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首页> 外文期刊>Environmental Science & Technology >Ultraviolet Radiation Affects Emission of Ozone-Depleting Substances by Marine Macroalgae: Results from a Laboratory incubation Study
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Ultraviolet Radiation Affects Emission of Ozone-Depleting Substances by Marine Macroalgae: Results from a Laboratory incubation Study

机译：紫外线辐射影响海洋大型藻类消耗臭氧层物质的排放：实验室培养研究的结果

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摘要

The depletion of stratospheric ozone due to the effects of ozone-depleting substances, such as volatile organo-halogens, emitted into the atmosphere from industrial and natural sources has increased the amount of ultraviolet radiation reaching the earth's surface. Especially in the subpolar and polar regions, where stratospheric ozone destruction is the highest, individual organisms and whole ecosystems can be affected. In a laboratory study, several species of marine macroalgae occurring in the polar and northern temperate regions were exposed to elevated levels of ultraviolet radiation. Most of the macroalgae released significantly more chloroform, bromoform, dibromomethane, and methyl iodide - all volatile organohalogens. Calculating on the basis of the release of total chlorine, bromine, and iodine revealed that, except for two macroalgae emitting chlorine and one alga emitting iodine, exposure to ultraviolet radiation caused macroalgae to emit significantly more total chlorine, bromine, and iodine. Increasing levels of ultraviolet radiation due to possible further destruction of the stratospheric ozone layer as a result of ongoing global atmospheric warming may thus increase the future importance of marine macroalgae as a source for the global occurrence of reactive halogen-containing compounds.
机译：从工业和自然资源排放到大气中的消耗臭氧层物质（例如挥发性有机卤素）的影响，导致平流层臭氧的消耗增加了到达地球表面的紫外线辐射量。特别是在平流层臭氧破坏最高的亚极和极地地区，单个生物体和整个生态系统都可能受到影响。在实验室研究中，在极地和北部温带地区出现的几种海洋大型藻类都暴露于高水平的紫外线辐射下。大多数大型藻类释放出更多的氯仿，溴仿，二溴甲烷和甲基碘-所有这些都是挥发性有机卤素。根据总氯，溴和碘的释放量进行计算，结果表明，除了两种放出氯的大型藻类和一种放出碘的藻类之外，暴露于紫外线下会使大型藻类散发出更多的总氯，溴和碘。由于持续的全球大气变暖导致平流层臭氧层可能进一步破坏而导致紫外线辐射水平上升，因此可能会增加海洋大型藻类作为全球范围内反应性含卤素化合物的来源的未来重要性。

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