气候变化领域集成服务门户(CCPortal): Small-scale variability of stratospheric ozone during the sudden stratospheric warming 2018/2019 observed at Ny-Ålesund; Svalbard

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DOI	10.5194/acp-20-10791-2020
	Small-scale variability of stratospheric ozone during the sudden stratospheric warming 2018/2019 observed at Ny-Ålesund; Svalbard
	Schranz F.; Hagen J.; Stober G.; Hocke K.; Murk A.; Kämpfer N.
发表日期	2020
ISSN	16807316
起始页码	10791
结束页码	10806
卷号	20 期号:18
英文摘要	Middle atmospheric ozone, water vapour and zonal and meridional wind profiles have been measured with the two ground-based microwave radiometers GROMOS-C and MIAWARA-C. The instruments have been located at the Arctic research base AWIPEV at Ny-Ålesund, Svalbard (79N, 12E), since September 2015. GROMOS-C measures ozone spectra in the four cardinal directions with an elevation angle of 22. This means that the probed air masses at an altitude of 3 hPa (37 km) have a horizontal distance of 92 km to Ny-Ålesund. We retrieve four separate ozone profiles along the lines of sight and calculate daily mean horizontal ozone gradients which allow us to investigate the small-scale spatial variability of ozone above Ny-Ålesund. We present the evolution of the ozone gradients at Ny-Ålesund during winter 2018/2019, when a major sudden stratospheric warming (SSW) took place with the central date at 2 January, and link it to the planetary wave activity. We further analyse the SSW and discuss our ozone and water vapour measurements in a global context. At 3 hPa we find a distinct seasonal variation of the ozone gradients. The strong polar vortex during October and March results in a decreasing ozone volume mixing ratio towards the pole. In November the amplitudes of the planetary waves grow until they break in the end of December and an SSW takes place. From November until February ozone increases towards higher latitudes and the magnitude of the ozone gradients is smaller than in October and March. We attribute this to the planetary wave activity of wave numbers 1 and 2 which enabled meridional transport. The MERRA-2 reanalysis and the SD-WACCM model are able to capture the small-scale ozone variability and its seasonal changes. © 2020 Author(s).
语种	英语
scopus关键词	air mass; ozone; planetary wave; seasonal variation; spatial variation; stratosphere; sudden stratospheric warming; water vapor; wind profile; Arctic
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/143926
作者单位	Institute of Applied Physics, University of Bern, Bern, Switzerland; Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland
推荐引用方式 GB/T 7714	Schranz F.,Hagen J.,Stober G.,et al. Small-scale variability of stratospheric ozone during the sudden stratospheric warming 2018/2019 observed at Ny-Ålesund; Svalbard[J],2020,20(18).
APA	Schranz F.,Hagen J.,Stober G.,Hocke K.,Murk A.,&Kämpfer N..(2020).Small-scale variability of stratospheric ozone during the sudden stratospheric warming 2018/2019 observed at Ny-Ålesund; Svalbard.Atmospheric Chemistry and Physics,20(18).
MLA	Schranz F.,et al."Small-scale variability of stratospheric ozone during the sudden stratospheric warming 2018/2019 observed at Ny-Ålesund; Svalbard".Atmospheric Chemistry and Physics 20.18(2020).