Oscillation in Evolution of Cooperation for Addressing Climate Change

<正> Climate protection is a problem of sustaining a public resource.All countries of the world should takeaction to deal with climate change.However,such an action is actually a game process where each country chooses tocooperate or defect under constrained condition.Here we study the group behavior of countries in dealing with climatechange.In our study,the countries of the world are considered as players who are distributed on an assumed spatialnetwork.A new evolution rule is proposed to model the game process among the players.Our extensive experimentsdemonstrate that under constrained condition,the local psychology of players possibly results in the formation of localgroup.Some local and global oscillations can be found where part or all of the players change their choices periodically.