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001046686 0247_ $$2doi$$a10.5194/essd-17-4901-2025
001046686 0247_ $$2ISSN$$a1866-3508
001046686 0247_ $$2ISSN$$a1866-3516
001046686 0247_ $$2datacite_doi$$a10.34734/FZJ-2025-03912
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001046686 1001_ $$0P:(DE-HGF)0$$aKanaya, Yugo$$b0$$eCorresponding author
001046686 245__ $$aObservational ozone datasets over the global oceans and polar regions (version 2024)
001046686 260__ $$aKatlenburg-Lindau$$bCopernics Publications$$c2025
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001046686 520__ $$aStudying tropospheric ozone over the remote areas of the planet, such as the open oceans and the polar regions, is crucial to understand the role of ozone as a global climate forcer and regulator of atmospheric oxidative capacity. A focus on the pristine oceanic and polar regions complements the available land-based datasets and provides insights into key photochemical and depositional loss processes that control the concentrations and spatiotemporal variability in ozone as well as the physicochemical mechanisms driving these patterns. However, an assessment of the role of ozone over the oceanic and polar regions has been hampered by a lack of comprehensive observational datasets. Here, we present the first comprehensive collection of ozone data over the oceans and the polar regions. The overall dataset consists of 77 ship cruises/buoy-based observations and 48 aircraft-based campaigns. The dataset, consisting of more than 630 000 independent ozone measurement data points covering the period from 1977 to 2022 and an altitude range from the surface to 5000 m (with a focus on the lowest 2000 m), allows systematic analyses of the spatiotemporal distribution and long-term trends over the 11 defined ocean/polar regions. The datasets from ships, buoys, and aircraft are complemented by ozonesonde data from 29 launch sites or field campaigns and by 21 non-polar and 17 polar ground-based station datasets. The datasets contain information on how long the observed air masses were isolated from land, as estimated by backward trajectories from the individual observation points. To extract observations representative of oceanic conditions, we recommend using a subset of the data with an isolation time of 72 h or longer, from the analysis with coincident radon observations. These filtered oceanic and polar data showed typically flat diurnal cycles at high latitudes, whereas daytime decreases in ozone (11 %–16 %) were observed at lower latitudes. The ship/buoy- and aircraft-based datasets presented here will supplement the land-based ones in the TOAR-II (Tropospheric Ozone Assessment Report Phase II) database to provide a fully global assessment of tropospheric ozone. The described dataset is available at https://doi.org/10.17596/0004044 (Kanaya et al., 2025).
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001046686 7001_ $$00000-0002-2728-5814$$aSommariva, Roberto$$b1
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001046686 7001_ $$0P:(DE-HGF)0$$aJohnson, James E.$$b6
001046686 7001_ $$00000-0002-2595-3911$$aColomb, Aurélie$$b7
