【摘要】 阳原槽村剖面的孢粉分析表明,阳原盆地晚更新世晚期以来的气候环境经历了温凉偏干—温暖稍湿—温凉偏干—冷凉偏干等4个演化阶段,植被亦相应地经历了疏林草原—森林草原—疏林草原—森林草原等4个演化过程。但总的说来,阳原盆地的植被自始至终都是以藜、蒿等草本植物占重要地位,气候总体表现为凉偏干。更多还原

【Abstract】 A sporo-pollen analysis of the Caocun section, Yangyuan, Hebei, shows that the climate and environment since the latest Pleistocene in the Yangyuan basin have gone through four evolutionary stages, i.e. temperate-cool and dry, warm and slightly wet, temperate-cool and dry, and cold and dry, and accordingly vegetation has also gone through four evolutionary stages from sparse sylvosteppe→sylvosteppe→sparse sylvosteppe→sylvosteppe. However, generally the vegetation in the Yangyuan basin has been dominated by herbs, such as Artemisia and Chenopodiaceae, and the paleoclimate has been generally cool-dry.更多还原