TY  - JOUR
AU  - Kanaya, Yugo
AU  - Sommariva, Roberto
AU  - Saiz-Lopez, Alfonso
AU  - Mazzeo, Andrea
AU  - Koenig, Theodore K.
AU  - Kawana, Kaori
AU  - Johnson, James E.
AU  - Colomb, Aurélie
AU  - Tulet, Pierre
AU  - Molloy, Suzie
AU  - Galbally, Ian E.
AU  - Volkamer, Rainer
AU  - Mahajan, Anoop
AU  - Halfacre, John W.
AU  - Shepson, Paul B.
AU  - Schmale, Julia
AU  - Angot, Hélène
AU  - Blomquist, Byron
AU  - Shupe, Matthew D.
AU  - Helmig, Detlev
AU  - Gil, Junsu
AU  - Lee, Meehye
AU  - Coburn, Sean C.
AU  - Ortega, Ivan
AU  - Chen, Gao
AU  - Lee, James
AU  - Aikin, Kenneth C.
AU  - Parrish, David D.
AU  - Holloway, John S.
AU  - Ryerson, Thomas B.
AU  - Pollack, Ilana B.
AU  - Williams, Eric J.
AU  - Lerner, Brian M.
AU  - Weinheimer, Andrew J.
AU  - Campos, Teresa
AU  - Flocke, Frank M.
AU  - Spackman, J. Ryan
AU  - Bourgeois, Ilann
AU  - Peischl, Jeff
AU  - Thompson, Chelsea R.
AU  - Staebler, Ralf M.
AU  - Aliabadi, Amir A.
AU  - Gong, Wanmin
AU  - Van Malderen, Roeland
AU  - Thompson, Anne M.
AU  - Stauffer, Ryan M.
AU  - Kollonige, Debra E.
AU  - Gómez Martin, Juan Carlos
AU  - Fujiwara, Masatomo
AU  - Read, Katie
AU  - Rowlinson, Matthew
AU  - Sato, Keiichi
AU  - Kurokawa, Junichi
AU  - Iwamoto, Yoko
AU  - Taketani, Fumikazu
AU  - Takashima, Hisahiro
AU  - Navarro-Comas, Mónica
AU  - Panagi, Marios
AU  - Schultz, Martin G.
TI  - Observational ozone datasets over the global oceans and polar regions (version 2024)
JO  - Earth system science data
VL  - 17
IS  - 9
SN  - 1866-3508
CY  - Katlenburg-Lindau
PB  - Copernics Publications
M1  - FZJ-2025-03912
SP  - 4901 - 4932
PY  - 2025
N1  - ESDE
AB  - 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).
LB  - PUB:(DE-HGF)16
DO  - DOI:10.5194/essd-17-4901-2025
UR  - https://juser.fz-juelich.de/record/1046686
ER  -