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依据珠江三角洲QZK6钻孔孢粉组合特征及AMS14C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°C,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°C,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°C,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°C,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。
According to the characteristics of sporopollen assemblage of QZK6 boreholes in the Pearl River Delta and the dating results of AMS14C, the sporopollen assemblages were analyzed by CONISS software. The results were divided into four sporopollen zones A, B, C and D. Based on the characteristics of sporopollen assemblages since 10981 aa BP and the sporopollen assemblages of surface soil samples from 122 natural vegetations located in Guangdong in the East Asia Sporopollen database, the Polygon 1.5 software was used to quantitatively reconstruct Holocene palaeoclimate parameters of QZK6 . The results show that the climate of Holocene is dominated by warm and humid, with the general trend of dry-hot-humid-warm. The mean annual temperature of D-band (10981 ~ 8500 cal cal) is 21.7 ~ 22.1 ° C, and annual precipitation is 1778 ~ 1888mm , Average annual temperature and annual precipitation are relatively high. The average annual temperature of C band (8500 ~ 8105 a cal BP) is 21.9 ~ 22.3 ° C and the annual precipitation is 1845 ~ 1929mm, reaching the highest value in each band; B band (8105 ~ 4343a cal BP) annual average temperature and annual precipitation began to decrease with an average annual temperature of 20.8 ~ 21.7 ° C and an annual precipitation of 1595 ~ 1806mm. Human activity increased from zone B (strongest in zone A); zone A (4343a cal BP to date) had an average annual temperature of 20.3-21.5 ° C and an annual rainfall of 1587-1765 mm, The lowest, the least amount of precipitation in the stage.