Collaborative Research: The O2/N2 Ratio and CO2 Airborne Southern Ocean (ORCAS) Study

合作研究：O2/N2 比率和二氧化碳机载南大洋 (ORCAS) 研究

• 批准号: 1501993
• 负责人: Britton Stephens
• 金额: $ 55.52万
• 依托单位: University Corporation For Atmospheric Res
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-05-15 至 2019-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1501993&HistoricalAwards=false
• 关键词: Collaborative; Research; O2; N2; Ratio

The Southern Ocean plays a dominant role in the oceanic uptake of excess (anthropogenic) carbon, yet the extent of this air-sea exchange process is poorly represented by earth system models, and its future projection remains highly uncertain. The O2/N2 Ratio and CO2 Airborne Southern Ocean Study (ORCAS) seeks to advance understanding of the physical and biological controls on air-sea exchange and uptake of O2 and CO2 in the vast Southern Ocean. This will be investigated through intensive airborne surveys of atmospheric O2, CO2, related gases, their state of equilibrium, along with other ocean surface properties over diverse biogeochemical regions adjacent to the southern tip of South America and the Western Antarctic Peninsula. ORCAS will utilize the NSF Gulfstream V (GV) aircraft equipped with a suite of high-precision in situ and remote sensing instruments, on 14 flights over a period of 6 weeks in austral mid-summer, from Punta Arenas, Chile, out over the Drake Passage, and with concurrent overflights of the ARSV LM Gould sampling the Palmer LTER site. ORCAS observations will be guided by, and used to test a suite of ocean biogeochemistry models to improve our understanding of key processes and feedbacks in this under sampled yet climatically important region of the world.

南方海洋在过量（人为）碳的海洋吸收中起着主要作用，但是这种空气海交换过程的程度却不足以代表地球系统模型，并且其未来投影仍然高度不确定。 O2/N2比率和CO2 Sirporn Southern海洋研究（ORCAS）旨在提高人们对广阔南大洋中O2和CO2的物理和生物控制的了解。这将通过对大气O2，CO2，相关气体，平衡状态以及其他海面特性以及与南美南部南端和南极西部半岛相邻的不同生物地球化学区域的其他海面特性进行密集的空中调查。 ORCAS will utilize the NSF Gulfstream V (GV) aircraft equipped with a suite of high-precision in situ and remote sensing instruments, on 14 flights over a period of 6 weeks in austral mid-summer, from Punta Arenas, Chile, out over the Drake Passage, and with concurrent overflights of the ARSV LM Gould sampling the Palmer LTER site.逆戟鲸的观察将受到指导，并用来测试一套海洋生物地球化学模型，以提高我们对世界上但气候重要的地区的关键过程和反馈的理解。

项目成果

Strong Southern Ocean carbon uptake evident in airborne observations

机载观测显示南大洋碳吸收强劲

• DOI: 10.1126/science.abi4355
• 发表时间: 2021
• 期刊: Science
• 影响因子: 56.9
• 作者: Long, Matthew C.;Stephens, Britton B.;McKain, Kathryn;Sweeney, Colm;Keeling, Ralph F.;Kort, Eric A.;Morgan, Eric J.;Bent, Jonathan D.;Chandra, Naveen;Chevallier, Frederic
• 通讯作者: Chevallier, Frederic