Abstract
We analyze positive trends of total ozone (TO) content over Tomsk, composed for different time intervals according to TO measurements with the use of М-124 ozonometer and employing TOMS/OMI/MLS satellite data. As a result of 2011 spring ozone anomaly in Arctic, the increasing TO trend of 1.09 DU/yr for the period of 1996 -2010 in Tomsk slowed down to 0.26 DU/yr for the period of 1996 - 2011. Afterward, the positive trend resumed recovery and became 0.65 DU/yr for the period 1996 -2013. In early 2014, the TO level lowered, primarily due to low temperatures in the Arctic stratosphere. Nonetheless, the positive TO trend for the period of 1996 - 2014 stayed at the level of 1996 – 2013 trend. At the same time, the annually average TO value had been 362 DU in 2014 versus 370 DU in 2013.
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