Ozone Diminution, Ultraviolet Radiation and Phytoplankton Biology in Antarctic Waters

南极水域臭氧减少、紫外线辐射和浮游植物生物学

• 批准号: 9220962
• 负责人: Raymond Smith
• 金额: $ 84.09万
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-02-15 至 1996-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9220962&HistoricalAwards=false
• 关键词: Ozone; Diminution; Ultraviolet; Radiation; Phytoplankton

The biological consequences of increased ultraviolet (UV) radiation reaching the Earth's surface due to the Antarctic Ozone Hole has recently been documented. Based on direct in situ measurements of ultraviolet radiation and primary productivity, it was estimated that ozone-related damage to phytoplankton resulted in a minimum of six to twelve per cent reduction in primary productivity within the marginal ice zone of the Southern Ocean. This project will further examine this topic by developing a space and time climatology of incident and penetrating spectral irradiance for the Southern Ocean. Also, the magnitude and kinetics of UV dependent production of organic carbon and UV photodamage will be determined. The data will be examined in the context of a bio-optical model of primary productivity. Results will contribute significantly to abilities to predict changes within phytoplankton communities experiencing enhanced UV radiation and provide an empirical basis for developing models attempting to assess the consequences for higher trophic levels in the Antarctic food web.

由于南极臭氧洞，到达地球表面的紫外线（UV）辐射增加的生物学后果最近已被记录在案。根据对紫外线辐射和初级生产力的直接实地测量，估计臭氧对浮游植物造成的损害导致南大洋边缘冰带内初级生产力至少减少6%至12%。本项目将通过编制南大洋入射和穿透光谱辐照度的时空气候学进一步研究这一主题。此外，有机碳的紫外依赖性生产和紫外光损伤的幅度和动力学将被确定。这些数据将在初级生产力的生物光学模型的背景下进行审查。研究结果将大大有助于预测经历增强紫外线辐射的浮游植物群落变化的能力，并为开发试图评估南极食物网中更高营养水平的后果的模型提供经验基础。