EAGER: Initiation of a pH/pCO2-sensing mooring platform on the Oregon coast

EAGER：在俄勒冈州海岸启动 pH/pCO2 感应系泊平台

• 批准号: 0956197
• 负责人: Bruce Menge
• 金额: $ 18万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-08-15 至 2012-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0956197&HistoricalAwards=false
• 关键词: EAGER; Initiation; pH; pCO2; sensing

Ocean acidification (OA), the progressive decrease in ocean pH as atmospheric carbon dioxide (CO2) dissolves in sea water, is a looming issue with impacts that are still uncertain, but may disrupt ocean ecosystems. This project will deploy accurate and precise in-situ sensors that will begin the development of pH and pCO2 time series off the central Oregon coast - a region that is amongst the mostly strongly impacted by corrosive upwelled waters within the California Current system. These sensors, in conjunction with lower-frequency ship-based calibration as well as horizontal and vertical samples, will provide a detailed and integrated look at the scope and impacts of accelerated biogeochemical changes in a coastal inner-shelf ecosystem that is currently unmonitored for carbonate chemistry shifts. Intellectual Merit: Coastal waters in upwelling regions will experience some of the earliest and most severe onsets of ocean acidification. Already, limited field surveys suggest that the portions of the California Current system (CCS) are experiencing low pH conditions during the summer upwelling season. Determination of the direct and indirect impact of ocean acidification on marine calcifiers and other pH or pCO2 sensitive organisms depends critically on accurate assessments of both current OA stress regimes and the likely scope of future biogeochemical change. To date, we have virtually no such time series in the inner-shelf waters of upwelling shelves where the combined burdens of CO2 increase from anthropogenic and respiratory sources are maximal. This observational gap is a severe impediment to progress in the study of this major consequence of global climate change and its ecological consequences. This is due largely to the lack of accurate and reliable sensors that can be deployed in the field in inner shelf waters. Recently, sensors for pH and pCO2 have been developed that are capable of providing the required accuracy, precision and reliability needed in instruments deployed in the challenging and dynamic environments of the inner shelf. For systems where biogeochemical signals are spatially heterogeneous, an important criterion for developing time series data is the ability to resolve spatial variations that are ecologically important and/or crucial for controlling for potential aliasing effects. OSU-PISCO (Oregon State University, Partnership for Interdisciplinary Studies of Coastal Oceans) has acquired funds for one sensor array, and in July 2009, will deploy the array on a mooring to begin the first pH and pCO2 time series in the inner shelf waters of the northern CCS. This EAGER project will allow deployment of a second sensor array. The project has three goals: documenting spatial differences between pH and pCO2 between the two coastal sites, providing a contrasting monitored site for organismal and ecological impacts studies, and providing a regional "back-up" site in case of loss or failure of the first instruments. The expanded regional sensor array in Oregon will be linked to arrays at Bodega Marine Lab and in southern California to form the first stage of what we expect will be a west coast network of ocean acidification sensors. These will provide the first datasets available for establishing the contextual environmental information necessary for research on the ecological consequences of ocean acidification. Broader Impacts: Ocean acidification is a timely and important concern and there is a need for immediate and concerted focus by scientists, economists, policy-makers, managers and the public. To interpret and evaluate lab and field studies of OA impacts on the marine biota accurate data on pH levels and variability in the natural environment are essential. This project will have a major impact on building research capacity in this area by adding another observation site at a critical location where there is intense upwelling. This site will add to a network of other monitoring and research sites in the California Current system. Information about this project will be communicated via educational and outreach activities through the PISCO policy program and instructional activities of the PIs and colleagues.

海洋酸化（OA），即大气中二氧化碳（CO2）溶解在海水中导致海洋 pH 值逐渐下降，是一个迫在眉睫的问题，其影响仍不确定，但可能会破坏海洋生态系统。该项目将部署精确的现场传感器，开始开发俄勒冈州中部海岸附近的 pH 和 pCO2 时间序列，该地区是受加州洋流系统内腐蚀性上升流影响最严重的地区之一。这些传感器与低频船基校准以及水平和垂直样本相结合，将提供对目前尚未监测碳酸盐的沿海内陆架生态系统中加速生物地球化学变化的范围和影响的详细和综合的了解化学变化。智力优势：上升流区域的沿海水域将经历一些最早和最严重的海洋酸化。有限的实地调查已经表明，加州洋流系统 (CCS) 的部分地区在夏季上升流季节正经历低 pH 条件。确定海洋酸化对海洋钙化物和其他 pH 或 pCO2 敏感生物体的直接和间接影响关键取决于对当前 OA 胁迫状况和未来生物地球化学变化的可能范围的准确评估。迄今为止，我们在上升流陆架的内陆水域中几乎没有这样的时间序列，其中人为和呼吸源增加的二氧化碳综合负担最大。这种观测差距严重阻碍了全球气候变化这一重大后果及其生态后果的研究取得进展。这主要是由于缺乏可部署在内陆架水域的准确可靠的传感器。最近，我们开发出了 pH 和 pCO2 传感器，能够为部署在充满挑战和动态的内架环境中的仪器提供所需的准确度、精密度和可靠性。对于生物地球化学信号在空间上异质的系统，开发时间序列数据的一个重要标准是解决空间变化的能力，这些空间变化在生态上很重要和/或对于控制潜在的混叠效应至关重要。 OSU-PISCO（俄勒冈州立大学，沿海海洋跨学科研究合作伙伴）已获得用于一个传感器阵列的资金，并将于 2009 年 7 月将该阵列部署在系泊处，以开始内陆架水域的第一个 pH 和 pCO2 时间序列北部CCS。这个 EAGER 项目将允许部署第二个传感器阵列。 该项目有三个目标：记录两个沿海站点之间 pH 和 pCO2 之间的空间差异，为有机体和生态影响研究提供对比监测站点，并在第一个站点丢失或失败时提供区域“备用”站点仪器。俄勒冈州扩大的区域传感器阵列将与博德加海洋实验室和南加州的阵列连接起来，形成我们预期的西海岸海洋酸化传感器网络的第一阶段。这些将为研究海洋酸化的生态后果提供必要的背景环境信息，提供第一批数据集。更广泛的影响：海洋酸化是一个及时而重要的问题，科学家、经济学家、政策制定者、管理者和公众需要立即一致关注。为了解释和评估 OA 对海洋生物群影响的实验室和现场研究，有关 pH 值水平和自然环境变化的准确数据至关重要。该项目将通过在有强烈上升流的关键位置增加另一个观测站，对该领域的研究能力建设产生重大影响。 该站点将添加到加州洋流系统中其他监测和研究站点的网络中。有关该项目的信息将通过 PISCO 政策计划以及 PI 和同事的教学活动通过教育和外展活动进行传达。