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A Reassessment of the Precision of Carbonate Clumped Isotope Measurements: Implications for Calibrations and Paleoclimate Reconstructions

机译：重新评估碳酸块块同位素测量的精度：对校准和古气候重建的影响

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Abstract > Carbonate clumped isotopes offer a potentially transformational tool to interpret Earth's history, but the proxy is still limited by poor interlaboratory reproducibility. Here, we focus on the uncertainties that result from the analysis of only a few replicate measurements to understand the extent to which unconstrained errors affect calibration relationships and paleoclimate reconstructions. We find that highly precise data can be routinely obtained with multiple replicate analyses, but this is not always done in many laboratories. For instance, using published estimates of external reproducibilities we find that typical clumped isotope measurements (three replicate analyses) have margins of error at the 95% confidence level (CL) that are too large for many applications. These errors, however, can be systematically reduced with more replicate measurements. Second, using a Monte Carlo‐type simulation we demonstrate that the degree of disagreement on published calibration slopes is about what we should expect considering the precision of Δ <sub>47</sub> data, the number of samples and replicate analyses, and the temperature range covered in published calibrations. Finally, we show that the way errors are typically reported in clumped isotope data can be problematic and lead to the impression that data are more precise than warranted. We recommend that uncertainties in Δ <sub>47</sub> data should no longer be reported as the standard error of a few replicate measurements. Instead, uncertainties should be reported as margins of error at a specified confidence level (e.g., 68% or 95% CL). These error bars are a more realistic indication of the reliability of a measurement. </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”>抽象</ title> > 碳酸块块状同位素提供了一个潜在的变革工具来解释地球的历史，但代理仍然受到差的互上的再现性的限制。在这里，我们专注于分析少数重复测量来实现的不确定性，以了解无约束错误影响校准关系和古气候重建的程度。我们发现，通过多个重复分析可以常规地获得高精度数据，但这并不总是在许多实验室中完成。例如，使用发布的外部再现估计，我们发现典型的Clumped同位素测量（三个复制分析）在95％置信水平（CL）对于许多应用程序过大的95％置信水平（CL）中具有误差。然而，可以通过更多复制的测量系统地减少这些错误。其次，使用Monte Carlo型模拟，我们证明了发表校准斜坡上的分歧程度是关于我们应该期望的考虑δ的精确度 <sub> 47 </ sub> 数据，样本数量和复制分析，以及发布校准中涵盖的温度范围。最后，我们表明误差通常以集成的同位素数据报告可能是有问题的并且导致数据更精确的印象比保证更精确。我们建议在δ中的不确定性 <sub> 47 </ sub> 不再将数据报告为几种复制测量的标准错误。相反，应在特定置信水平（例如68％或95％CL）上报告不确定因素作为错误的误差。这些误差栏是测量可靠性的更现实的指示。 </ 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-23285/'>《Geochemistry, geophysics, geosystems》</a> <b style="margin: 0 2px;">|</b><span>2017年第12期</span><b style="margin: 0 2px;">|</b><span>共12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=Fernandez Alvaro&option=202" target="_blank" rel="nofollow">Fernandez Alvaro;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Müller Inigo A.&option=202" target="_blank" rel="nofollow">Müller Inigo A.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Rodríguez‐Sanz Laura&option=202" target="_blank" rel="nofollow">Rodríguez‐Sanz Laura;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=van Dijk Joep&option=202" target="_blank" rel="nofollow">van Dijk Joep;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Looser Nathan&option=202" target="_blank" rel="nofollow">Looser Nathan;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Bernasconi Stefano M.&option=202" target="_blank" rel="nofollow">Bernasconi Stefano M.;</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>Geological Institute ETH ZürichZürich Switzerland;</p> <p>Geological Institute ETH ZürichZürich Switzerland;</p> <p>Research School of Earth SciencesThe Australian National UniversityCanberra ACT Australia;</p> <p>Geological Institute ETH ZürichZürich Switzerland;</p> <p>Geological Institute ETH ZürichZürich Switzerland;</p> <p>Geological Institute ETH ZürichZürich Switzerland;</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=clumped isotopes&option=203" rel="nofollow">clumped isotopes;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=carbonates&option=203" rel="nofollow">carbonates;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=paleotemperature&option=203" rel="nofollow">paleotemperature;</a> </p> <div class="translation"> 机译：丛生同位素;碳酸盐;古温度; </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/0704023360431.html">A Reassessment of the Precision of Carbonate Clumped Isotope Measurements: Implications for Calibrations and Paleoclimate Reconstructions</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Fernandez Alvaro&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Fernandez Alvaro,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Müller Inigo 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