神农架大九湖晚更新世与全新世之交的气候变化——来自孢粉的信息

Climate Changes in Interim of Late Pleistocene and Holocene in Dajiuhu Basin of Shennongjia,Hubei Province:Evidence from Pollen

对神农架大九湖泥炭地层进行了孢粉分析,建立了晚更新世与全新世之交（14031-9625 aBP）高分辨率的孢粉组合带。根据孢粉植被反映的气候信息推断大九湖地区在晚更新世与全新世之交的气候大致以冷湿为特点,同时气候变化剧烈,表现为冷暖干湿波动频繁,可划分为3个气候旋回：第一旋回（14031-12581 aBP）气候变化经历了由温凉偏干—温凉湿润—温暖偏干的过程;第二旋回（12581-11046 aBP）气候变化经历了由寒冷偏干—温凉湿润—温凉偏干的过程;第三旋回（11406-9625aBP）气候变化经历了由温凉偏干-寒冷湿润-温凉偏干的过程。

The interim of Irate Pleistocene and Holocene is a very important epoch, but the research of the climate change in this period is not well reported. A DZK3 peat core was obtained from the Dajiuhu Basin of Shennongjia, Hubei Province,China, and then 128 pollen types were identified from 156 samples taken at 1 cm intervals and 10 spore-pollen zones of the epoch （14 031--9 625 aBP） are distinguished from the core. Thus, the 10 spore-pollen zones of this epoch are divided into 3 gyrations. In every gyration the vegetation evolution changes orderly. The study reflects that the temperature and humidity fluctuated high frequenctly in the interim of Late Pleistocene and Holoeene.