A subsurface depocenter in the South Polar Layered Deposits of Mars

Whitten J. L.; Campbell B. A.; Morgan G. A.

摘要

Abstract >The South Polar Layered Deposits (SPLD) are one of the largest water ice reservoirs on Mars, and their accumulation is driven by variations in the climate primarily controlled by orbital forcings. Patterns of subsurface layering in the SPLD provide important information about past atmospheric dust content, periods of substantial erosion, and variations in local or regional deposition. Here we analyze the SPLD using SHAllow RADar (SHARAD) sounder data to gain a unique perspective on the interior structure of the deposits and to determine what subsurface layers indicate about the preserved climate history. SHARAD data reveal a major deviation from the gently domical layering typical of the SPLD: a subsurface elongate dome. The dome most likely formed due to variations in the accumulation of ice and snow across the cap, with a higher rate occurring in this region over a prolonged period. This SPLD depositional center provides an important marker of south polar climate patterns. </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”> <标题类型=“main”>摘要</ title> >南极分层存款（SPLD）是火星上最大的水冰库之一，其积累由变化驱动在主要由轨道强制控制的气候中。 SPLD中的地下分层模式提供了有关过去大气粉尘含量，实质性侵蚀时期的重要信息，以及局部或区域沉积的变化。在这里，我们使用浅雷达（Sharad）发声器数据分析SPLD，以在存放的内部结构上获得独特的透视图，并确定了哪些地下层指出了保存的气候历史。 Sharad数据揭示了典型的SPLD典型的轻柔分层分层的重大偏差：地下伸长圆顶。圆顶最有可能形成由于帽子上的冰和雪积聚的变化，在该区域在延长时期发生了更高的速率。该SPLD沉积中心提供了南极气候模式的重要标记。</ 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-23539/'>《Geophysical Research Letters》</a> <b style="margin: 0 2px;">|</b><span>2017年第16期</span><b style="margin: 0 2px;">|</b><span>共8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=Whitten J. L.&option=202" target="_blank" rel="nofollow">Whitten J. L.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Campbell B. A.&option=202" target="_blank" rel="nofollow">Campbell B. A.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Morgan G. A.&option=202" target="_blank" rel="nofollow">Morgan G. A.;</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>Smithsonian InstitutionWashington District of Columbia USA;</p> <p>Smithsonian InstitutionWashington District of Columbia USA;</p> <p>Smithsonian InstitutionWashington District of Columbia USA;</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=Mars&option=203" rel="nofollow">Mars;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=South Polar Layered Deposits&option=203" rel="nofollow">South Polar Layered Deposits;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=SHARAD&option=203" rel="nofollow">SHARAD;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=depocenter&option=203" rel="nofollow">depocenter;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Mars Reconnaissance Orbiter&option=203" rel="nofollow">Mars Reconnaissance Orbiter;</a> </p> <div class="translation"> 机译：火星;南极分层沉积物;沙拉德;杂草;火星侦察轨道; </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> <li >中文文献</li> <li >专利</li> </ul> </div> <div class="similarity_details"> <ul > <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/0704019849458.html">A subsurface depocenter in the South Polar Layered Deposits of Mars</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Whitten J. 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