2010/01/15 by M. Álvarez Madrigal, M. Alvarez Madrigal, Madrigal, M. Alvarez +6
Earth and Planetary Sciences · Physics and Astronomy · #Atmospheric Ozone and Climate #Atmospheric and Oceanic Physics (physics.ao-ph) #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Ionosphere and magnetosphere dynamics #Solar and Space Plasma Dynamics #hep-ph #physics.ao-ph
paper · pdf · doi:10.48550/arxiv.1001.2794
14 pages and 4 figures
arxiv created 2010/01/15 · openalex publication_date 2010/01/15 · arxiv updated 2010/02/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The Antarctic region in which severe ozone depletion has taken place is known as the ozone hole. This region has two basic indicators: the area, where the ozone abundance is low (size), and the quantity of ozone mass deficit (depth). The energetic particles that penetrate deeply into the atmosphere and galactic cosmic rays (GCR) modify the ozone abundance in the stratosphere. With this research project, we are looking for evidence of a connection between variations in the cosmic ray flux and variations in the size of the ozone hole. In addition, we are looking for signs of the kind of processes that physically connect GCR fluxes with variations in the stratospheric ozone hole size (OHS) in the Antarctic region. With this goal in mind, we also analyze here the atmospheric temperature (AT) anomalies, which have often been linked with such variations. Using Morlet's wavelet spectral analysis to compute the coherence between two time series, we found that during the analyzed period (1982-2005), there existed a common signal of around 3 and 5 years between the OHS and GCR time series, during September and November, respectively. In both cases, the relationship showed a time-dependent anti-correlation between the two series. On the other hand, for October the analysis showed a time-dependent correlation that occurs around 1.7 years. These results seem to indicate that there exist at least two kinds of modulation processes of GCR fluxes on the OHS that work simultaneously but that change their relative relevance along the timeline.