Late Lutetian Thermal Maximum—Crossing a Thermal Threshold in Earth's Climate System?

Westerhold T.; R?hl U.; Donner B.; Frederichs T.; Kordesch W. E. C.; Bohaty S. M.; Hodell D. A.; Laskar J.; Zeebe R. E.

摘要

Abstract > Recognizing and deciphering transient global warming events triggered by massive release of carbon into Earth's ocean‐atmosphere climate system in the past are important for understanding climate under elevated pCO <sub>2</sub> conditions. Here we present new high‐resolution geochemical records including benthic foraminiferal stable isotope data with clear evidence of a short‐lived (30 kyr) warming event at 41.52 Ma. The event occurs in the late Lutetian within magnetochron C19r and is characterized by a ～2°C warming of the deep ocean in the southern South Atlantic. The magnitudes of the carbon and oxygen isotope excursions of the Late Lutetian Thermal Maximum are comparable to the H2 event (53.6 Ma) suggesting a similar response of the climate system to carbon cycle perturbations even in an already relatively cooler climate several million years after the Early Eocene Climate Optimum. Coincidence of the event with exceptionally high insolation values in the Northern Hemisphere at 41.52 Ma might indicate that Earth's climate system has a thermal threshold. When this tipping point is crossed, rapid positive feedback mechanisms potentially trigger transient global warming. The orbital configuration in this case could have caused prolonged warm and dry season leading to a massive release of terrestrial carbon into the ocean‐atmosphere system initiating environmental change. </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> > 在过去的地球海洋气氛气候系统中，通过大规模释放碳的碳触发的瞬态全球变暖事件对理解升高的PCO下的气候非常重要 <sub> 2 </ sub> 状况。在这里，我们展示了新的高分辨率地球化学记录，包括底栖多胺定义稳定同位素数据，具有明确的证据表明，在41.52 mA下的短暂寿命（30kyr）变暖事件。该事件发生在磁影C19R的后期卢特，并且其特点是南部大西洋南部深海的〜2°C。晚卢特岛热最大最大值的碳和氧同位素偏移的大小与H2事件（53.6 mA）相当，表明即使在早期几百万年的情况下，即使在已经相对较冷的气候中也在碳循环扰动的情况下，碳循环扰动的类似反应蚕民气候最优。在41.52 mA的北半球北半球在北半球的异常高度呈现的事件的巧合可能表明地球的气候系统具有热阈值。当划线时，快速正反馈机制可能会触发瞬态全球变暖。在这种情况下，轨道配置可能导致长期的温暖和干燥的季节导致陆地碳的大规模释放到海洋气氛系统中启动环境变化。 </ 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>2018年第1期</span><b style="margin: 0 2px;">|</b><span>共10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=Westerhold T.&option=202" target="_blank" rel="nofollow">Westerhold T.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=R?hl U.&option=202" target="_blank" rel="nofollow">R?hl U.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Donner B.&option=202" target="_blank" rel="nofollow">Donner B.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Frederichs T.&option=202" target="_blank" rel="nofollow">Frederichs T.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Kordesch W. E. C.&option=202" target="_blank" rel="nofollow">Kordesch W. E. C.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Bohaty S. M.&option=202" target="_blank" rel="nofollow">Bohaty S. M.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Hodell D. A.&option=202" target="_blank" rel="nofollow">Hodell D. A.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Laskar J.&option=202" target="_blank" rel="nofollow">Laskar J.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Zeebe R. E.&option=202" target="_blank" rel="nofollow">Zeebe R. E.;</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>MARUM – Center for Marine Environmental SciencesUniversity of BremenBremen Germany;</p> <p>MARUM – Center for Marine Environmental SciencesUniversity of BremenBremen Germany;</p> <p>MARUM – Center for Marine Environmental SciencesUniversity of BremenBremen Germany;</p> <p>Faculty of GeosciencesUniversity of BremenBremen Germany;</p> <p>Ocean and Earth ScienceUniversity of Southampton Waterfront Campus National Oceanography CentreSouthampton UK;</p> <p>Ocean and Earth ScienceUniversity of Southampton Waterfront Campus National Oceanography CentreSouthampton UK;</p> <p>Godwin Laboratory for Palaeoclimate Research Department of Earth SciencesUniversity of CambridgeCambridge UK;</p> <p>Astronomie et Systèmes Dynamiques IMCCE‐CNRS UMR8028 Observatoire de ParisUPMCParis France;</p> <p>School of Ocean and Earth Science and TechnologyUniversity of Hawai'i at ManoaHonolulu HI 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=Eocene transient (30 kyr) warming event at 41.52 Ma&option=203" rel="nofollow">Eocene transient (30 kyr) warming event at 41.52 Ma;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Late Lutetian Thermal Maximum (LLTM) occurs within magnetochron C19r&option=203" rel="nofollow">Late Lutetian Thermal Maximum (LLTM) occurs within magnetochron C19r;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=2°C warming of the deep ocean in the southern South Atlantic&option=203" rel="nofollow">2°C warming of the deep ocean in the southern South Atlantic;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=LLTM coincidences with exceptionally high insolation&option=203" rel="nofollow">LLTM coincidences with exceptionally high insolation;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=potential thermal threshold of Earth's climate system&option=203" rel="nofollow">potential thermal threshold of Earth's climate system;</a> </p> <div class="translation"> 机译：yocene瞬态（30 kyr）温暖活动在41.52 ma;晚卢特蒂安热最大（LLTM）在磁影C19R内发生;2°C深海的深海在南部大西洋的深度变暖;LLTM与异常高的倒置;地球的潜在热阈值气候系统; </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/0704023360787.html">Late Lutetian Thermal Maximum—Crossing a Thermal Threshold in Earth's Climate System?</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Westerhold T.&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Westerhold T.,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=R?hl U.&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">R?hl U.,</a> <a 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