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首页> 外文期刊>Journal of geophysical research. Solid earth: JGR >Distal Enhanced Sedimentation From Volcanic Plumes: Insights From the Secondary Mass Maxima in the 1992 Mount Spurr Fallout Deposits
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Distal Enhanced Sedimentation From Volcanic Plumes: Insights From the Secondary Mass Maxima in the 1992 Mount Spurr Fallout Deposits

机译：来自火山羽毛的远端增强沉降：1992年Mount Spurr Fallout沉积物中的二级质量最大值见识

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Abstract >Some tephra fallout deposits show an increase of mass and thickness at distances from the source 100?km (areas of secondary mass maximum, ASMM) which demonstrates distal enhanced sedimentation from volcanic plumes. We explore development of the ASMMs during the 1992 August and September Mount Spurr eruptions, USA, by combining field data on the spatial distribution of mass and grain size with (1) simulations of individual particle settling through a homogeneous and horizontally stratified atmosphere and (2) mesoscale models of the three‐dimensional wind field that include the effect of the underlying topography. The crosswind and downwind variations of deposit characteristics indicate that the increase of sedimentation at the ASMMs is not formed solely because of preferential settling of small ash particles (125?μm), as commonly assumed in aggregation models. Instead, ASMM grain sizes correspond to the fine modes of the bimodal total grain size distributions. There also appears to be a link between the ASMM and the topography: the mass local minima occur across the windward flank of 2?km high mountain ranges, while the ASMMs spread on the leeward flank. Mesoscale models of the three‐dimensional wind field show vertical oscillations in the wind over mountainous regions which may enhance mechanisms of en masse sedimentation (aggregation, hydrometeor formation, and particle boundary layers), as well as strong spatial variations of the horizontal wind field in the lower troposphere. Our study demonstrates the importance of using grain size, as well as mass, data to constrain the complex processes responsible for particle sedimentation from volcanic plumes. </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><Abstract Type =“main”XML：Lang =“en”> <标题类型=“main”>抽象</ title> >一些Tephar辐射存款显示出距离距离距离的质量和厚度的增加。100 km（二级质量最大，Asmm的区域），其显示来自火山羽毛的远端增强沉降。我们在1992年8月和9月爆发期间探讨了ASMM的发展，通过将现场数据与（1）模拟通过均匀和水平分层的大气和（2 ）三维风场的Messcale模型，包括底层地形的效果。沉积特性的横向和逆风变化表明，由于小灰分颗粒（<125Ωμm）的优先沉降，而不是仅在聚集模型中常见的优先沉积而不是仅形成ASMMS在ASMMS的沉降的增加。相反，ASMM颗粒尺寸对应于双峰总粒度分布的细模式。似乎在ASMM和地形之间存在一个链接：群众局部最小值发生在2个KM高山脉的挡风玻璃上，而ASMM在背风侧面铺展。三维风场的Mescle模型在山区的风中显示出垂直振荡，这可能增强了enmasse沉降机制（聚集，水流仪形成和粒子边界层），以及水平风场的强空间变化较低的对流层。我们的研究表明，使用粒度和质量，数据来限制来自火山羽毛的粒子沉淀的复杂过程的重要性。</ p> </摘要> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-34677/'>《Journal of geophysical research. Solid earth: JGR》</a> <b style="margin: 0 2px;">|</b><span>2017年第10期</span><b style="margin: 0 2px;">|</b><span>共19页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Eychenne Julia&option=202" target="_blank" rel="nofollow">Eychenne Julia;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Rust Alison C.&option=202" target="_blank" rel="nofollow">Rust Alison C.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Cashman Katharine V.&option=202" target="_blank" rel="nofollow">Cashman Katharine V.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Wobrock Wolfram&option=202" target="_blank" rel="nofollow">Wobrock Wolfram;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>Laboratoire Magmas et VolcansUniversité Clermont Auvergne‐CNRS‐IRD OPGCAubière France;</p> <p>School of Earth SciencesUniversity of BristolBristol UK;</p> <p>School of Earth SciencesUniversity of BristolBristol UK;</p> <p>Laboratoire de Météorologie PhysiqueUniversité Clermont Auvergne‐CNRS OPGCAubière France;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/163.html" title="地球物理学">地球物理学;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Volcanic plume&option=203" rel="nofollow">Volcanic plume;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Transport&option=203" rel="nofollow">Transport;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Sedimentation&option=203" rel="nofollow">Sedimentation;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Grain size&option=203" rel="nofollow">Grain size;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Tropographic effect&option=203" rel="nofollow">Tropographic effect;</a> </p> <div class="translation"> 机译：火山羽毛;运输;沉降;晶粒尺寸;对象效应; </div> </li> </ul> </div> </div> <div class="literature cardcommon"> <div class="similarity "> <h3 class="all_title" id="enpatent66">相似文献</h3> <div class="similaritytab clearfix"> <ul> <li class="active" >外文文献</li> </ul> </div> <div class="similarity_details"> <ul > <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/0704020651073.html">Distal Enhanced Sedimentation From Volcanic Plumes: Insights From the Secondary Mass Maxima in the 1992 Mount Spurr Fallout Deposits</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Eychenne Julia&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Eychenne Julia,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Rust Alison C.&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Rust Alison C.,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Cashman Katharine V.&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Cashman Katharine V.,</a> <a href="/journal-foreign-34656/" target="_blank" rel="nofollow" class="tuijian_authcolor">Journal of Geophysical Research. 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