| 中-晚全新世以来安固里淖气候演变的植硅体记录 |
| |
| 引用本文： | 刘林敬,李长安,介冬梅,张茹春,王江永,张玉芬,毛欣,姜高磊,王盼丽.中-晚全新世以来安固里淖气候演变的植硅体记录[J].地球科学,2018,43(11):4138-4148. |
| |
| 作者姓名： | 刘林敬 李长安 介冬梅 张茹春 王江永 张玉芬 毛欣 姜高磊 王盼丽 |
| |
| 作者单位： | 1.中国地质大学地球科学学院, 湖北武汉 430074 |
| |
| 基金项目： | 国家自然科学基金项目41471164国家自然科学基金项目41602194国家自然科学基金项目41672355 |
| |
| 摘 要： | 河北坝上地区位于东亚季风边缘区和农牧交错带，季风强弱的变化深刻影响着该地区人类文明的发展.为了重建河北坝上地区中-晚全新世以来的气候演化过程，剖析气候变化与人类文明发展的关系，以坝上地区安固里淖湖为研究对象，通过对该湖沉积剖面植硅体的分析，并结合孢粉组合特征，恢复了安固里淖地区5 000 cal.a BP以来的气候演变历史.结果显示，在千年尺度上该区域气候总体呈冷干趋势，但在5 030~3 070 cal.a BP时期气候相对湿润，千年尺度上气候的变化主要受控于北半球太阳辐射量的变化.在百年尺度上安固里淖地区经历了7次冷干事件，分别发生于4 500 cal.a BP、4 100~3 800 cal.a BP、3 500 cal.a BP、3 000 cal.a BP、2 100 cal.a BP、1 100 cal.a BP和800~270 cal.a BP左右，这7次冷干事件对应于东亚季风减弱阶段，主要受到了北半球高纬气候和太阳活动的共同影响.该区人类文明的演化敏感响应于气候变化，气候温湿期以农业文明为主，气候冷干期以草原文明为主.
|
| 关 键 词： | 河北坝上 安固里淖 植硅体 孢粉 中-晚全新世 聚类分析 气候演变 |
| 收稿时间： | 2018-04-17 |
Paleoclimate Recorded by Phytolith in Anguli-Nuur Lake since Mid-Late Holocene |
| |
| Abstract: | Bashang area of Hebei Province is located in the East Asian monsoon-margin region and the ecotone between agriculture and animal husbandry. East Asian monsoon variability significantly affects the development of human civilization within its area of influence. In order to reconstruct the climate changes in Bashang area and understand the interactions between past climate and human civilization, a continuous 120 cm sediment profile was recovered from Anguli-Nuur Lake based on phytolith and pollen analysis. The results show that the climate in this region was gradually becoming cold and dry during the last 5 000 years, which is related to the weakening of East Asian monsoon produced by gradual variations of solar radiation. However, the climate was relatively wet during the periods of 5 030-3 074 cal. a BP. On the centennial scale, Anguli-Nuur has experienced seven obvious cold and dry events, which occurred during ~4 500 cal. a BP, 4 100-3 800 cal. a BP, ~3 500 cal. a BP, ~3 000 cal. a BP, ~2 100 cal. a BP, ~1 100 cal. a BP and 800-270 cal. a BP. The cold and dry events are consistent with the weakening stage of East Asian monsoon that is probably affected by high latitude climate and the solar activities. In this region, the development of human civilization is sensitive to climate change. Agriculture civilization is relatively developed during warm and humid stage, and grassland civilization appears during cool and arid stage. |
| |
| Keywords: | |
|
| 点击此处可从《地球科学》浏览原始摘要信息 |
|
点击此处可从《地球科学》下载全文 |
|
