000845669 001__ 845669 000845669 005__ 20240712101051.0 000845669 0247_ $$2doi$$a10.1525/elementa.291 000845669 0247_ $$2Handle$$a2128/18535 000845669 0247_ $$2WOS$$aWOS:000431754000001 000845669 0247_ $$2altmetric$$aaltmetric:40976828 000845669 037__ $$aFZJ-2018-02881 000845669 041__ $$aEnglish 000845669 082__ $$a550 000845669 1001_ $$0P:(DE-HGF)0$$aGaudel, A.$$b0$$eCorresponding author 000845669 245__ $$aTropospheric Ozone Assessment Report: Present-day distribution and trends of tropospheric ozone relevant to climate and global atmospheric chemistry model evaluation 000845669 260__ $$aWashington, DC$$bBioOne$$c2018 000845669 3367_ $$2DRIVER$$aarticle 000845669 3367_ $$2DataCite$$aOutput Types/Journal article 000845669 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1526360851_6672 000845669 3367_ $$2BibTeX$$aARTICLE 000845669 3367_ $$2ORCID$$aJOURNAL_ARTICLE 000845669 3367_ $$00$$2EndNote$$aJournal Article 000845669 520__ $$aThe Tropospheric Ozone Assessment Report (TOAR) is an activity of the International Global Atmospheric Chemistry Project. This paper is a component of the report, focusing on the present-day distribution and trends of tropospheric ozone relevant to climate and global atmospheric chemistry model evaluation. Utilizing the TOAR surface ozone database, several figures present the global distribution and trends of daytime average ozone at 2702 non-urban monitoring sites, highlighting the regions and seasons of the world with the greatest ozone levels. Similarly, ozonesonde and commercial aircraft observations reveal ozone’s distribution throughout the depth of the free troposphere. Long-term surface observations are limited in their global spatial coverage, but data from remote locations indicate that ozone in the 21st century is greater than during the 1970s and 1980s. While some remote sites and many sites in the heavily polluted regions of East Asia show ozone increases since 2000, many others show decreases and there is no clear global pattern for surface ozone changes since 2000. Two new satellite products provide detailed views of ozone in the lower troposphere across East Asia and Europe, revealing the full spatial extent of the spring and summer ozone enhancements across eastern China that cannot be assessed from limited surface observations. Sufficient data are now available (ozonesondes, satellite, aircraft) across the tropics from South America eastwards to the western Pacific Ocean, to indicate a likely tropospheric column ozone increase since the 1990s. The 2014–2016 mean tropospheric ozone burden (TOB) between 60˚N–60˚S from five satellite products is 300 Tg ± 4%. While this agreement is excellent, the products differ in their quantification of TOB trends and further work is required to reconcile the differences. Satellites can now estimate ozone’s global long-wave radiative effect, but evaluation is difficult due to limited in situ observations where the radiative effect is greatest. 