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通过对比南北半球高纬冰心记录、热带海洋记录及中国黄土古气候记录,获得末次冰期全球气候变化的两套模式的认识。一套模式以格陵兰冰心记录为代表,具有高频变化、等值波动、快速转换等特征。另一套模式以苏禄海、南极冰心记录为代表,表现为与全球冰量变化相似的特征。中国黄土粒度记录了两套模式的过渡类型。两套模式反映了全球气候系统的两套连通机制,一套是通过冰量变化—海面变化,传达气候变化信息;另一套是通过冰量变化—大气圈波动—粉尘、水汽波动,引起气候系统的不稳定性变化。作为两套模式的过渡类型,黄土粒度的冰量变化特征可能是沙漠界限变化的反映,而短周期波动则可能与冬季风强度变化有关。黄土粒度的短周期波动与格陵兰冰心记录的较好对比说明它们之间存在由大气圈过程(包括大气环流、粉尘和水汽等)传递的联系。
By comparing the high-latitude ice core records in the northern and southern hemisphere, the tropical ocean records and the records of ancient Chinese loess paleoclimate, we can get two sets of patterns of global climate change in the last ice age. A set of patterns represented by Greenland ice heart records, with high frequency changes, equivalent fluctuations, rapid conversion and other characteristics. Another model, represented by the Sulu Sea and Antarctic ice core records, is similar to the global ice volume change. China loess particle size recorded two sets of model transitional types. The two models reflect two sets of connectivity mechanisms of the global climate system: one is through the change of ice volume - the change of sea level to convey the information of climate change; the other is through the change of ice volume - the fluctuation of the atmosphere - the fluctuation of dust and water vapor, System instability changes. As a transitional pattern of the two models, the variation of ice volume in the loess particle size may be a reflection of the changes of the desert boundary, while the short-period fluctuation may be related to the change of the winter monsoon intensity. A good contrast between the short-period fluctuations of loess grain size and the Greenland ice core records suggests that there is a link between them through the atmospheric processes, including atmospheric circulation, dust and water vapor.