By Peter Lumsden (editor)

One of many expected outcomes of the depletion of stratospheric ozone is a rise within the volume of ultraviolet gentle achieving the outside of the earth, specifically UV-B (320-280nm). even supposing the genuine results are as but unknown, this modification in radiation can have profound results for plant progress and productiveness. the necessity for info about the dating among crops and UV-B is consequently urgent. This quantity brings jointly authoritative contributions from top specialists in UV-B/plant stories and is exclusive in contemplating interactions at numerous scales, starting from the extent of the mobilephone via to the extent of the group. info referring to ozone depletion and actual facets of UV-B radiation enhances the organic info to supply an intensive and entire overview of the current prestige of information.

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Extra resources for Plants and UV-B: Responses to Environmental Change (Society for Experimental Biology Seminar Series (No. 64))

Sample text

Over the course of the year, ozone depletion is variable, with the main decrease occurring in late winter and early spring; although total UV-B is much less at this time than during summer, the proportional increase is greatest during spring and is therefore mainly of threat to crops and other plants growing at this time. Understanding the impacts of this increase on plants requires appropriate action spectra. In approximate terms, an action spectrum indicates the relative effectiveness of different wavelengths of radiation in bringing about a particular response.

1996). Model calculations of ozone depletion in the Arctic polar vortex for 1991-92 to 199495. Geophysical Research Letters, 23, 559-62. G. D. (1985). Large losses of total ozone in Antarctica reveal seasonal C1OX-NOX interaction. Nature, 35, 207-10. E. (1995). The stratospheric polar vortex and sub-vortex: fluid dynamics and middle latitude ozone loss. Philosophical Transactions of the Royal Society, London A, 352, 227^0. Molina, M. S. (1974). Stratospheric sink for chlorofluoromethanes: chlorine atom catalyzed destruction of ozone.

1995) from 12 stations in the Northern and Southern Hemispheres using spectral (and a few broadband) measurements related through Monitoring changes in UV-B radiation 27 calibration to four instruments which had been successfully intercompared in Garmisch-Partenkirchen in summer 1993. Six of the sites were the NSF sites, four were in Australia and run by the Australian Radiation Laboratory, one was at Lauder in New Zealand, and one at Garmisch-Partenkirchen in Germany. The three Northern Hemisphere sites covered latitudes from 32 to 71° N, and the nine Southern Hemisphere sites ranged from 12 to 90° S.

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