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The role of sea ice in the Southern Ocean carbon sink using novel biogeochemical sensors

使用新型生物地球化学传感器研究海冰在南大洋碳汇中的作用

基本信息

批准号：
2086455
负责人：
金额：
--
依托单位：
University of East Anglia
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2018
资助国家：
英国
起止时间：
2018 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2086455
关键词：
role sea ice Southern Ocean

项目摘要

This PhD project has these objectives:1. To quantify ocean CO2 uptake during the pre-conditioning and formation of Antarctic Bottom Water. 2. To determine seasonal and year-to-year variation in the CO2 sink and their drivers in seasonally ice covered waters. The PhD student will investigate the interplay between sea ice dynamics and ocean CO2 uptake, while using biogeochemical sensor data and conventional chemical analyses. Specifically the PhD student will deploy biogeochemical floats and sample for carbonate chemistry at ~58-60 degrees S, 6 degrees W-9 degrees E in the Weddell Sea on the ice breaker R.V. Polarstern cruise PS117 (December 2018- February 2019), as part of PICCOLO. The PhD student will carry out carbonate chemistry analyses on the Polarstern and RaTS samples. The student will evaluate the measurements by sensors for pH, oxygen and chlorophyll fluorescence against new (PS117, PICCOLO, ORCHESTRA) and historic shipboard measurements (GLODAPv2, SOCAT), following approaches developed at by the PhD supervisors (Dall'Olmo et al., 2016), in SOCCOM, and elsewhere. Winter Water, a winter mixed layer remnant below the summer mixed layer, will further inform on wintertime processes. Geometric vector analysis will enable quantification of the processes affecting carbonate chemistry in PICCOLO and at RaTS (Legge et al., 2017).The student will carry out research and training at UEA (38 months), PML (2 months) and at sea (2 months). Training in scientific, transferable and advanced research skills will include safe working practice, seagoing research, novel sensors, chemistry measurements and data analysis. Participation in a research cruise, subject to a successful medical and sea survival training, will strengthen personal skills. The student will present the scientific findings in research colloquia, at (inter-)national conferences, in peer-reviewed publications and a PhD thesis. The research training will address strategic UK skills gaps in numerical skills, computing, statistics, fieldwork and laboratory skills. The first-rate training and the cutting-edge research will equip the student for a career across a range of professions. The student will have weekly meetings with the 'local' supervisor(s), as well as monthly (virtual) meetings with all supervisors. Three formal progress meetings per year will be at UEA and BAS. Dr Dorothee Bakker (UEA) is a Co-I on PICCOLO and leads the international Surface Ocean CO2 Atlas (SOCAT) synthesis activity. Dr Martin Johnson (UEA) is Director of the Marine Knowledge and Exchange Network (M-KEN). Dr Giorgio Dall'Olmo (PML) is the lead for biogeochemical floats in PICCOLO. Dr Hugh Venables (BAS) leads the RaTS sampling programme. Dr Bastien Queste (UEA) is an expert in biogeochemical glider data. Dr Mario Hoppema (AWI) is an expert on Weddell Sea carbonate chemistry, a member of the GLODAP reference group and is a project partner in PICCOLO. The supervisory team has expertise in the collection, interpretation, modelling and presentation of marine biogeochemical data in the Southern Ocean and elsewhere.

本博士项目有以下目标：1.量化南极底层水预调节和形成过程中的海洋二氧化碳吸收。2.确定季节性结冰水域中二氧化碳汇的季节和年际变化及其驱动因素。这位博士生将利用生物地球化学传感器数据和常规化学分析，研究海冰动力学和海洋二氧化碳吸收之间的相互作用。具体地说，这名博士生将在威德尔海的维德尔海，在破冰船PS117(2018年12月至2019年2月)上部署生物地球化学浮标和碳酸盐化学样品，作为短笛的一部分。这位博士生将对Polarstein和老鼠样本进行碳酸盐化学分析。学生将按照博士导师(Dall‘Olmo等人，2016)、SOCCOM和其他地方开发的方法，对照新的(PS117、Piccolo、管弦乐队)和历史上的船上测量(GLODAPv2、SOCAT)来评估传感器对pH、氧气和叶绿素荧光的测量。冬季水，夏季混合层下方的冬季混合层残留物，将进一步说明冬季的过程。几何向量分析将能够量化影响短笛短笛和大鼠碳酸盐化学的过程(Legge等人，2017年)。学生将在UEA(38个月)、PML(2个月)和海上(2个月)进行研究和培训。科学、可转让和高级研究技能方面的培训将包括安全工作实践、海洋研究、新型传感器、化学测量和数据分析。参加一次研究巡航，经过一次成功的医学和海上生存训练，将加强个人技能。学生将在研究座谈会、国际会议、同行评议出版物和博士论文中陈述科学发现。研究培训将解决英国在数值技能、计算、统计、实地考察和实验室技能方面的战略性技能差距。一流的培训和尖端的研究将为学生在一系列专业领域的职业生涯做好准备。学生将每周与当地主管(S)会面，每月与所有主管(虚拟)会面。UEA和BAS每年将举行三次正式进展会议。DorotheBakker博士(UEA)是Piccolo上的合作伙伴，领导着国际表层海洋二氧化碳地图集(SOCAT)的合成活动。马丁·约翰逊博士(UEA)是海洋知识和交流网络(M-KEN)的主任。Giorgio Dall‘Olmo博士(PML)是短笛短笛生物地球化学漂浮物的负责人。休·维纳布尔斯博士(BAS)领导了老鼠抽样计划。巴斯蒂安·奎斯特博士(UEA)是滑翔机生物地球化学数据方面的专家。Mario Hoppema博士(AWI)是韦德尔海碳酸盐化学方面的专家，GLODAP参考小组的成员，也是Piccolo的项目合作伙伴。监督小组在收集、解释、模拟和介绍南大洋和其他地方的海洋生物地球化学数据方面拥有专门知识。