pH, Oxygen and Nitrate Chemical Sensors for Southern Ocean Floats

适用于南大洋浮标的 pH、氧气和硝酸盐化学传感器

• 批准号: 1353177
• 负责人: Kenneth Johnson
• 金额: $ 13.54万
• 依托单位: Monterey Bay Aquarium Research Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-10-01 至 2015-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1353177&HistoricalAwards=false
• 关键词: pH; Oxygen; Nitrate; Chemical; Sensors

The proposal will build and validate a set of 6 pH and nitrate sensors for profiling floats that will be deployed in the Southern Ocean. These sensors will be integrated with floats supplied by the University of Washington Float lab. In addition to the pH and oxygen sensors, the floats will also carry fluorescence optode oxygen sensors together with biooptical sensors for chlorophyll fluorescence and backscatter. Each float will operate for approximately 330 profiles from 1700 m depth to the surface. This should equate to a 5 year endurance at profiling intervals near 7 days. The profiling floats will be deployed along the decadal CLIVAR P16S cruise, scheduled to leave New Zealand in March 2014. The P16S line will go north from the ice edge along 150 degrees W. Three of the floats with chemical sensors will be deployed at latitudes where there should be seasonal ice cover and three will be deployed to the north of the ice covered ocean.The pH data collected by the floats should provide one of the first records of the annual cycle of pH in a region that is expected to become undersaturated with aragonite as atmospheric CO2 continues to increase. This will allow a unique assessment of the ability of current generation climate models to predict ocean pH trajectories.

该提案将建立和验证一组6个pH和硝酸盐传感器，用于分析将部署在南大洋中的浮子。这些传感器将与华盛顿大学Float Lab提供的浮子集成。除了pH和氧气传感器外，浮子还将携带荧光量电氧传感器以及生物透明传感器以及用于叶绿素荧光和反向散射的生物光传感器。每个浮子将以大约330个轮廓从1700 m的深度到表面运行。这应该等同于在7天接近分析间隔的5年耐力。分析的漂浮物将沿际十年clivar p16s巡游部署，原定于2014年3月离开新西兰。P16S线将沿150度W沿冰边缘向北移动。三个带有化学传感器的浮子在冰上部署在冰上，将在纬度部部署在纬度上，应在沿线覆盖冰层，并将冰覆盖在冰上覆盖层，而sece phate则置于iCe。随着大气二氧化碳的不断增长，预计将与后者变得不饱和的区域中pH年度周期的记录。这将允许对当前一代气候模型预测海洋pH轨迹的能力进行独特的评估。