Long-memory processes in global ozone and temperature variations

C. Varotsos (1, 2) , D. Kirk-Davidoff (2)

1 Department of Applied Physics [Athens]
2 AOSC - Department of Atmospheric and Oceanic Science [College Park]

Global column ozone and tropospheric temperature observations made by ground-based (1964?2004) and satellite-borne (1978?2004) instrumentation are analyzed. Ozone and temperature fluctuations in small time-intervals are found to be positively correlated to those in larger time-intervals in a power-law fashion. For temperature, the exponent of this dependence is larger in the mid-latitudes than in the tropics at long time scales, while for ozone, the exponent is larger in tropics than in the mid-latitudes. The ability of the models to reproduce this scaling could be a good test for improved predictions of future variations in ozone layer and global warming.

Domaines: Océan, Atmosphère

C. Varotsos, D. Kirk-Davidoff. Long-memory processes in global ozone and temperature variations. Atmospheric Chemistry and Physics Discussions, 2006, 6 (3), pp.4325-4340. ⟨hal-00301337⟩