地理科学 ›› 1988, Vol. 8 ›› Issue (3): 240-249,295.doi: 10.13249/j.cnki.sgs.1988.03.240

• 论文 • 上一篇    下一篇

三江平原12000年以来植物群发展和气候变化的初步研究

夏玉梅   

  1. 中国科学院长春地理研究所
  • 出版日期:1988-05-20 发布日期:1988-05-20

PRELIMINARY STUDY ON VEGETAIONAL DEVE-LOPMENT AND CLIMATIC CHANGES IN THE SANJIANG PLAIN IN THE LAST 12000 YEARS

Xia Yumei   

  1. Changchun Institute of Geography, Academia Sinica
  • Online:1988-05-20 Published:1988-05-20

摘要: 在三江平原六个泥炭剖面孢粉分析和14C测年数据基础上,提出勤得利和抚远创业泥炭刹面是该区全新世泥炭沉积的标准剖面。划分五个孢粉组合带。12000年以来木本植物群和气候变化经历四个发展阶段,其中8000-5000年是最佳气候期。泥炭发育北部早于南部。

Abstract: Based on the spore-pollen analysis and the 14C dating from 6 peat profiles,the features og plart communities and climatic changes in the last 12000 years are discussed. 12000-9500 B.P.was the period of thin leaf and bush forest,the temperature was 2-3℃ lower than today.,called cool period. 9500-5000 B.P.was the period of temperate broadleaf forest.Meanwhile, during 9500-8000 B.P.Ulmus grew luxuriantly,climate was warm and dry, called the period of increasing temperature.From 8000 to 5000 B.P.Quercus mongolica was much more luxuriantly,temperature was 3-4℃ higher than today. 5000-2500 B.P.was the period of coniferous and broadleaf torest of frigid-temperature zones.About 5000 to 3000 B.P.Abies,Picea and Pinus started to increase suddenly,cold and wet climate commenced.2500 B.P.to present was called the Pinus koraiensis stage,temperature was 1-2℃ lower than today.