CAREER: The Impact of Hydrologic State on CO2 Flux and Acidification in Subtropical Estuaries

职业：水文状态对亚热带河口二氧化碳通量和酸化的影响

• 批准号: 1654232
• 负责人: Xinping Hu
• 金额: $ 45.97万
• 依托单位: Texas A&M University Corpus Christi
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-05-01 至 2023-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1654232&HistoricalAwards=false
• 关键词: CAREER; Impact; Hydrologic; State; CO2

This project is a CAREER award to Xinping Hu at Texas A&M University-Corpus Christi. Hu proposes to integrate research and education in an investigation of carbon cycling and ocean acidification in the Mission-Aransas Estuary in South Texas. This coastal system is strongly affected by changes in river flow between seasons and from year to year. The relationship of changing river flows to carbon cycling in estuaries is not well understood. This lack of understanding in turn contributes to uncertainty in estimating global estuarine carbon budgets. In addition, climate change and other human activities heavily influence riverine input into estuaries and the coastal ocean, which then affect biogeochemistry and metabolism in these environments. Despite the need for this information, long-term records that can help to address the change in the strength and directions of CO2 fluxes in these ecosystems are very rare. Using high-intensity field sampling and analysis of historical data, this project aims to improve understanding of carbon cycling in this estuary and in the coastal ocean in general. The results obtained from this study will also provide key information about the biogeochemical response of estuaries to changing hydrologic conditions, as the southwestern U.S. grows drier with overall declining precipitation.The research objectives of this project include 1) investigating the relationship between hydrologic state and estuarine CO2 partial pressure (pCO2) in a case study of the Mission-Aransas Estuary, a subtropical semiarid estuary, 2) understanding the extent of CO2 flux and its hydrologic control in one of the world's largest lagoonal estuarine systems along the northwestern Gulf of Mexico, and 3) elucidating the mechanisms that lead to estuarine acidification and its feedback to CO2 fluxes. Intensive field campaigns for high-temporal resolution pCO2 and water carbonate chemistry sampling as well as sediment incubation will be carried out; analysis of multidecadal carbonate chemistry parameters that have been collected by Texas Commission on Environmental Quality will be used to obtain temporal trends of estuarine water pCO2 against the backdrop of increasing freshwater scarcity in this region. The education component of this CAREER award includes 1) creating an ocean and estuarine acidification research course and redesigning two existing courses for both undergraduate and graduate students, 2) collaborating with Foy Moody High School on their Aquatic Science education to engage high school students predominantly from underrepresented and economically challenged backgrounds in field and lab experiences. The ultimate educational goal is to encourage high school students to follow a STEM path for their college education, and undergraduate STEM students to pursue graduate degrees. This will be a part of the concerted effort to enhance diversity in the future workforce by increasing the number of underrepresented graduates with bachelor's or higher degrees in the STEM fields. This project will train one Ph.D. student. High school students and undergraduate interns from underrepresented and economically challenged backgrounds will also be supported to participate in summer research. Broader dissemination of the project findings will include undergraduate student presentations at symposiums organized by both TAMU-CC and the Texas A&M University System, public seminars by both the graduate students and the principal investigator at various meetings organized by regional estuarine programs, presentations at national and international meetings, and publications in peer-reviewed journals.

