Modeling the Seasonal Cycle of Iron and Carbon Fluxes in the Amundsen Sea Polynya, Antarctica

St‐Laurent P.; Yager P. L.; Sherrell R. M.; Oliver H.; Dinniman M. S.; Stammerjohn S. E.

摘要

Abstract >The Amundsen Sea Polynya (ASP) is distinguished by having the highest net primary production per unit area in the coastal Antarctic. Recent studies have related this high productivity to the presence of fast‐melting ice shelves, but the mechanisms involved are not well understood. In this study we describe the first numerical model of the ASP to represent explicitly the ocean‐ice interactions, nitrogen and iron cycles, and the coastal circulation at high resolution. The study focuses on the seasonal cycle of iron and carbon, and the results are broadly consistent with field observations collected during the summer of 2010–2011. The simulated biogeochemical cycle is strongly controlled by light availability(dictated by sea ice, phytoplankton self‐shading, and variable sunlight). The micronutrient iron exhibits strong seasonality, where scavenging by biogenic particles and remineralization play large compensating roles. Lateral fluxes of iron are also important to the iron budget, and our results confirm the key role played by inputs of dissolved iron from the buoyancy‐driven circulation of melting ice shelf cavities (the “meltwater pump”). The model suggests that westward flowing coastal circulation plays two important roles: it provides additional iron to the ASP and it collects particulate organic matter generated by the bloom and transports it to the west of the ASP. As a result, maps of vertical particulate organic matter fluxes show highest fluxes in shelf regions located west of the productive central ASP. Overall, these model results improve our mechanistic understanding of the ASP bloom, while suggesting testable hypotheses for future field efforts. </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”XML：ID =“JGRC23350-Abs-Abs-0001”> <标题类型=“main”>抽象</ title> > Amundsen Sea Polynya（ASP）是通过在沿海南极的每单位面积获得最高的净初级生产。最近的研究与快速熔化的冰架的存在相关，但涉及的机制也不太了解。在这项研究中，我们描述了ASP的第一个数值模型，以明确表示海冰相互作用，氮气和铁循环，以及高分辨率的沿海循环。该研究侧重于铁和碳的季节性循环，结果与2010-2011夏季收集的现场观察结果广泛一致。模拟的生物地球化学循环强烈通过光可用性（由海冰，浮游植物自漆和可变阳光决定）。微量营养素铁呈现出强烈的季节性，其中生物颗粒和再矿化的清除起来起着大的补偿作用。铁的横向助焊剂对铁预算也很重要，我们的结果证实了来自熔化冰搁架空腔的浮动驱动循环的溶解铁的输入所发挥的关键作用（“Meltwater泵”）。该模型表明，向西流动的沿海循环发挥了两个重要的作用：它为ASP提供了额外的铁，它收集盛开产生的微粒有机物质并将其运送到ASP的西部。结果，垂直颗粒有机物质通量的图显示了位于生产中央ASP以西的架子区域中的最高助熔剂。总体而言，这些模型结果改善了对asp绽放的机制理解，同时建议未来的假设用于将来的现场努力。</ 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-34643/'>《Journal of Geophysical Research, C. Oceans: JGR》</a> <b style="margin: 0 2px;">|</b><span>2019年第3期</span><b style="margin: 0 2px;">|</b><span>共22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=St‐Laurent P.&option=202" target="_blank" rel="nofollow">St‐Laurent P.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Yager P. L.&option=202" target="_blank" rel="nofollow">Yager P. L.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Sherrell R. M.&option=202" target="_blank" rel="nofollow">Sherrell R. M.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Oliver H.&option=202" target="_blank" rel="nofollow">Oliver H.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Dinniman M. S.&option=202" target="_blank" rel="nofollow">Dinniman M. S.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Stammerjohn S. E.&option=202" target="_blank" rel="nofollow">Stammerjohn S. 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>Center for Coastal Physical OceanographyOld Dominion UniversityNorfolk VA USA;</p> <p>Department of Marine SciencesUniversity of GeorgiaAthens GA USA;</p> <p>Department of Marine and Coastal SciencesRutgers State University of New JerseyNew Brunswick NJ USA;</p> <p>Department of Marine SciencesUniversity of GeorgiaAthens GA USA;</p> <p>Center for Coastal Physical OceanographyOld Dominion UniversityNorfolk VA USA;</p> <p>Institute of Arctic and Alpine ResearchUniversity of Colorado BoulderBoulder CO 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=polynyas&option=203" rel="nofollow">polynyas;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Antarctica&option=203" rel="nofollow">Antarctica;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=ice shelves&option=203" rel="nofollow">ice shelves;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=phytoplankton&option=203" rel="nofollow">phytoplankton;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=sea ice&option=203" rel="nofollow">sea ice;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=oceanography&option=203" rel="nofollow">oceanography;</a> </p> <div class="translation"> 机译：Polynyas;南极洲;冰架;浮游植物;海冰;海洋学; </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/0704025579502.html">Modeling the Seasonal Cycle of Iron and Carbon Fluxes in the Amundsen Sea Polynya, Antarctica</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=St‐Laurent P.&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">St‐Laurent P.,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Yager P. 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