齐惠慧^1,,
刘兴起^1,,,
李华淑¹,
李峻峰¹,
曹现勇^2,3,
UlrikeHerzschuh³
1. 首都师范大学资源环境与旅游学院, 北京 100048
2. 中国科学院青藏高原研究所, 北京 100101
3. Polar Terrestrial Environmental Systems, Alfred Wegener Institute for Polar and Marine Research in the Helmholtz Association, Telegraphenberg A43, 14473 Potsdam, Germany

基金项目: 国家自然科学基金面上项目（批准号：41372176）资助


详细信息

作者简介: 齐惠慧, 女, 23岁, 硕士研究生, 自然地理学专业, E-mail:1581633637@qq.com

通讯作者: 刘兴起, Email:xqliu@cnu.edu.cn

中图分类号: Q913.84;P941.78;P532

收稿日期:2018-03-12
修回日期:2018-06-10
刊出日期:2018-09-30

The vegetation and climate changes since the late glacial period inferred from pollen record of a sediment core in Anguli-Nuur Lake, Hebei Province

Qi Huihui^1,,
Liu Xingqi^1,,,
Li Huashu¹,
Li Junfeng¹,
Cao Xianyong^2,3,
Ulrike Herzschuh³
1. College of Resource Environment and Tourism, Capital Normal University, Beijing 100048
2. Institue of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101
3. Polar Terrestrial Environmental Systems, Alfred Wegener Institute for Polar and Marine Research in the Helmholtz Association, Telegraphenberg A43, 14473 Potsdam, Germany


More Information

Corresponding author: Liu Xingqi,E-mail:xqliu@cnu.edu.cn

MSC: Q913.84;P941.78;P532

--> Received Date: 12 March 2018
Revised Date: 10 June 2018
Publish Date: 30 September 2018


摘要
摘要:河北安固里淖地处东南季风的边缘地区，是研究古气候环境演化的理想地区之一。文章以安固里淖的沉积岩芯（长18.4 m）为研究对象，利用AMS ¹⁴C测年和孢粉数据，重建了安固里淖湖区14.3 cal.ka B.P.以来的植被与气候演化历史。结果表明：14.3~11.0 cal.ka B.P.期间，湖区以疏林草原植被为主，气候偏干；11.0~6.0 cal.ka B.P.以森林草原植被为主，气候湿润；6.0~3.2 cal.ka B.P.以疏林草原植被为主，气候偏湿；3.2~0 cal.ka B.P.以荒漠草原植被为主，气候干旱。总体而言，自晚冰期以来安固里淖的气候经历了由干变湿再逐渐变干的过程，全新世适宜期出现在早中全新世。通过区域对比发现，安固里淖揭示的晚冰期以来东南季风的气候演化特征与西南季风的演化具有很大的相似性，表明晚冰期以来东南季风与西南季风在轨道尺度上的演化并无太大差异，太阳辐射是二者演化的共同驱动力。
关键词: 安固里淖/
孢粉/
晚冰期/
环境变化/
东南季风

Abstract:Located in the marginal area of southeast monsoon, the Anguli-Nuur Lake is sensitive to respond to climate, so it is one of the ideal regions to study the evolution of paleoclimate and paleoenvironment. A 38-m-long drilling core were obtained from the center of Anguli-Nuur Lake(41°20'44"N, 114°22'40"E; 1301.5 m a.s.l.). In this paper, we used the upper 18.4 m sediment core. 256 subsamples were collected for pollen analysis. The chronology was based on AMS ¹⁴C dating on bulk organic carbon of 3 samples, charcoal of 6 samples, and plant material of 2 samples. The age at the bottom of the core is 14.3 cal.ka B.P. All fossil pollen spectra show high frequencies of Artemisia, and Chenopodiaceae which sum up to more than 50% in most samples. Tree pollen taxa are dominated by Pinus, but its percentage is mostly less than 30%. Based on AMS ¹⁴C dating and pollen data, we reconstructed the vegetation and climate evolution since the Late Glacial period. The main vegetation was steppe with sparse forest between 14.3 cal.ka B.P. and 11.0 cal.ka B.P., indicating a dry climate. The vegetation shifted to forest steppe from 11.0 cal.ka B.P. to 6.0 cal.ka B.P., and the climate was humid. During 6.0~3.2 cal.ka B.P., Anguli-Nuur Lake area was dominated by sparse forest steppe again, but the climate was a little wet. The vegetation was characterized by desert steppe and the climate was dry between 3.2~0 cal.ka B.P. Generally speaking, the climate has experienced a dry to wet during the late glacial to Early-Middle Holocene and then gradually become dry process after Middle Holocene, and the Holocene climatic optimum culminated was found in the early and Middle Holocene. Comparisons with other records indicate that the climatic evolution of southeast monsoon region revealed by Anguli-Nuur Lake is quite similar to the evolution of the Southwest monsoon at orbital timescale since the Late Glacial period. The Northern Hemisphere summer insolation probably is the main driving force for the evolution of southeast and southwest monsoon.
Key words:Anguli-Nuur Lake/
pollen/
late glacial/
climate change/
southeast monsoon



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