Arianna Religi PhD student at the University of Geneva, Brewer user
During my master thesis “Study of trends and variability of total column ozone on a global and national scale” at the University La Sapienza of Rome, I examined the variability of the total ozone content (TOC) all over the world and over north-central Italy in order to detect possible trends. In particular for the national scale, I used three data sets:
- ground-based TOC measurements using the MKIV Brewer #067 at Rome (41.9°N, 12.5°E, 75 m a.s.l) for the period 1992-2012, the MKIV Brewer #066 at Aosta (45.7°N, 7.4°E, 569 m a.s.l) for the period 2007-2012 and a narrow-band filter UV radiometer (UVRAD) at Bologna (44.5°N, 11.2°E, 60 m a.s.l.) for the period 2005-2012;
- total ozone satellite (TOMS v. 8, OMI v. 8.5) data over Rome for the period 1992 up to 2012 and OMI data from 2004 to 2012 for the other sites;
- reconstructed TOC time series built within the framework of the COST Action 726 “Long –term changes and climatology of UV radiation over Europe”, for the period 1950 up to 2009.
At first I did a climatological characterization to find anomalies or fluctuations in dataset, after I did a descriptive statistical analysis on daily, monthly and annual bases. The long term variability and the change point years were detected by using non parametric trend tests. Finally I tried to find a connection between ozone variability and a few indexes (NAO, Solar Flux, AO, SOI…) using a multiple linear regression.
Reference: The Meteorology Group G-Met, Physcis Department – University of Rome “Sapienza” http://server2.phys.uniroma1.it/gr/gmet/
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