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根据沉积物特征、粒度、黏土矿物、碳,氮比值、孢粉和藻类的变化规律等,揭示了海南岛热带玛珥湖的演化历史和短尺度的气候变化规律,证明了玛珥湖沉积系统对短尺度气候变化的响应是敏感的,反映出热带湖泊的全新世高温期为7200~2700 aBP.同时,在高温期也存在短尺度的气候波动,如7250~6120,4460,3850和2700 aBP等时间段存在振荡式的气候快速变化.晚全新世,尤其在近于2700aBP,各综合分析结果均反映了气候的明显变化,它标志着在2.7 ka左右东亚热带区域的气候模式可能发生了重大转折,可能与厄尔尼诺-南方涛动现象的增强存在一定的相关性.另外,高分辨率藻类记录还清楚地揭示了在最近的2.5 ka内存在长度约为0.5 ka的气候周期性变化.
Based on the characteristics of sediment, grain size, clay mineral, carbon and nitrogen ratio, pollen and algae, the evolution history and short-range climate change of the tropical Maar Lake in Hainan Island are revealed. It is proved that the Maar Lake sedimentary system Response to short-range climate change is sensitive, reflecting the tropical period of the Holocene high temperature period of 7200 ~ 2700 aBP. At the same time, there are short-term climate fluctuations at high temperature, such as 7250 ~ 6120,4460,3850 and 2700 aBP In the late Holocene, especially at nearly 2700 a BP, the results of the comprehensive analysis reflect the obvious climate change, which indicates that the climate model may be significant in the East Asian subtropical region around 2.7 ka The turning point may be related to the increase of El Niño-Southern Oscillation.In addition, the high-resolution algal record also clearly reveals that there is a cyclical variation of climate with a length of about 0.5 ka in the recent 2.5 ka.