西北内陆高台盐池孢粉组合与古气候变化  

Characteristics of spore-pollen and ancient climate changes in inlands of Northwest China

作　　者：申建梅[1] 张光辉[1] 聂振龙[1] 王金哲[1] 严明疆[1] 张俊牌[1] 郭瑞林[2] 

机构地区：[1]中国地质科学院水文地质环境地质研究所,石家庄050061 [2]河北省地勘局第四地质大队,承德067000

出　　处：《中国生态农业学报》2008年第2期323-326,共4页Chinese Journal of Eco-Agriculture

基　　金：国家重点基础研究(973)发展计划项目(2006CB403401);国家自然基金项目(40472126)资助

摘　　要：通过甘肃盐池盐矿地层剖面早更新世～全新世孢粉分析，将更新世以来的孢粉划分为4个组合带。根据孢粉组合特征，探讨了盐池矿区近1．6万年由荒漠草原-疏林草原-灌丛荒漠草原的古植被演替与冷干-暖湿-冷干的古气候演变特征，揭示了该地区湖泊趋于干涸，浅层地下水成化，向干旱化发展的气候因素，这对西北内陆水资源和生态环境变化研究具有重要意义。Spore-pollen analysis of Pleistocene--Holocene in Yanchi diggings of Gansu shows that the oldest profile is 12.5 16.0ka. Based on spore-pollen characteristics, 27 families and genus are found along the profiles, 10 of which are xylophytes, 15 are herbs, and 2 are pteridophytes. The Pleistocene-Holocene spore-pollen is divided into four composition categories. The spore-pollen composition shows that paleoclimatic evolution features are from cold-dry to warm-wet and to cold-dry again, and paleobotanic alternation is from desert grassland to spare-tree grassland and to frutex-desert grassland in 1.6 Ma. The composition reveals drying local lakes, salting shallow groundwaters and increasing arid climate. These are vital clues to variations in water resources and ecological environments in the inlands of Northwest China.

关 键 词：西北内陆 盐池 孢粉组合 古气候 古植被 

分 类 号：P46[天文地球—大气科学及气象学] Q944.571[生物学—植物学]