001046686 7001_ $$00000-0001-5399-8730$$aTulet, Pierre$$b8
001046686 7001_ $$0P:(DE-HGF)0$$aMolloy, Suzie$$b9
001046686 7001_ $$0P:(DE-HGF)0$$aGalbally, Ian E.$$b10
001046686 7001_ $$00000-0002-0899-1369$$aVolkamer, Rainer$$b11
001046686 7001_ $$00000-0002-2909-5432$$aMahajan, Anoop$$b12
001046686 7001_ $$00000-0002-2977-4507$$aHalfacre, John W.$$b13
001046686 7001_ $$0P:(DE-HGF)0$$aShepson, Paul B.$$b14
001046686 7001_ $$00000-0002-1048-7962$$aSchmale, Julia$$b15
001046686 7001_ $$0P:(DE-HGF)0$$aAngot, Hélène$$b16
001046686 7001_ $$00000-0002-3366-6269$$aBlomquist, Byron$$b17
001046686 7001_ $$00000-0002-0973-9982$$aShupe, Matthew D.$$b18
001046686 7001_ $$0P:(DE-HGF)0$$aHelmig, Detlev$$b19
001046686 7001_ $$00000-0002-6525-4330$$aGil, Junsu$$b20
001046686 7001_ $$00000-0001-6622-7003$$aLee, Meehye$$b21
001046686 7001_ $$0P:(DE-HGF)0$$aCoburn, Sean C.$$b22
001046686 7001_ $$00000-0002-0067-617X$$aOrtega, Ivan$$b23
001046686 7001_ $$0P:(DE-HGF)0$$aChen, Gao$$b24
001046686 7001_ $$00000-0001-5397-2872$$aLee, James$$b25
001046686 7001_ $$0P:(DE-HGF)0$$aAikin, Kenneth C.$$b26
001046686 7001_ $$00000-0001-6312-2724$$aParrish, David D.$$b27
001046686 7001_ $$0P:(DE-HGF)0$$aHolloway, John S.$$b28
001046686 7001_ $$00000-0003-2800-7581$$aRyerson, Thomas B.$$b29
001046686 7001_ $$0P:(DE-HGF)0$$aPollack, Ilana B.$$b30
001046686 7001_ $$0P:(DE-HGF)0$$aWilliams, Eric J.$$b31
001046686 7001_ $$00000-0001-8721-8165$$aLerner, Brian M.$$b32
001046686 7001_ $$0P:(DE-HGF)0$$aWeinheimer, Andrew J.$$b33
001046686 7001_ $$00000-0002-7226-3569$$aCampos, Teresa$$b34
001046686 7001_ $$00000-0002-2661-6394$$aFlocke, Frank M.$$b35
001046686 7001_ $$0P:(DE-HGF)0$$aSpackman, J. Ryan$$b36
001046686 7001_ $$00000-0002-2875-1258$$aBourgeois, Ilann$$b37
001046686 7001_ $$00000-0002-9320-7101$$aPeischl, Jeff$$b38
001046686 7001_ $$00000-0002-7332-9945$$aThompson, Chelsea R.$$b39
001046686 7001_ $$00000-0002-6372-0414$$aStaebler, Ralf M.$$b40
001046686 7001_ $$0P:(DE-HGF)0$$aAliabadi, Amir A.$$b41
001046686 7001_ $$00000-0003-3635-0857$$aGong, Wanmin$$b42
001046686 7001_ $$00000-0002-1369-8853$$aVan Malderen, Roeland$$b43
001046686 7001_ $$0P:(DE-HGF)0$$aThompson, Anne M.$$b44
001046686 7001_ $$00000-0002-8583-7795$$aStauffer, Ryan M.$$b45
001046686 7001_ $$0P:(DE-HGF)0$$aKollonige, Debra E.$$b46
001046686 7001_ $$00000-0001-7972-085X$$aGómez Martin, Juan Carlos$$b47
001046686 7001_ $$00000-0001-5567-4692$$aFujiwara, Masatomo$$b48
001046686 7001_ $$0P:(DE-HGF)0$$aRead, Katie$$b49
001046686 7001_ $$00000-0002-5236-6536$$aRowlinson, Matthew$$b50
001046686 7001_ $$0P:(DE-HGF)0$$aSato, Keiichi$$b51
001046686 7001_ $$0P:(DE-HGF)0$$aKurokawa, Junichi$$b52
001046686 7001_ $$0P:(DE-HGF)0$$aIwamoto, Yoko$$b53
001046686 7001_ $$0P:(DE-HGF)0$$aTaketani, Fumikazu$$b54
001046686 7001_ $$00000-0001-5267-0792$$aTakashima, Hisahiro$$b55
001046686 7001_ $$0P:(DE-HGF)0$$aNavarro-Comas, Mónica$$b56
001046686 7001_ $$0P:(DE-HGF)0$$aPanagi, Marios$$b57
001046686 7001_ $$0P:(DE-Juel1)6952$$aSchultz, Martin G.$$b58
001046686 770__ $$aTOAR-II Community Special Issue
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