Open AccessThe research of detecting abrupt climate change with approximate entropy
Author(s) -
Qiguang Wang,
Zengping Zhang
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.1976
Subject(s) - climate change , entropy (arrow of time) , precipitation , homogeneity (statistics) , statistical physics , environmental science , climatology , meteorology , mathematics , geology , thermodynamics , physics , statistics , oceanography
The approximate entropy method is applied to an ideal time series. It is indicated that the method is capable of distinguishing between different structural dynamics and detecting structural dynamics mutation. And thenthis method is applied to the observation data of the daily temperature and precipitation of the 740 sites between 1960 and 2000. The results showed thatthe approximate entropy distribution of the temperature and precipitation has a characteristic of obvious district distributionand displays the territorial difference of dynamic structures of climate system. Abrupt climate changes have been detected by the approximate entropy of the annual precipitation and temperature between 1970s and 1980s. The characteristics of the in homogeneity of temporal and spatial distribution of abrupt climate changes and the complexity of climate systems have been demonstrated.