Ocean acidification in the western Arctic Ocean

北冰洋西部海洋酸化

• 批准号: 1926158
• 负责人: Wei-Jun Cai
• 金额: $ 39.13万
• 依托单位: University of Delaware
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-08-15 至 2023-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1926158&HistoricalAwards=false
• 关键词: Ocean; acidification; western; Arctic

Rising carbon dioxide concentrations in the atmosphere, global climate change, and the sustainability of the Earth's biosphere are of great societal concern. This is true in the Arctic Ocean as it is widely viewed as one of the most sensitive regions on Earth to climate change. Understanding the carbon cycle and its underlying control mechanisms is necessary to predict how carbon flux in the Arctic Ocean will change, as well as feedbacks to the larger climate system. This project will measure components of the carbonate system to understand ocean acidification in the western Arctic Ocean through collaboration with the Chinese National Arctic Research Expedition (CHINARE) cruises along a transect from the Bering Strait to high latitude basins. The investigator will collect high resolution inorganic carbon data during summer 2020. These data, supplemented by a subset of data collected in 2019 and 2021 by CHINARE collaborators, will be used to understand the mechanisms controlling carbon cycle and fluxes and ocean acidification in the western Arctic Ocean and the changes that have occurred in recent decades. Continued data collection and data synthesis are important to understand major environmental and climate-related changes in the marine carbonate system in the Arctic Ocean. This research will enhance the infrastructure of ocean carbon research and general science education through teaching undergraduate and graduate courses at the University of Delaware. In addition, it will enhance international collaboration and public awareness of climate change and environmental issues through public outreach activities. Observing and understanding the mechanisms controlling the carbon cycle in the Arctic Ocean is necessary to predict future conditions and feedbacks to climate change. This study will test the hypothesis that high biological production and low partial pressure of carbon dioxide (pCO2) are limited to the Chukchi shelf and the sea-ice melt edge and that ice-free basin areas are characterized by high pCO2, low pH, and low carbonate saturation state. A comparison of the new data with those collected between 2008 and 2018 during CHINARE, as well as other historical data, will be used to test the hypothesis that the expansion of the basin area to north characterized by increasingly higher pCO2 and lower pH is due to the earlier timing and longer summer warming, reduced buffer capacity, and increased pCO2 in the atmosphere. Finally, water column data collected in 2020 together with earlier data will be used to test the hypothesis that the expansion of ocean acidification from subsurface to deeper depths and to higher latitudes is primarily caused by the increased input of the Pacific Winter Water into the subsurface basin driven by rapid environment change such as sea-ice retreat.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

大气中的二氧化碳浓度上升，全球气候变化以及地球生物圈的可持续性引起了极大的关注。在北极海洋中，这是正确的，因为它被广泛认为是地球上最敏感的地区之一。了解碳循环及其潜在的控制机制对于预测北极海洋中的碳通量将如何变化以及对较大气候系统的反馈。该项目将通过与中国国家北极研究探险队（Chinare）的合作来衡量碳酸盐系统的组成部分，以了解西部北极海洋的海洋化。研究人员将在2020年夏季收集高分辨率的无机碳数据。这些数据由2019年和Chinare合作者在2019年和2021年收集的一部分数据进行了补充，将用于了解控制碳循环的机制，碳循环和范围和海洋酸化的西方北极海洋以及最近几十年发生的变化。持续的数据收集和数据合成对于了解北极海洋碳酸盐系统的主要环境和气候相关的主要变化很重要。这项研究将通过特拉华大学的本科和研究生课程来增强海洋碳研究和一般科学教育的基础设施。此外，它将通过公共宣传活动增强国际合作和公众对气候变化和环境问题的认识。必须观察和理解控制北极海洋中碳循环的机制，以预测未来的条件和对气候变化的反馈。这项研究将检验以下假设：二氧化碳（PCO2）的高生物产生和低部分压力仅限于Chukchi架子和Sea-Ice熔体边缘，而无冰盆地区域的特征是高PCO2，低pH值，低碳酸盐和低碳酸盐饱和状态。将新数据与2008年至2018年期间收集的数据以及其他历史数据的比较，将用于测试以下假设：盆地面积扩展到北部的北部特征是越来越高的PCO2和较低的pH值是由于较早的时机和更长的夏季变暖，越来越长的夏季变暖，减少的缓冲能力，并且PCO2在大气中增加了PCO2。最后，在2020年收集的水柱数据以及较早的数据将用于测试以下假设：海洋酸化从地下到更深的深度和更高纬度的扩展主要是由于太平洋冬季水的投入增加了对地下盆地的投入增加而引起和更广泛的影响审查标准。

项目成果

Climate change drives rapid decadal acidification in the Arctic Ocean from 1994 to 2020

• DOI: 10.1126/science.abo0383
• 发表时间: 2022-09
• 期刊: Science
• 影响因子: 56.9
• 作者: D. Qi;Z. Ouyang;Liqi Chen;Yingxu Wu;R. Lei;Baoshan Chen;R. Feely;L. Anderson;Wenli Zhong;Hongmei Lin;A. Polukhin;Yixing Zhang;Yongli Zhang;Haibo Bi;Xinyu Lin;Yiming Luo;Yanpei Zhuang;Jian-feng He;Jianfang Chen;W. Cai