该项目是德克萨斯农工大学科珀斯克里斯蒂分校胡新平的职业奖。胡建议将研究和教育结合起来，对德克萨斯州南部米逊阿兰萨斯河口的碳循环和海洋酸化进行调查。该沿海系统受到季节和年份之间河流流量变化的强烈影响。河流流量变化与河口碳循环的关系尚不清楚。这种缺乏了解反过来又导致了全球河口碳预算估算的不确定性。此外，气候变化和其他人类活动严重影响河流流入河口和沿海海洋，进而影响这些环境中的生物地球化学和新陈代谢。尽管需要这些信息，但有助于解决这些生态系统中二氧化碳通量强度和方向变化的长期记录非常罕见。该项目旨在通过高强度现场采样和历史数据分析，提高对该河口和整个沿海海洋碳循环的了解。这项研究获得的结果还将提供有关河口对水文条件变化的生物地球化学响应的关键信息，因为美国西南部变得更加干燥，降水量总体下降。该项目的研究目标包括 1) 调查水文状态与河口之间的关系以亚热带半干旱河口 Mission-Aransas 河口为例的 CO2 分压 (pCO2)，2) 了解 CO2 通量的范围及其影响墨西哥湾西北部世界上最大的泻湖河口系统之一的水文控制，3) 阐明导致河口酸化的机制及其对二氧化碳通量的反馈。将开展高时间分辨率 pCO2 和水碳酸盐化学采样以及沉积物孵化的密集实地活动；对德克萨斯州环境质量委员会收集的数十年碳酸盐化学参数的分析将用于在该地区淡水日益短缺的背景下获得河口水 pCO2 的时间趋势。该职业奖的教育部分包括 1) 创建海洋和河口酸化研究课程，并为本科生和研究生重新设计两门现有课程，2) 与福伊穆迪高中合作开展水生科学教育，吸引主要来自以下地区的高中生在现场和实验室经验方面代表性不足且经济困难的背景。最终的教育目标是鼓励高中生走 STEM 道路接受大学教育，鼓励本科生 STEM 学生攻读研究生学位。这将是通过增加 STEM 领域具有学士或更高学位的毕业生数量来增强未来劳动力多样性的共同努力的一部分。 该项目将培养一名博士生。学生。来自代表性不足和经济困难背景的高中生和本科生实习生也将获得支持参加暑期研究。项目成果的更广泛传播将包括本科生在 TAMU-CC 和德克萨斯 A&M 大学系统组织的研讨会上的演讲、研究生和首席研究员在区域河口计划组织的各种会议上的公开研讨会、在国家和地区会议上的演讲。国际会议以及同行评审期刊上的出版物。

项目成果

Temporal variability and driving factors of the carbonate system in the Aransas Ship Channel, TX, USA: a time series study

• DOI: 10.5194/bg-18-4571-2021
• 发表时间: 2021-08
• 期刊: Biogeosciences
• 影响因子: 4.9
• 作者: Melissa R. McCutcheon;H. Yao;Cory J. Staryk;Xinping Hu

Ocean acidification in the Gulf of Mexico: Drivers, impacts, and unknowns

• DOI: 10.1016/j.pocean.2022.102882
• 发表时间: 2022-10-19
• 期刊: PROGRESS IN OCEANOGRAPHY
• 影响因子: 4.1
• 作者: Osborne，Emily;Hu，Xinping;Dash，Padmanava
• 通讯作者: Dash，Padmanava

Corrigendum: Disparate Responses of Carbonate System in Two Adjacent Subtropical Estuaries to the Influence of Hurricane Harvey – A Case Study

勘误表：两个相邻亚热带河口碳酸盐系统对飓风哈维影响的不同响应 — 案例研究

• DOI: 10.3389/fmars.2021.647961
• 发表时间: 2021
• 期刊: Frontiers in Marine Science
• 影响因子: 3.7
• 作者: Hu, Xinping;Yao, Hongming;Staryk, Cory J.;McCutcheon, Melissa R.;Wetz, Michael S.;Walker, Lily
• 通讯作者: Walker, Lily

Sulfate enrichment in estuaries of the northwestern Gulf of Mexico: The potential effect of sulfide oxidation on carbonate chemistry under a changing climate

墨西哥湾西北部河口的硫酸盐富集：气候变化下硫化物氧化对碳酸盐化学的潜在影响

• DOI: 10.1002/lol2.10335
• 发表时间: 2023
• 期刊: Limnology and Oceanography Letters
• 影响因子: 7.8
• 作者: Yin, Hang;Hu, Xinping;Dias, Larissa M.
• 通讯作者: Dias, Larissa M.

Carbonate chemistry in Mission Aransas Estuary from May 2014 to Feb 2017 and Dec 2018 to Feb 2020

2014年5月至2017年2月和2018年12月至2020年2月Mission Aransas Estuary的碳酸盐化学

• DOI: 10.26008/1912/bco-dmo.835227.1
• 发表时间: 2021
• 期刊: Biological and Chemical Oceanography Data Management Office (BCO-DMO
• 作者: McCutcheon, Melissa R.;Hu, Xinping
• 通讯作者: Hu, Xinping