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001     911534
005     20240712100823.0
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037 _ _ |a FZJ-2022-04794
082 _ _ |a 620
100 1 _ |a Hong, Jin
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245 _ _ |a The Long-Term Trends and Interannual Variability in Surface Ozone Levels in Beijing from 1995 to 2020
260 _ _ |a Basel
|c 2022
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520 _ _ |a Tropospheric ozone is an important atmospheric pollutant as well as an efficient greenhousegas. Beijing is one of the cities with the most serious ozone pollution. However, long-term date ofobserved ozone in Beijing are limited. In this paper, we combine the measurements of the In-serviceAircraft for a Global Observing System (IAGOS), ozonesonde observations as well as the recentlyavailable ozone monitoring network observations to produce a unique data record of surface ozone(at 14:00 Beijing time) in Beijing from 1995 to 2020. Using this merged dataset, we investigate thevariability in surface ozone in Beijing on multiple timescales. The long-term change is primarilycharacterized by a sudden drop in 2011–2012 with an insignificant linear trend during the full pe-riod. Based on CAM-chem model simulations, meteorological factors played important roles in the2011–2012 ozone drop. Before and after this sudden drop, ozone levels in Beijing increased signif-icantly by 0.42 ± 0.27 ppbv year − 1 before 2011 and 0.43 ± 0.41 ppbv year − 1 after 2013. We alsofound a substantial increase in the amplitude of the ozone annual cycle in Beijing, which has notbeen documented in previous studies. This is consistent with ozone increases in summer and ozonedecreases in winter. In addition, the results by the Ensemble Empirical Mode Decomposition (EEMD)analysis indicate significant interannual variations in ozone levels in Beijing with different timeoscillation periods, which may be associated with natural variabilities and subsequent changes inmeteorological conditions.
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700 1 _ |a Wang, Wuke
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|e Corresponding author
700 1 _ |a Bai, Zhixuan
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700 1 _ |a Bian, Jianchun
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700 1 _ |a Tao, Mengchu
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700 1 _ |a Konopka, Paul
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700 1 _ |a Ploeger, Felix
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700 1 _ |a Müller, Rolf
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700 1 _ |a Wang, Hongyue
|b 8
700 1 _ |a Zhang, Jinqiang
|b 9
700 1 _ |a Zhao, Shuyun
|b 10
700 1 _ |a Zhu, Jintao
|b 11
773 _ _ |a 10.3390/rs14225726
|g Vol. 14, no. 22, p. 5726 -
|0 PERI:(DE-600)2513863-7
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|p 5726 -
|t Remote sensing
|v 14
|y 2022
|x 2072-4292
856 4 _ |u https://juser.fz-juelich.de/record/911534/files/remotesensing-14-05726-v2.pdf
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