011 are well-documented.
- Quantitative identification of Arctic ozone sources remains a research gap.
Purpose of the Study:
- To quantitatively assess the contributions of different latitudinal regions to Arctic lower stratospheric ozone (ARCLS_O3).
- To analyze the variability of these contributions during winter and spring from 2005-2011.
Main Methods:
- Utilized tagged ozone tracers in a numerical simulation.
- Quantified ozone contributions to ARCLS_O3 at diverse latitudes.
Main Results:
- Northern mid-latitudinal stratosphere consistently provides approximately half of ARCLS_O3.
- Tropical stratosphere is a significant source, with contributions varying notably between cold and warm years.
- Tropical ozone components show larger variations (51.8–77.0 DU) compared to mid-latitudinal components (17.6–18.1 DU) during stratospheric warming events.
Conclusions:
- Northern mid-latitudes are the largest, steady source of ARCLS_O3.
- Tropical ozone contributions are more variable and are key drivers of temperature-induced ARCLS_O3 anomalies in winter and spring.
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