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通过对来自珠江口万顷沙W2孔的沉积物进行AMS 14 C测年,结合古地磁测试以及孢粉分析结果,并与其他相关记录综合对比,建立了该地区全新世以来的年代框架。使用粒度组合特征以及磁化率等环境代用指标,获取了该地区约6000cal yr BP以来的气候环境变化信息。经过分析与对比,认为该区自中全新世以来,经历了暖干-凉湿-温湿3个气候环境变化阶段。在晚全新世中国南方地区气候(尤其是降雨量)发生了重要的变化,这与北半球太阳辐射减弱,气温降低,亚洲季风减弱,降雨带南移有着一致的对应关系,同时还很可能与这一时期厄尔尼诺—南方涛动活动加强有着紧密的联系。
The AMS 14 C dating of W2 in the Pearl River estuary was combined with the paleomagnetic test and the results of sporopollen analysis and compared with other related records to establish the annual framework since Holocene. By using the characteristics of grain-size combination and the proxies of environmental proxies such as susceptibility, the climate change information of about 6000 cal yr BP in the area has been obtained. After analysis and comparison, it is considered that the area has experienced three phases of climate change: warm-dry-cool-wet-warm-humid period since the middle Holocene. In the late Holocene, significant changes have taken place in the climate (especially rainfall) in the southern part of the country, which is consistent with the weaker solar radiation in the northern hemisphere, lower temperature, weaker Asian monsoon and southward rainfall, During a period of time El Niño-South Oscillation intensified its close ties.