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@ARTICLE{Kanaya:1046686,
      author       = {Kanaya, Yugo and Sommariva, Roberto and Saiz-Lopez, Alfonso
                      and Mazzeo, Andrea and Koenig, Theodore K. and Kawana, Kaori
                      and Johnson, James E. and Colomb, Aurélie and Tulet, Pierre
                      and Molloy, Suzie and Galbally, Ian E. and Volkamer, Rainer
                      and Mahajan, Anoop and Halfacre, John W. and Shepson, Paul
                      B. and Schmale, Julia and Angot, Hélène and Blomquist,
                      Byron and Shupe, Matthew D. and Helmig, Detlev and Gil,
                      Junsu and Lee, Meehye and Coburn, Sean C. and Ortega, Ivan
                      and Chen, Gao and Lee, James and Aikin, Kenneth C. and
                      Parrish, David D. and Holloway, John S. and Ryerson, Thomas
                      B. and Pollack, Ilana B. and Williams, Eric J. and Lerner,
                      Brian M. and Weinheimer, Andrew J. and Campos, Teresa and
                      Flocke, Frank M. and Spackman, J. Ryan and Bourgeois, Ilann
                      and Peischl, Jeff and Thompson, Chelsea R. and Staebler,
                      Ralf M. and Aliabadi, Amir A. and Gong, Wanmin and Van
                      Malderen, Roeland and Thompson, Anne M. and Stauffer, Ryan
                      M. and Kollonige, Debra E. and Gómez Martin, Juan Carlos
                      and Fujiwara, Masatomo and Read, Katie and Rowlinson,
                      Matthew and Sato, Keiichi and Kurokawa, Junichi and Iwamoto,
                      Yoko and Taketani, Fumikazu and Takashima, Hisahiro and
                      Navarro-Comas, Mónica and Panagi, Marios and Schultz,
                      Martin G.},
      title        = {{O}bservational ozone datasets over the global oceans and
                      polar regions (version 2024)},
      journal      = {Earth system science data},
      volume       = {17},
      number       = {9},
      issn         = {1866-3508},
      address      = {Katlenburg-Lindau},
      publisher    = {Copernics Publications},
      reportid     = {FZJ-2025-03912},
      pages        = {4901 - 4932},
      year         = {2025},
      note         = {ESDE},
      abstract     = {Studying 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).},
      cin          = {JSC},
      ddc          = {550},
      cid          = {I:(DE-Juel1)JSC-20090406},
      pnm          = {5111 - Domain-Specific Simulation $\&$ Data Life Cycle Labs
                      (SDLs) and Research Groups (POF4-511) / Earth System Data
                      Exploration (ESDE)},
      pid          = {G:(DE-HGF)POF4-5111 / G:(DE-Juel-1)ESDE},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.5194/essd-17-4901-2025},
      url          = {https://juser.fz-juelich.de/record/1046686},
}