Resolving CO2 System Seasonality in the West Antarctic Peninsula with Autonomous Observations

通过自主观测解决南极西部半岛二氧化碳系统的季节性问题

• 批准号: 1543380
• 负责人: Elizabeth Shadwick
• 金额: $ 45.12万
• 依托单位: College of William & Mary Virginia Institute of Marine Science
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-08-01 至 2020-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1543380&HistoricalAwards=false
• 关键词: Resolving; CO2; System; Seasonality; West

Interest in the reduced alkalinity of high latitude waters under conditions of enhanced CO2 uptake from the atmosphere have been the impetus of numerous recent studies of bio-stressors in the polar marine environment. The project seeks to improve our understanding of the variance of coastal Southern Ocean carbonate species (CO2 system), its diurnal and inter-annual variability, by acquiring autonomous, high frequency observations from an Antarctic coastal mooring(s). A moored observing system co-located within the existing Palmer LTER array will measure pH, CO2 partial pressure, temperature, salinity and dissolved oxygen with 3-hour frequency in this region of the West Antarctic Peninsula continental shelf. Such observations will help estimate the dominant physical and biological controls on the seasonal variations in the CO2 system in coastal Antarctic waters, including the sign, seasonality and the flux of the net annual air-sea exchange of carbon dioxide. The Palmer LTER site is experiencing rapid ecological change in the West Antarctic Peninsula, a region that is warming at rates faster than any other region of coastal Antarctica.

对高纬度沃茨在从大气中吸收CO2增加的条件下碱度降低的兴趣是最近对极地海洋环境中生物压力源进行的许多研究的推动力。该项目旨在通过从南极沿海系泊处获取自主高频观测数据，提高我们对南大洋沿海碳酸盐物种（CO2系统）的变化及其日变化和年际变化的理解。在现有的Palmer LTER阵列内共同设置的一个系泊观测系统将在西南极半岛大陆架这一区域以3小时的频率测量pH值、CO2分压、温度、盐度和溶解氧。这种观测将有助于估计对南极沿海沃茨二氧化碳系统季节性变化的主要物理和生物控制，包括二氧化碳年度净海气交换的符号、季节性和通量。Palmer LTER站点正在经历西南极半岛的快速生态变化，该地区的变暖速度比南极洲沿海任何其他地区都快。