您当前所在位置: 首页 > 学术论坛 > 正文
图片新闻
新闻热点

报告题目:Pastoralism delayed the collapse of the Green Sahara

报告时间:2018年6月26日(周二) 9:30─11:00

报告地点:蒙民伟科技大楼南楼808会议室

主 讲 人:Dr Chris Brierley, UCL Dept. of Geography, University College London

报告时间 2018年6月26日(周二) 9:30─11:00 报告地点 蒙民伟科技大楼南楼808会议室
主 讲 人 Dr Chris Brierley, UCL Dept. of Geography, University College London

讲座简介

During the early Holocene, northern Africa was relatively humid and supported a large human population. Around 5,500 years ago (5.5 ka) the regional climate deteriorated and the population declined substantially. Evidence suggests these changes were coeval, but it is unclear whether or not humans influenced this ecological collapse. Using a climate-vegetation model driven by global forcings, we forecast the length of the Holocene African Humid Period (AHP). The model indicates that the system was most likely to collapse between 7-6 ka, which is at least 500 years before the observed collapse. Archaeological and ethnographic evidence from northern Africa, suggests that the shift from hunter-gatherer to pastoralist societies around 7 ka was an effective adaptation to the orbitally-driven regional environmental changes. The pastoralist strategy may even have slowed the deterioration caused by orbital driven climate change. This supports the view that modern pastoralists are beneficial for the management of the world’s dryland environments.

主讲人简介

I am interested in how the climate evolved in the past and will do so going into the future. Like the climate, my career path has steadily evolved since its start in physics (BSc, Durham, 2002). I then studied coupled climate modelling (PhD in Meteorology, University of Reading, 2007), which combines physical oceanography with atmospheric physics. A post-doc in the Geology & Geophysics department at Yale exposed me to the true scale of Earth history. I am especially in how we can use studies of past climate variability to quantify the uncertainty in future projections.

上一篇:全球变化科学紫荆论坛第254期

下一篇:全球变化科学紫荆论坛第252期