邯郸地区晚更新世以来植被波动特征及其对气候变化的响应

Characteristics of Vegetation Fluctuation as well as Consequent Impact on Climate since Late Pleistocene in Handan Area,Hebei

对河北邯郸HZ-S孔沉积物进行孢粉分析,结果表明该地区晚更新世以来的气候演变形式既有与全球同步的特点,也有本区域独自的特征。古气候与古植被演变过程如下:(1)晚更新世末次间冰期气候温暖湿润(130～75kaBP),植被为森林草原;末次冰期气候演化经历了寒冷干燥(75～55kaBP)→温暖湿润(40～30kaBP)→寒冷干燥(30～10kaBP)的过程,植被演替过程相应为草原→森林草原→草原。(2)全新世气候演化经历了温凉略干(10～8kaBP)→温暖湿润(8～3kaBP)→温凉偏干(3～0kaBP)的过程,植被演替过程相应为疏林草原→森林草原→疏林草原。(3)发生在25kaBP左右,16kaBP左右和11～10kaBP的冷事件可能是Heinrich事件3、1和Younger Dryas事件在中国东部季风区的响应。

Based on the spore-pollen analysis of the core HZ-S,in Handan region,Hebei Province.The results show that the Handan region＇s climate since the Late Pleistocene evolution of the form of both the characteristics of the global synchronization,but also the characteristics of the region alone.The evolutional stages of palaeoclimate and palaeovegetation are recognized in the following：（1） During the Late Pleistocene,the climatic changes were from warm and humid（130 ～ 75 kaBP） → cool and dry（75 ～ 55 kaBP） →warm and humid（40 ～ 30 kaBP） →cool and dry（30 ～ 10 kaBP）,the vegetation evolutions were sylvosteppe →grassland →sylvosteppe →grassland.（2） The evolution of Holocene climate has experienced slightly cold and moderately dry（10 ～ 8 kaBP） → warm and humid（8 ～ 3 kaBP） → slightly worm and moderately dry（3 ～ 0 kaBP） process,the vegetation evolutions were sparse sylvosteppe→ sylvosteppe→ sparse sylvosteppe.（3） Occurred in 25 kaBP around,16 kaBP around,and 11-10 kaBP cold events may be Heinrich events 3,1 and Younger Dryas event in eastern China monsoon region＇s response.