重庆嘉陵江一级阶地孢粉分析及其晚全新世古气候的演变  

SPOROPOLLEN ANALYSIS TO ONE-STEP TERRACE OF THE JIALINGJIANG RIVER IN CHONGQING CITY AND ITS PALAEOCLIMATIC DEVELOPMENT DURING LATE HOLOCENE

作　　者：罗伦德[1] 

机构地区：[1]西南师范大学

出　　处：《海洋地质与第四纪地质》1989年第4期69-85,共17页Marine Geology & Quaternary Geology

摘　　要：作者用常规实验方法和双十编码分类鉴定系统对重庆嘉陵江一级阶地的孢粉分析,配合(14)~C测年,应用数理统计,对晚全新世的古植被和古气候进行探讨.发现该区最近3000多年来,植被演替经历了三个阶段10个发展过程;气候演变有三个阶段,而气温变化有4暖3冷,干湿变化可分5干5湿.作者提出用“气温指数”和“降水指数”的新概念与计算方法,从而定量的研究了孢粉组合反映的各时代年均气温和年均降水量.This paper deals with the sporopollen analysis to the Xiaba terrace——the typical terrace of one step in the east of Sichuan Province, through convention-al experimental method and 'Double-Ten Coding Taxonomy Identifying System'. Then, it goes on the discussion about the palaeoenvironmental development (palaeovegetation and palaeoclimate etc.) in late Holocene in the east of Sichuan Province, using mathematical-statistics method. It is discovered that the vegetation succession has gone through 3 evolutional stages and 10 courses, and the climate development has also gone through 3 stages (Jiangbei Time, Beibei Time and Xiaba Time), but there are 4 warm and 3 cold changes in air temp-erature, and 5 dry and 5 moist ones in air humidity. In this paper, new concepts such as air-temperature index and precipita-tion index, and new mathematical analysis method of palaeoenvironment have been used. Therefore, annual average air temperature and precipitation reflect-ed by sporopollen assemblages in different times have been studied quantitati-vely,

关 键 词：全新世 一级阶地 孢粉分析 气候演变 降水指数 测年 植被演替 孢粉组合 阔叶乔木 干燥气候 

分 类 号：P736[天文地球—海洋地质]