Comparative Spectral Analysis and Correlation Properties of Observed and Simulated Total Column Ozone Records

Abstract

We present a statistical analysis of total column ozone records obtained from satellite measurements and from two global climate chemistry models on global scale. Firstly, a spectral weight analysis is performed where the relative strength of semiannual, annual and quasi-biennial oscillations are determined with respect to the integrated power spectra. The comparison reveals some anomalies in the model representations at each spectral component. The tails of the spectra demonstrate that both models underestimate high frequency (daily) ozone variability, which might have a complex origin, since several dynamical processes affect short time changes of the ozone level at a given location. Secondly, detrended fluctuation analysis is exploited to analyze two-point correlations of anomaly time series. Both models reproduce the characteristic geographic dependence of correlation strength over the overlapping area with empirical observations (latitude band between 60• S and 60• N). The values of precise correlation exponents are hard to obtain over regions where quasi-biennial oscillations or other strong nonstationarities (ozone hole) are present. In spite of all the numerical difficulties, significant long range correlations are detected for total ozone over all geographic locations.

Reconciliation of essential process parameters for an enhanced predictability of Arctic stratospheric ozone loss and its climate interactions (RECONCILE): activities and results

“…The differences are small but significant over the Northern Hemisphere. The pattern reproduces the behaviour of the same quantity obtained for measured data (Homonnai et al, 2013), i.e. increased correlation strength over the equatorial and polar regions.…”

“…The values of precise correlation exponents are hard to obtain over regions where QBO or other strong nonstationarities (ozone hole) are present; however, the missing QBO component in the LMDz-Reprobus data has no demonstrable effects away from the narrow equatorial band. In spite of all the numerical difficulties, significant long-range correlations are detected for total ozone over all geographic locations (Homonnai et al, 2013). The results on higher order nonlinear correlations will be reported elsewhere.…”

“…In a preparatory study, Homonnai et al (2013) have tested the methodology by a global statistical analysis of total column ozone records obtained from satellite measurements (Bodeker Scientific, http://www.bodekerscientific.com/) and from two CCMs, the original version of LMDz-Reprobus and the model of the Meteorological Research Institute, Tsukuba, Japan (MRI). The latter was chosen because its dynamical core is very similar to LMDz with a seemingly important difference of producing QBO signal along the equator.…”

Planetáris környezetünk veszélyeztetése és megmentése

“…565  A hazai mérések és elemzések igazolták, hogy a veszélyes változások folyamatban vannak [Loksa, 1991 566 ;Bozó, 1991;Rontó et al, 1993 567 ;Tóth, 2000;Faragó, 2001]. Majd újabb tudományos közlemények segítették e globális környezeti témában való eligazodást [Kerényi, 2003: 323-330. o.;Tóth, 2007;Haszpra, 2011a;Salma, 2012;Homonnai et al, 2013;Várai et al, 2015;Antal, 2016;. Külön is említendő a megemelkedett szintű ultraibolya sugárzásból adódó egészségi ártalmak kifejtése [Páldy, 2016;Antal, Páldy & Tóth, 2019].…”

Műholdas és ballonszondás mérésekkel meghatározott légköri ózon és nedvességi karakterisztikák klimatológiai vizsgálata

“…Elsőként az LMDz-Reprobus modellbe történt meg az új séma beépítése, ezért vizsgálataimat főként erre a modellre összpontosítottam. Az LMDz modellt műholdas megfigyelések mellett egy másik csatolt kémiai klímamodellel is összehasonlítottunk, majd az új parametrizációs sémával kiegészült verziót vetettünk össze a korábbi modellverzióval (Homonnai et al, 2013).…”