Net and Gross O2 Production in the JGOFS Arabian Sea Process Study

JGOFS 阿拉伯海工艺研究中的净氧气产量和总氧气产量

• 批准号: 9310574
• 负责人: Michael Bender
• 金额: $ 22.6万
• 依托单位: University of Rhode Island
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-12-01 至 1997-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9310574&HistoricalAwards=false
• 关键词: Net; Gross; O2; Production; JGOFS

9310574 Bender As part of the U.S.JGOFS Arabian Sea Process Study effort to understand how physical forcing by the regional monsoons affects marine primary production and the regional carbon budget, the PI will carry out shipboard incubations of seawater samples to estimate seasonal photosynthetic production rates of molecular oxygen. Because the oxygen and organic carbon produced during photosynthesis are in a fixed proportion, these measurements will provide indirect measurements of primary production by making direct measurements of carbon. Similar shipboard laboratory studies will be carried out at different light levels to derive quantitative relationships that would then permit the estimation of in situ water column production rates from bio-optical data. Additionally, in order to calculate how much of the oxygen escapes to the atmosphere, the PI plans to make frequent measurements of dissolved oxygen and argon (a non-reactive gas that can be used as a mixing tracer) in the upper wind-mixed water column along the cruise track. The PI expects these studies to provide major insights into the oxygen and carbon dynamics of the Arabian Sea region and that these insights will benefit our understanding of the global carbon cycle. ***

小行星9310574 作为美国JGOFS阿拉伯海过程研究的一部分，以了解区域季风的物理强迫如何影响海洋初级生产和区域碳收支，PI将对海水样品进行船上培养，以估计分子氧的季节性光合作用生产率。 由于光合作用过程中产生的氧和有机碳是固定比例的，这些测量将通过直接测量碳来间接测量初级生产。 将在不同的光照水平下进行类似的船上实验室研究，以得出定量关系，从而可以根据生物光学数据估计现场水柱产生率。 此外，为了计算有多少氧气逃逸到大气中，PI计划经常测量溶解氧和氩气（一种可用作混合示踪剂的非反应性气体），这些气体位于沿着巡航轨迹的风混合水柱中。 PI希望这些研究能够为阿拉伯海地区的氧和碳动态提供重要见解，这些见解将有助于我们对全球碳循环的理解。 ***