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）是随着大气中的二氧化碳（CO2）溶解在海水中而导致海洋pH值逐渐下降，这是一个迫在眉睫的问题，其影响仍然不确定，但可能会破坏海洋生态系统。该项目将部署准确和精确的原位传感器，开始开发俄勒冈州中部海岸的pH值和pCO 2时间序列-该地区是受加州海流系统内腐蚀性涌上沃茨影响最严重的地区之一。这些传感器，结合低频船基校准以及水平和垂直样本，将提供一个详细的综合研究的范围和影响，加速海洋地球化学变化的沿海内陆架生态系统，目前未监测碳酸盐化学变化。智力成果：上升流区域的沿海沃茨将经历最早和最严重的海洋酸化。有限的实地调查已经表明，部分加州电流系统（CCS）正在经历低pH值的条件下，在夏季上升流季节。确定海洋酸化对海洋钙化菌和其他pH或pCO 2敏感生物的直接和间接影响，关键取决于对当前OA压力机制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，在上升流大陆架的内大陆架沃茨水域中，我们几乎没有这样的时间序列，在这些水域中，人为和呼吸源造成的二氧化碳综合负担增加最大。这一观测空白严重阻碍了对全球气候变化及其生态后果这一重大后果的研究取得进展。这在很大程度上是由于缺乏可在内陆架沃茨实地部署的准确可靠的传感器。最近，已经开发出pH和pCO 2传感器，能够提供部署在内架的挑战性和动态环境中的仪器所需的准确度，精度和可靠性。对于地球化学信号在空间上不均匀的系统，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学上是重要的和/或对控制潜在的混叠效应至关重要。OSU-PISCO（俄勒冈州州立大学，沿海海洋跨学科研究伙伴关系）已经获得了一个传感器阵列的资金，并将于2009年7月在系泊装置上部署该阵列，以便开始在北方CCS的内大陆架沃茨进行第一次pH值和pCO 2时间序列。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：记录两个沿海地点之间pH和pCO 2之间的空间差异，为生物和生态影响研究提供对比监测地点，并在第一台仪器丢失或故障的情况下提供区域“备用”地点。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加州南部的阵列相连，形成我们预计将成为西海岸海洋酸化传感器网络的第一阶段。这些将提供第一批数据集，用于建立研究海洋酸化的生态后果所需的背景环境信息。更广泛的影响：海洋酸化是一个及时和重要的问题，需要科学家、经济学家、决策者、管理人员和公众立即给予一致关注。为了解释和评价有机农业对海洋生物群影响的实验室和实地研究，关于自然环境pH值和变异性的准确数据至关重要。该项目将在一个有强烈上升流的关键地点增加另一个观测点，从而对该地区的研究能力建设产生重大影响。 该网站将添加到加州电流系统中的其他监测和研究网站的网络中。有关该项目的信息将通过皮斯科政策计划和PI及其同事的教学活动，通过教育和推广活动进行交流。