Arctic Ocean Acidification: Bering Strait Time Series

该项目是北极观测网络的一部分，将从白令海峡现有的一个系泊处收集两年的与海洋酸化有关的现场数据。海洋对二氧化碳的吸收降低了海水的pH值，改变了海水中几种关键化学成分的形态，对生物的生理和海水中的声音传播产生了重要影响。考虑到大气中二氧化碳水平上升的全球耦合气候模型预测，北冰洋将是世界上第一个也是最强烈的酸化影响的海洋-S海洋。全球和区域模型界都需要在北冰洋关键地点进行高质量观测，以测试和改进其预测能力。该项目的仪器包括基于指示剂的(SAMI)二氧化碳和pH传感器，以及带有溶解氧光电传感器和电导传感器的固态IS-FET pH传感器。将通过水文测量和采样程序对二氧化碳、DIC、碱度和氧气进行校准，同时进行所有部署和回收。这将是指示器和固态酸碱度传感器首次在海洋中共同部署，从而首次比较它们在实际现场条件下的性能。需要这样的信息来更全面地描述固态系统的特征，这些系统需要更低的功率要求来扩展滑翔机、浮标和系泊部署。从这类比较活动中获得的见解将为北极观测网络和最终的全球海洋酸化观测网络的设计提供参考。投资促进机构将在其正在进行的一系列教育和非正式外联活动中处理海洋酸化问题。他们还将通过征求俄勒冈州课堂的参与，为现有的北极观测网络-白令海峡项目利用海上教师计划。俄亥俄州立大学荣誉计划的本科生将接触到这个新出现的现实世界问题，并通过在该项目的实验室组件中进行培训。数据将存放在北极合作数据和信息服务处(CADIS)。

This project, part of the Arctic Observing Network, will collect two years of in situ data pertaining to ocean acidification from an existing mooring in Bering Strait. Oceanic uptake of CO2 lowers pH and changes speciation of several key chemical constituents of seawater with important consequences for the physiology of organisms and transmission of sound in seawater. Global coupled climate models that take into account rising levels of CO2 in the atmosphere predict that the Arctic Ocean will be the first and most strongly impacted of the world?s oceans by acidification. High quality observations in key Arctic Ocean locations are needed for both the global and regional modeling communities to test and improve their predictive capabilities. Instruments for the project include indicator based (SAMI) pCO2 and pH sensors as well as a solid state IS-FET pH sensor with dissolved oxygen optode and conductivity sensors. Calibration will be achieved through a hydrographic measurement and sampling program for pCO2, DIC, alkalinity and O2 conducted in conjunction with all deployment and recoveries. This will be the first extended co-deployment of indicator and solid-state pH sensors in the oceans and thus the first comparison of their performance under realistic field conditions. Such information is needed to more fully characterize the solid-state systems whose lower power requirements are desirable for extended glider, float and mooring deployment. Insights from comparative exercises such as this will inform the design of the Arctic Observing Network and an eventual global ocean acidification observation network. The PIs will address ocean acidification in a range of their on-going educational and informal outreach activities. They will also leverage the Teacher-At-Sea program for the existing Arctic Observing Network-Bering Strait project by soliciting participation by Oregon classrooms. Undergraduates in the OSU honors program will be exposed to this emerging real world problem and gain training through entrainment in the laboratory components of the project. Data will be deposited with the Cooperative Arctic Data and Information Service (CADIS).