气候变化领域集成服务门户(CCPortal): OClO as observed by TROPOMI: a comparison with meteorological parameters and polar stratospheric cloud observations

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DOI	10.5194/acp-22-245-2022
	OClO as observed by TROPOMI: a comparison with meteorological parameters and polar stratospheric cloud observations
	Pukite, Janis; Borger, Christian; Doerner, Steffen; Gu, Myojeong; Wagner, Thomas
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	245
结束页码	272
卷号	22 期号:1 页码:28
英文摘要	Chlorine dioxide (OClO) is a by-product of the ozone-depleting halogen chemistry in the stratosphere. Although it is rapidly photolysed at low solar zenith angles (SZAs), it plays an important role as an indicator of the chlorine activation in polar regions during polar winter and spring at twilight conditions because of the nearly linear dependence of its formation on chlorine oxide (ClO). Here, we compare slant column densities (SCDs) of chlorine dioxide (OClO) retrieved by means of differential optical absorption spectroscopy (DOAS) from spectra measured by the TROPOspheric Monitoring Instrument (TROPOMI) with meteorological data for both Antarctic and Arctic regions for the first three winters in each of the hemispheres (November 2017-October 2020). TROPOMI, a UV-Vis-NIR-SWIR instrument on board of the Sentinel-5P satellite, monitors the Earth's atmosphere in a near-polar orbit at an unprecedented spatial resolution and signal-to-noise ratio and provides daily global coverage at the Equator and thus even more frequent observations at polar regions. The observed OClO SCDs are generally well correlated with the meteorological conditions in the polar winter stratosphere; for example, the chlorine activation signal appears as a sharp gradient in the time series of the OClO SCDs once the temperature drops to values well below the nitric acid trihydrate (NAT) existence temperature (TNAT). Also a relation of enhanced OClO values at lee sides of mountains can be observed at the beginning of the winters, indicating a possible effect of lee waves on chlorine activation. The dataset is also compared with CALIPSO Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) polar stratospheric cloud (PSC) observations. In general, OClO SCDs coincide well with CALIOP measurements for which PSCs are detected. Very high OClO levels are observed for the northern hemispheric winter 2019/20, with an extraordinarily long period with a stable polar vortex being even close to the values found for southern hemispheric winters. An extraordinary winter in the Southern Hemisphere was also observed in 2019, with a minor sudden stratospheric warming at the beginning of September. In this winter, similar OClO values were measured in comparison to the previous (usual) winter till that event but with a OClO deactivation that was 1-2 weeks earlier.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000740532800001
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/273184
作者单位	Max Planck Society
推荐引用方式 GB/T 7714	Pukite, Janis,Borger, Christian,Doerner, Steffen,et al. OClO as observed by TROPOMI: a comparison with meteorological parameters and polar stratospheric cloud observations[J],2022,22(1):28.
APA	Pukite, Janis,Borger, Christian,Doerner, Steffen,Gu, Myojeong,&Wagner, Thomas.(2022).OClO as observed by TROPOMI: a comparison with meteorological parameters and polar stratospheric cloud observations.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(1),28.
MLA	Pukite, Janis,et al."OClO as observed by TROPOMI: a comparison with meteorological parameters and polar stratospheric cloud observations".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.1(2022):28.