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.

该项目是德克萨斯州A＆M University-Corpus Christi的Xinping Hu的职业奖。 HU建议将研究和教育整合到对南德克萨斯州瓦兰萨斯河口的碳循环和海洋酸化的调查中。这种沿海体系受到季节之间河流流量变化的强烈影响。尚不清楚河流流动与河流循环的关系的关系。这种缺乏理解反过来有助于估计全球河口碳预算的不确定性。此外，气候变化和其他人类活动严重影响了河流对河口和沿海海洋的投入，这会影响这些环境中的生物地球化学和代谢。尽管需要这些信息，但可以帮助解决这些生态系统中二氧化碳通量的强度和方向的变化的长期记录非常罕见。使用高强度的现场采样和历史数据分析，该项目旨在提高对本河口和整个沿海海洋中碳循环的了解。 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通量及其在墨西哥西北湾世界上最大的泻湖河口系统之一中的通量及其水文控制，3）阐明了导致河口酸化及其对CO2通量的反馈的机制。将进行高暂时分辨率PCO2和水碳酸盐化学采样以及沉积物孵化的密集田间运动；德克萨斯州环境质量委员会收集的多年碳酸盐化学参数的分析将用于在该地区增加淡水稀缺的背景下获得河口水PCO2的时间趋势。该职业奖的教育组成部分包括1）创建海洋和河口酸化研究课程，并重新设计了本科和研究生的两个现有课程，2）与Foy Moody高中合作进行水上科学教育，以吸引高中生，主要是从缺乏人物的缺点和经济挑战的背景和经济挑战的背景。最终的教育目标是鼓励高中生遵循他们的大学教育的STEM道路，并在本科STEM学生攻读研究生学位。这将是通过增加STEM领域具有学士学位或更高程度的代表性不足的毕业生人数来提高未来劳动力多样性的共同努力的一部分。 该项目将培训一位博士学位。学生。还将支持来自代表性不足和经济挑战的背景的高中生和本科实习生参加夏季研究。对项目发现的更广泛的传播将包括由TAMU-CC和Texas A＆M大学系统组织的研讨会上的本科生演讲，研究生的公开研讨会以及由区域河口计划组织的各种会议，国家和国际会议的各种会议，以及Peer-International会议以及Peer-Creener-Review exners-Review exnals exnals ofners intaurection-exnals-review exnals exnals ofneals ofneals nearners earkners earkners jearners jearners jearners jearners jearners jearners jearners jearners jearners jearners。

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