气候变化领域集成服务门户(CCPortal): Dynamical linear modeling estimates of long-term ozone trends from homogenized Dobson Umkehr protiles at Arosa/Davos, Switzerland

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DOI	10.5194/acp-22-14283-2022
	Dynamical linear modeling estimates of long-term ozone trends from homogenized Dobson Umkehr protiles at Arosa/Davos, Switzerland
	Barras, Eliane Maillard; Haefele, Alexander; Stubi, Rene; Jouberton, Achille; Schill, Herbert; Petropavlovskikh, Irina; Miyagawa, Koji; Stanek, Martin; Froidevaux, Lucien
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	14283
结束页码	14302
卷号	22 期号:21 页码:20
英文摘要	Six collocated spectrophotometers based in Arosa/Davos, Switzerland, have been measuring ozone profiles continuously since 1956 for the oldest Dobson instrument and since 2005 for the Brewer instruments. The datasets of these two ground-based triads (three Dobsons and three Brewers) allow for continuous intercomparisons and derivation of long-term trend estimates. Mainly, two periods in the post-2000 Dobson D051 dataset show anomalies when compared to the Brewer triad time series: in 2011-2013, an offset has been attributed to technical interventions during the renewal of the spectrophotometer acquisition system, and in 2018, an offset with respect to the Brewer triad has been detected following an instrumental change on the spectrophotometer wedge. In this study, the worldwide longest Umkehr dataset (1956-2020) is carefully homogenized using collocated and simultaneous Dobson and Brewer measurements. A recently published report (Garane et al., 2022) described results of an independent homogenization of the same dataset performed by comparison to the Modern-Era Retrospective analysis for Research and Applications version 2 (MERRA-2) Global Modeling Initiative (M2GMI) model simulations. In this paper, the two versions of homogenized Dobson D051 records are intercompared to analyze residual differences found during the correction periods. The Aura Microwave Limb Sounder (MLS) station overpass record (2005-2020) is used as an independent reference for the comparisons. The two homogenized data records show common correction periods, except for the 2017-2018 period, and the corrections are similar in magnitude. In addition, the post-2000 ozone profile trends are estimated from the two homogenized Dobson D051 time series by dynamical linear modeling (DLM), and results are compared with the DLM trends derived from the collocated Brewer Umkehr time series. By first investigating the long-term Dobson ozone record for trends using the well-established multilinear regression (MLR) method, we find that the trends obtained by both MLR and DLM techniques are similar within their uncertainty ranges in the upper and middle stratosphere but that the trend's significances differ in the lower stratosphere. Post-2000 DLM trend estimates show a positive trend of 0.2 to 0.5 % yr(-1) above 35 km, significant for Dobson D051 but lower and therefore nonsignificantly different from zero at the 95 % level of confidence for Brewer B040. As shown for the Dobson D051 data record, the trend only seems to become significantly positive in 2004. Moreover, a persistent negative trend is estimated in the middle stratosphere between 25 and 30 km. In the lower stratosphere, the trend is negative at 20 km, with different levels of significance depending on the period and on the dataset.
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:000879749000001
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/273101
作者单位	Federal Office of Meteorology & Climatology (MeteoSwiss); University of Colorado System; University of Colorado Boulder; National Oceanic Atmospheric Admin (NOAA) - USA; Czech Hydrometeorological Institute; California Institute of Technology; National Aeronautics & Space Administration (NASA); NASA Jet Propulsion Laboratory (JPL); Swiss Federal Institutes of Technology Domain; Swiss Federal Institute for Forest, Snow & Landscape Research
推荐引用方式 GB/T 7714	Barras, Eliane Maillard,Haefele, Alexander,Stubi, Rene,et al. Dynamical linear modeling estimates of long-term ozone trends from homogenized Dobson Umkehr protiles at Arosa/Davos, Switzerland[J],2022,22(21):20.
APA	Barras, Eliane Maillard.,Haefele, Alexander.,Stubi, Rene.,Jouberton, Achille.,Schill, Herbert.,...&Froidevaux, Lucien.(2022).Dynamical linear modeling estimates of long-term ozone trends from homogenized Dobson Umkehr protiles at Arosa/Davos, Switzerland.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(21),20.
MLA	Barras, Eliane Maillard,et al."Dynamical linear modeling estimates of long-term ozone trends from homogenized Dobson Umkehr protiles at Arosa/Davos, Switzerland".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.21(2022):20.