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Climate and human battle for dominance over the Yellow River's sediment discharge: From the Mid-Holocene to the Anthropocene
Marine Geology ( IF 2.9 ) Pub Date : 2020-04-06 , DOI: 10.1016/j.margeo.2020.106188
Xiao Wu , Houjie Wang , Naishuang Bi , Yoshiki Saito , Jingping Xu , Yong Zhang , Taian Lu , Shuai Cong , Zuosheng Yang

Understanding the flux of riverine sediment is crucial not only to document the global terrestrial material budget but also to understand erosion patterns within the drainage basin under the impact of natural and anthropogenic forces. Here we reconstructed changes of sediment discharge in the Yellow River over the last 7000 years based on a large number of 14C dates obtained from literature and discussed the impact of climate change and human activities from the mid-Holocene to the Anthropocene. From 7000 to about 3000 cal yr BP, the Yellow River's sediment discharge was lower than 0.09 gigatonnes per year (Gt/yr). Due to low population and limited ability to conquer nature, climatic conditions almost completely controlled the sediment discharge over this period. After 3000 cal yr BP, the sediment discharge increased gently to 0.23 Gt/yr at 1400 cal yr BP. Since then, the sediment discharge increased abruptly to 1.56 Gt/yr in 1855 CE and subsequently remained at a fairly high level of 1.31 Gt/yr with fluctuations for nearly a century. Human activities gradually enhanced the increasing trend of sediment discharge and began to affect the environment at a scale comparable with powerful natural forcing due to population growth and technique innovation. Since the late 1950s, the terrestrial sediment from the Yellow River to the sea has experienced a cliff-like drop, which appears to be reverting to the pristine levels of the middle Holocene. With the explosive growth of the population, technological innovation and economic development, human activities in the drainage basin intensified continuously and greatly regulated the water and land resources.



中文翻译:

气候和人类争夺黄河沉积物的主导地位:从中全新世到人类世

了解河流沉积物的流量不仅对记录全球陆地物质预算至关重要,而且对于了解自然和人为力量的影响下流域内的侵蚀方式都至关重要。在这里,我们根据大量的14个数据,重构了过去7000年黄河的泥沙流量变化C日期从文献中获得,讨论了从全新世中期到人类世的气候变化和人类活动的影响。从7000 BP到大约3000 cal yr BP,黄河的沉积物排放量每年低于0.09千兆吨(Gt / yr)。由于人口少和征服自然的能力有限,在此期间,气候条件几乎完全控制了沉积物的排放。在3000 cal yr BP之后,在1400 cal yr BP处,沉积物排放量缓慢增加到0.23 Gt / yr。此后,沉积物排放量在公元1855年突然增加到1.56 Gt /年,随后在近一个世纪的时间里一直保持在1.31 Gt /年的较高水平。由于人口增长和技术创新,人类活动逐渐增强了泥沙排放的增加趋势,并开始以与强大的自然强迫相当的规模影响环境。自1950年代后期以来,从黄河到海洋的陆地沉积物经历了悬崖状的下降,似乎正在恢复到全新世中期的原始水平。随着人口的爆炸性增长,技术创新和经济发展,流域的人类活动不断加剧,极大地调节了水土资源。似乎恢复到中全新世的原始水平。随着人口的爆炸性增长,技术创新和经济发展,流域的人类活动不断加剧,极大地调节了水土资源。似乎恢复到中全新世的原始水平。随着人口的爆炸性增长,技术创新和经济发展,流域的人类活动不断加剧,极大地调节了水土资源。

更新日期:2020-04-06
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