| タイトル | Biological weighting function for the inhibition of phytoplankton photosynthesis by ultraviolet radiation |
| 著者（英） | Cullen, John J.; Lesser, Michael P.; Neale, Patrick J. |
| 著者所属（英） | NASA Headquarters |
| 発行日 | 1992-10-23 |
| 言語 | eng |
| 内容記述 | Severe reduction of stratospheric ozone over Antarctica has focused increasing concern on the biological effects of ultraviolet-B (UVB) radiation (280 to 320 nanometers). Measurements of photosynthesis from an experimental system, in which phytoplankton are exposed to a broad range of irradiance treatments, are fit to an analytical model to provide the spectral biological weighting function that can be used to predict the short-term effects of ozone depletion on aquatic photosynthesis. Results show that UVA (320 to 400 nanometers) significantly inhibits the photosynthesis of a marine diatom and a dinoflagellate, and that the effects of UVB are even more severe. Application of the model suggests that the Antarctic ozone hole might reduce near-surface photosynthesis by 12 to 15 percent, but less so at depth. The experimental system makes possible routine estimation of spectral weightings for natural phytoplankton. |
| NASA分類 | OCEANOGRAPHY |
| レポートNO | 93A26724 |
| 権利 | Copyright |
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