Physics – Atmospheric and Oceanic Physics
Scientific paper
2002-12-10
Physics
Atmospheric and Oceanic Physics
5 pages, 4 including eps figures
Scientific paper
10.1103/PhysRevE.68.046133
We use several variants of the detrended fluctuation analysis to study the appearance of long-term persistence in temperature records, obtained at 95 stations all over the globe. Our results basically confirm earlier studies. We find that the persistence, characterized by the correlation C(s) of temperature variations separated by s days, decays for large s as a power law, C(s) ~ s^(-gamma). For continental stations, including stations along the coastlines, we find that gamma is always close to 0.7. For stations on islands, we find that gamma ranges between 0.3 and 0.7, with a maximum at gamma = 0.4. This is consistent with earlier studies of the persistence in sea surface temperature records where gamma is close to 0.4. In all cases, the exponent gamma does not depend on the distance of the stations to the continental coastlines. By varying the degree of detrending in the fluctuation analysis we obtain also information about trends in the temperature records.
Bunde Armin
Eichner Jan F.
Havlin Shlomo
Koscielny-Bunde Eva
Schellnhuber Hans J.
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