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Periodic oscillations in millennial global-mean temperature and their causes

查看全文 作  者:QIAN WeiHong LU [1]Bo 高影响力作者 机构地区:[1]Monsoon and Environment Research Group, School of Physics, Peking University, Beijing 100871, China高影响力机构 出  处:《Chinese Science Bulletin》索引2010年第55卷第35期,共6页高影响力期刊 摘  要:Time series of solar radiation and north Pacific sea surface temperature(SST) index were used to analyze their causality relationship with various periodic oscillations in reconstructed millennial global-mean temperature series.The three long-term periods of the Medieval Warm Period(MWP),Little Ice Age(LIA) and recent Global Warming Period(GWP) were distinct in the temperature series.21-year,65-year,115-year and 200-year oscillations were derived from the temperature series after removing three long-term climatic temperatures.The phases of temperature oscillations significantly lagged behind oceanic SST and solar radiation variability.The recent decadal warm period was caused by the quasi-21-year temperature oscillation.At this century-cross period,the four oscillations reached their peaks simultaneously,which did not occur during the last millennium.Based on the long-term trend during the GWP and the four periodic oscillations,global-mean temperature is expected to drop to a new cool period in the 2030s and then a rising trend would be towards to a new warm period in the 2060s. 关 键 词:周期振荡 平均温度 中世纪暖期 原因 千禧 全球平均气温 太阳辐射 温度振荡
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