基于孢粉数据的珠江三角洲QZK6孔全新世气候定量重建  

Quantitative reconstruction of Holocene climate based on pollen data from drill hole QZK6 in Pearl River Delta

作　　者：赵信文[1] 罗传秀[2] 陈双喜[1] 黄长生[1] 郑卓[3] 董浩刚 曾敏[1] 陈雯[1] 刘凤梅[1] 黎义勇[1] 邵磊[1] 

机构地区：[1]中国地质调查局武汉地质调查中心,湖北武汉430205 [2]中国科学院南海海洋研究所,广东广州510301 [3]中山大学地球科学系,广东广州510275

出　　处：《地质通报》2014年第10期1621-1628,共8页Geological Bulletin of China

基　　金：中国地质调查局项目(编号:1212011120174;1212011220012);中国科学院海洋地质与环境重点实验室开放基金项目(编号:MGE2012KG03)

摘　　要：依据珠江三角洲QZK6钻孔孢粉组合特征及AMS^14C测年结果，基于CONISS软件对剖面孢粉组合进行分带分析，其结果分为A、B、C和D四个孢粉带。根据10981a cal BP以来的孢粉组合特点，结合东亚孢粉数据库中位于广东的122个天然植被下的表层土壤样点的孢粉组成特征，利用软件Polygon 1.5定量重建了QZK6孔的全新世古气候参数。结果显示，全新世气候基本以暖湿为主，总体趋势为凉干-热湿-温凉；D带（10981-8500a cal BP）年均温度为21.7-22.1℃，年降水量1778-1888mm，年均温度和年降水量均比较高；C带（8500-8105a cal BP）年均温度为21.9-22.3℃，年降水量为1845-1929mm，达到各带中最高值；B带（8105-4343a cal BP）年均温度和年降水量开始降低，年均温度为20.8-21.7℃，年降水量为1595-1806mm。人类活动从B带开始增强（在A带达到最强）；A带（4343a cal BP至今）年均温度为20.3-21.5℃，年降水量为1587-1765 mm，为各带中年均温度最低、年降水量最少的阶段。Based on the Pearl Delta QZK6 drill hole sporo-pollen assemblage characteristics and AMS^14C dating results, the authors determined four pollen assemblages from A to D by using CONISS software. Moreover, according to the characteristics of the sur-face-soil pollen composition induced from the 122 existing samples for the native vegetation environment in Guangdong region of the East Asian Pollen Data Bank, the paleoclimate parameters, including paleoannual temperature and paleo-annual precipitation, were quantitatively reconstructed since 10981a cal BP by Polygon 1.5 software. Consequently, Zone D, 10981-8500a cal BP, was warmer and more humid, with annual temperature of 21.7-22.1℃ and annual precipitation of 1778-1888mm; Zone C, 8500-8105cal BP, 21.9-22.3℃ and 1845-1929mm, was the warmest and most humid among the four zones;Zone B, 8105-4343a cal BP, had the following features：the temperature and precipitation decreased to 20.8-21.7℃ and 1595-1806mm with increasing human activity （though such an activity would reach its strongest in Zone A）;Zone A, 4343a cal BP to the present, 20.3-21.5℃ and 1587-1765mm, has had the lowest temperature and humidity among the four zones.

关 键 词：珠江三角洲 孢粉分析 全新世 定量气候重建 

分 类 号：P534.632[天文地球—第四纪地质学] Q914.2[天文地球—古生物学与地层学]