Collaborative Research: Modeling and Synthesis Study of a Natural Iron Fertilization site in the Southern Drake Passage

合作研究：德雷克海峡南部天然铁施肥场的建模和综合研究

• 批准号: 0948378
• 负责人: Meng Zhou
• 金额: $ 17.65万
• 依托单位: University of Massachusetts Boston
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-08-01 至 2013-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0948378&HistoricalAwards=false
• 关键词: Collaborative; Research; Modeling; Synthesis; Study

The ocean plays a critical role in sequestering CO2 by exporting fixed carbon to the deep ocean through the biological pump. There is a pressing need to understand the systematics of carbon export in the Southern Ocean in the context of global warming because of the sensitivity of this region to climate change, already manifested as significant temperature increases. Numerous studies have indicated that Fe supply is a primary control on phytoplankton biomass and productivity in the Southern Ocean. The results from previous cruises in Feb-Mar 2004 and Jul-Aug 2006 have revealed the major natural Fe fertilization from Fe-rich shelf waters to the Fe-limited high nutrient low chlorophyll (HNLC) Antarctic Circumpolar Current Surface Water (ASW) in the southern Drake Passage, producing a series of phytoplankton blooms. Remaining questions include: How is natural Fe transported to the euphotic zone through small-meso-large scale horizontal-vertical transport and mixing in different HNLC ACC areas? How does plankton community structure evolve in response to a natural Fe addition, how does Fe speciation respond to biogeochemical processes, and how is Fe recycled to determine the longevity of phytoplankton blooms? How does the export of POC evolve as a function of upwelling-mixing, Fe addition-recycling and bacteria-plankton structure? This synthesis proposal will address these fundamental questions using a unique dataset combining multiyear physical, Fe and biogeochemical data collected between 2004 and 2006 from 2 NSF-funded Fe fertilization experiment cruises and 3 Antarctic Marine Living Resource (AMLR) cruises in the southern Drake Passage and southwestern Scotia Sea through collaboration with scientists in the AMLR program and US Southern Ocean GLOBEC projects. All investigators involved in this study are engaged in graduate and undergraduate instruction, and mentoring of postdoctoral researchers. Each P.I. will incorporate key elements of the proposed syntheses in our lectures, problem sets and group projects. The project includes support to convene a 4-5 day international workshop on natural Fe fertilization at Woods Hole Oceanographic Institution. The workshop will include scientists from United Kingdom, France and Germany who have conducted natural Fe fertilization experiments, and Korea and China who are planning to conduct natural Fe fertilization experiments. The participation of graduate students and postdoctoral scholars will be especially encouraged. The results will be published in a Deep-Sea Research II special issue.

海洋通过生物泵将固定碳出口到深海中，在隔离二氧化碳中起着至关重要的作用。 在全球变暖的背景下，由于该地区对气候变化的敏感性，在全球变暖的背景下，需要了解南洋中碳出口的系统学，这已经表现为温度升高。 许多研究表明，FE供应是对浮游植物生物量和南大洋生产力的主要控制。先前在2004年2月和2006年7月的巡游的结果表明，从富裕的货架水域到Fe限制的高营养高氯植物（HNLC）南极圆形极性电流表极电流地表水（ASW）的主要自然施肥，在南部的Drake Passage中产生了一系列伪造的植物。其余的问题包括：如何通过小型大型大型尺度水平垂直传输和在不同的HNLC ACC区域混合到自然fe？ 浮游生物群落结构如何响应自然的Fe添加，Fe物种形成如何响应生物地球化学过程，以及如何回收Fe回收以确定浮游植物的寿命？ POC的出口如何演变为上升混合，Fe添加回收和细菌 - 浮游生物结构的函数？ 该综合建议将使用独特的数据集解决这些基本问题，该数据集结合了2004年至2006年2006年之间从2个NSF资助的FE受精实验巡航和3个南极海洋生活资源（AMLR）在南部Drake Passage Passage Passage和Southwestern Scotece Seac通过合作的STROCTOR STORTARITS和STORTHR REMAL SOCICALTION与AIN AIN AIN AIN AIN AIN AIN AIN AIN AINS COMPORATION的合作的巡航中收集的多年生理，FE和生物地球化学数据。 参与这项研究的所有研究人员均参与研究生和本科教学，并指导博士后研究人员。 每个P.I.将在我们的讲座，问题集和小组项目中纳入拟议合成的关键要素。 该项目包括支持在伍兹霍尔海洋学机构举行的4-5天国际自然FE受精研讨会。该研讨会将包括从事自然施肥实验的英国，法国和德国的科学家，以及计划进行自然的FE受精实验的韩国和中国。特别鼓励研究生和博士后学者的参与。结果将发表在深海研究II特刊中。