000845669 536__ $$0G:(DE-HGF)POF3-243$$a243 - Tropospheric trace substances and their transformation processes (POF3-243)$$cPOF3-243$$fPOF III$$x0 000845669 536__ $$0G:(DE-HGF)POF3-512$$a512 - Data-Intensive Science and Federated Computing (POF3-512)$$cPOF3-512$$fPOF III$$x1 000845669 536__ $$0G:(DE-Juel-1)ESDE$$aEarth System Data Exploration (ESDE)$$cESDE$$x2 000845669 588__ $$aDataset connected to CrossRef 000845669 7001_ $$0P:(DE-HGF)0$$aCooper, O. R.$$b1 000845669 7001_ $$0P:(DE-HGF)0$$aAncellet, G.$$b2 000845669 7001_ $$0P:(DE-HGF)0$$aBarret, B.$$b3 000845669 7001_ $$0P:(DE-HGF)0$$aBoynard, A.$$b4 000845669 7001_ $$0P:(DE-HGF)0$$aBurrows, J. P.$$b5 000845669 7001_ $$0P:(DE-HGF)0$$aClerbaux, C.$$b6 000845669 7001_ $$0P:(DE-HGF)0$$aCoheur, P. -F.$$b7 000845669 7001_ $$0P:(DE-HGF)0$$aCuesta, J.$$b8 000845669 7001_ $$0P:(DE-HGF)0$$aCuevas, E.$$b9 000845669 7001_ $$0P:(DE-HGF)0$$aDoniki, S.$$b10 000845669 7001_ $$0P:(DE-HGF)0$$aDufour, G.$$b11 000845669 7001_ $$0P:(DE-HGF)0$$aEbojie, F.$$b12 000845669 7001_ $$0P:(DE-HGF)0$$aForet, G.$$b13 000845669 7001_ $$0P:(DE-HGF)0$$aGarcia, O.$$b14 000845669 7001_ $$0P:(DE-HGF)0$$aGranados Muños, M. J.$$b15 000845669 7001_ $$0P:(DE-HGF)0$$aHannigan, J. W.$$b16 000845669 7001_ $$0P:(DE-HGF)0$$aHase, F.$$b17 000845669 7001_ $$0P:(DE-HGF)0$$aHuang, G.$$b18 000845669 7001_ $$0P:(DE-HGF)0$$aHassler, B.$$b19 000845669 7001_ $$0P:(DE-HGF)0$$aHurtmans, D.$$b20 000845669 7001_ $$0P:(DE-HGF)0$$aJaffe, D.$$b21 000845669 7001_ $$0P:(DE-HGF)0$$aJones, N.$$b22 000845669 7001_ $$0P:(DE-HGF)0$$aKalabokas, P.$$b23 000845669 7001_ $$0P:(DE-HGF)0$$aKerridge, B.$$b24 000845669 7001_ $$0P:(DE-HGF)0$$aKulawik, S. S.$$b25 000845669 7001_ $$0P:(DE-HGF)0$$aLatter, B.$$b26 000845669 7001_ $$0P:(DE-HGF)0$$aLeblanc, T.$$b27 000845669 7001_ $$0P:(DE-HGF)0$$aLe Flochmoën, E.$$b28 000845669 7001_ $$0P:(DE-HGF)0$$aLin, W.$$b29 000845669 7001_ $$0P:(DE-HGF)0$$aLiu, J.$$b30 000845669 7001_ $$0P:(DE-HGF)0$$aLiu, X.$$b31 000845669 7001_ $$0P:(DE-HGF)0$$aMahieu, E.$$b32 000845669 7001_ $$0P:(DE-HGF)0$$aMcClure-Begley, A.$$b33 000845669 7001_ $$0P:(DE-HGF)0$$aNeu, J. L.$$b34 000845669 7001_ $$0P:(DE-HGF)0$$aOsman, M.$$b35 000845669 7001_ $$0P:(DE-HGF)0$$aPalm, M.$$b36 000845669 7001_ $$0P:(DE-HGF)0$$aPetetin, H.$$b37 000845669 7001_ $$0P:(DE-HGF)0$$aPetropavlovskikh, I.$$b38 000845669 7001_ $$0P:(DE-HGF)0$$aQuerel, R.$$b39 000845669 7001_ $$0P:(DE-HGF)0$$aRahpoe, N.$$b40 000845669 7001_ $$0P:(DE-HGF)0$$aRozanov, A.$$b41 000845669 7001_ $$0P:(DE-Juel1)6952$$aSchultz, Martin$$b42 000845669 7001_ $$0P:(DE-HGF)0$$aSchwab, J.$$b43 000845669 7001_ $$0P:(DE-HGF)0$$aSiddans, R.$$b44 000845669 7001_ $$0P:(DE-HGF)0$$aSmale, D.$$b45 000845669 7001_ $$0P:(DE-HGF)0$$aSteinbacher, M.$$b46 000845669 7001_ $$0P:(DE-HGF)0$$aTanimoto, H.$$b47 000845669 7001_ $$0P:(DE-HGF)0$$aTarasick, D. W.$$b48 000845669 7001_ $$0P:(DE-HGF)0$$aThouret, V.$$b49 000845669 7001_ $$0P:(DE-HGF)0$$aThompson, A. 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