【摘 要】
:
Earthquakes play a fundamental role in the evolution of Earth\'s topography through co-seismic uplift and subsidence,as well as erosion through widespread landslides induced by ground motion.Earthquake-induced landslides can result in exceptional increa
【机 构】
:
State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,Chinese Academy
论文部分内容阅读
Earthquakes play a fundamental role in the evolution of Earth\'s topography through co-seismic uplift and subsidence,as well as erosion through widespread landslides induced by ground motion.Earthquake-induced landslides can result in exceptional increases in the transfer of mass from landscapes,supplying sediment to rivers where impacts can last for decades or longer.Landslides can also erode vegetation and soils,in addition to exposing freshly ground rock mass,which can both result in regionally significant carbon transfers.Recent work has sought to quantify the fluxes,rates,and temporal patterns of the impacts on earth surface processes generated by these tectonic events.In this review,we focus on the impacts of earthquake-induced landslides on erosion and sediment flux,river water chemistry,and carbon export through the lens of the well-studied 2008 Wenchuan earthquake.We then discuss these themes in the context of works from the 1999 Taiwan Chi-Chi earthquake,2015 Nepalese Gorkha earthquake,and New Zealand historical earthquakes,altogether highlighting an important role of earthquake-induced landslides in erosion and weathering along tectonically active mountain ranges.We suggest that more monitoring,geochemical tracing,paleo-records,and/or modelling studies are needed to compare the processes and fluxes of catchment erosion and weathering before and after earthquake events,which will help to deepen our understanding not only of the impacts of earthquake-induced landslides on earth surface processes,but also the linkage among high magnitude events,continental erosion and weathering,and the long-term global carbon cycle.
其他文献
Global climate change and increased human consumption have aggravated the uneven spatiotemporal distribution of watershed water resources,affecting the water provision supply and demand state.However,this problem has often been ignored.The present study u
Chemical oxygen demand (COD) is widely used as an organic pollution indicator in wastewater treatment plants.Large amounts of organic matter are removed during treatment processes to meet environmental standards,and consequently,substantial greenhouse gas
Earthquakes are one of the natural disasters that pose a major threat to human lives and property.Earthquake prediction propels the construction and development of modern seismology;however,current deterministic earthquake pre-diction is limited by numero
The late Mesozoic antimony(Sb)mineralization belt in South China hosts a large portion of the world\'s Sb reserves.However,the source and mineralization processes of these Sb deposits remain controversial.Here,we measured mercury(Hg)concentrations and i
跨境电子商务平台上汇集了消费者对商品的“碎片化”需求,具体表现为消费者搜索大量表述各异的关键词.搜索同一个关键词的消费者具有相同的需求从而形成了特定的细分市场,因此本文从依据关键词划分的细分市场角度出发,在价格和评分的基础上引入搜索排名作为电商平台出口影响因素,由于跨境电子商务平台上广泛存在着交叉销售行为,本文还分析了上述影响因素对企业其他商品出口的溢出效应.研究结果表明:商品的排名提升、价格下降和评分提高不仅能增加其细分市场出口量,还能增加企业其他商品的出口量;其中商品排名提升的影响是通过增加商品点击量
本文探讨国际贸易网络对企业出口动态的影响及其作用机制.首先以2000-2016年跨国双边贸易数据为基础构建国别贸易网络指标体系,衡量一国在全球贸易体系中的相对位置,并由此对接中国企业层面出口数据构建企业出口网络指标,再进一步在引力模型中研究企业贸易网络对出口动态的影响.研究发现:将企业贸易网络指标引入到引力模型后,模型对于企业出口动态的解释力更强.企业当期的一阶、二阶和高阶贸易网络指标提高一个单位,会使得企业一市场下期成功出口的概率分别提升4.86%、4.70%和8.93%,出口额分别增加68.55%、6
The Chang\'e-5 mission returned new lunar samples after the last sample mission of the Moon 44 years ago,and is also the first mission that China has completed the sampling of extraterrestrial bodies.Recently,independent teams from the Institute of Geol
The Yellow River Basin(YRB)is characterized by active geological and tectonic processes,rapid geomorphological evolution,and distinct climatic diversity.Correspondingly,major disasters in the YRB are characterized by varied types,extensive distributions,a
Zircon is a common accessory mineral in various rocks,especially in the crustal ones.It is the best mineral for U-Pb dating.Meanwhile,trace elements and isotopes of the mineral can also provide much information concerning the formation and evolution of ro
本文在厘清外资准入政策放松影响企业进口理论机制的基础上,以中国2002年《外商投资产业指导目录》的调整作为一项准自然实验,采用DID模型检验外资准入政策放松对企业进口的影响、作用机制及异质性,并拓展性地检验了外资准入政策放松对进口的政策效果是源于市场准入还是优惠政策,最后进一步考察了制度环境和知识产权保护对其政策效果的调节作用.研究发现:(1)外资准入政策放松显著促进了企业进口;(2)外资准入政策放松主要通过扩大企业生产规模、增加企业融资能力和降低企业生产成本等方面促进企业进口;(3)外资准入政策放松对于