Ozone Diminution, Ultraviolet Radiation and Phytoplankton Biology in Antarctic Waters

由于南极臭氧层空洞，到达地球表面的紫外线(UV)辐射增加的生物后果最近被记录在案。根据对紫外线辐射和初级生产力的直接现场测量，估计与臭氧有关的对浮游植物的破坏导致南大洋边缘冰区初级生产力至少下降6%至12%。该项目将通过建立南大洋入射和穿透光谱辐射的空间和时间气候学来进一步研究这一专题。此外，还将确定依赖于紫外光产生有机碳和紫外光损伤的大小和动力学。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。结果将大大有助于预测经历紫外线辐射增强的浮游植物群落内的变化，并为开发模型提供经验基础，试图评估南极食物网营养水平较高的后果。

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.