Dosimeter for the measurement of plant damaging solar UV exposures

Turner, Joanna; Parisi, Alfio V.; Turnbull, David

doi:10.1016/j.agrformet.2009.03.002

Cited by 13 publications

(4 citation statements)

References 22 publications

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“…164 While these devices are no substitute for spectroradiometers, they can provide useful and inexpensive estimates of exposure to UV radiation for certain applications. 165 Current polymers have wavelength sensitivities similar to common plant biological weighting functions 166,167 and have been developed with the inclusion of neutral density filters allowing estimates of exposure to UV radiation over periods of days to weeks. 168 Provided these dosimeters are calibrated against spectroradiometers at the field locations where they are to be deployed, they may have particular utility for decomposition studies and in areas under the ozone 'hole' where long-term continuous measurement of the incident UV radiation on standing and ground level plant litter is needed.…”

Section: Progress In Technical and Experimental Issuesmentioning

confidence: 99%

Solar ultraviolet radiation and ozone depletion-driven climate change: effects on terrestrial ecosystems

Bornman

Barnes

Robinson

et al. 2014

Photochem Photobiol Sci

189

137

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In this assessment we summarise advances in our knowledge of how UV-B radiation (280-315 nm), together with other climate change factors, influence terrestrial organisms and ecosystems. We identify key uncertainties and knowledge gaps that limit our ability to fully evaluate the interactive effects of ozone depletion and climate change on these systems. We also evaluate the biological consequences of the way in which stratospheric ozone depletion has contributed to climate change in the Southern Hemisphere. Since the last assessment, several new findings or insights have emerged or been strengthened. These include: (1) the increasing recognition that UV-B radiation has specific regulatory roles in plant growth and development that in turn can have beneficial consequences for plant productivity via effects on plant hardiness, enhanced plant resistance to herbivores and pathogens, and improved quality of agricultural products with subsequent implications for food security; (2) UV-B radiation together with UV-A (315-400 nm) and visible (400-700 nm) radiation are significant drivers of decomposition of plant litter in globally important arid and semi-arid ecosystems, such as grasslands and deserts. This occurs through the process of photodegradation, which has implications for nutrient cycling and carbon storage, although considerable uncertainty exists in quantifying its regional and global biogeochemical significance; (3) UV radiation can contribute to climate change via its stimulation of volatile organic compounds from plants, plant litter and soils, although the magnitude, rates and spatial patterns of these emissions remain highly uncertain at present. UV-induced release of carbon from plant litter and soils may also contribute to global warming; and (4) depletion of ozone in the Southern Hemisphere modifies climate directly via effects on seasonal weather patterns (precipitation and wind) and these in turn have been linked to changes in the growth of plants across the Southern Hemisphere. Such research has broadened our understanding of the linkages that exist between the effects of ozone depletion, UV-B radiation and climate change on terrestrial ecosystems.

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Section: Progress In Technical and Experimental Issuesmentioning

confidence: 99%

Solar ultraviolet radiation and ozone depletion-driven climate change: effects on terrestrial ecosystems

Bornman

Barnes

Robinson

et al. 2014

Photochem Photobiol Sci

189

137

View full text Add to dashboard Cite

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“…The response in the visible waveband is due to the phenothiazine, as polysulfone has been shown to have a negligible response above approximately 340 nm. The error associated with the spectral response is of the order of approximately 10.8% (20).…”

Section: Resultsmentioning

confidence: 99%

Potential dosemeter for quantifying biologically effective blue light exposures

Turnbull

Parisi

2011

Radiation Protection Dosimetry

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This paper reports on the development of a blue light (VIS(BL)) dosemeter. The VIS(BL) dosemeter is based on the combination of polysulfone and phenothiazine as a potential VIS(BL) dosemeter for population studies of exposures related to the blue light hazard. This research found that this combination of photosensitive chromophores reacts to both ultraviolet and visible wavelengths of the solar spectrum. Further to this, the majority of the ultraviolet wavelengths <380 nm can be filtered out with the use of a low-pass filter. It was found that a large change in optical absorbance at 437 nm occurred when the dosemeter was employed to quantify the solar blue light hazard exposures. Preliminary results indicate that this dosemeter saturates relatively slowly and is able to measure exposures equivalent to >1200 kJ m(-2) of blue light hazard weighted solar radiation.

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“…Filters could be used to further develop more accurate spatial distributions of plant canopy exposure in desired wavebands. Recent work with dosimeters has been carried out using a combination of polysulphone and a secondary material cast in film form, such as nalidixic acid [32]. This dosimeter has displayed a spectral response that extends into the UVA spectrum, and can be used to approximate the plant growth inhibition action spectrum [23].…”

Section: Combining All Techniquesmentioning

confidence: 99%

Solar UV exposures measured simultaneously to all arbitrarily oriented leaves on a plant

Parisi

Schouten

Downs

et al. 2010

Journal of Photochemistry and Photobiology B: Biology

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Cloud cover which is influenced by climate change, has a direct impact on the solar UV radiation incident on terrestrial ecosystems. In order to determine and evaluate the consequences associated with changes in solar UV radiation levels, research into the effects of solar UV radiation on different types of biota, such as plants is becoming increasingly significant. Therefore, a means of obtaining information on the solar UV radiation incident on plants is required. In this research, the spectral irradiances of the solar UV incident to the leaves on a plant were measured with a calibrated spectrometer. These spectra detail the correlation between solar UV irradiances with the inclination and orientation of each leaf, along with the effect of shading by other leaves. In order to measure the solar UVB exposures to plant leaves, polysulphone dosimeters were miniaturised to allow the measurement of UVB exposures to the leaves of smaller plants over the period of a day. For the cases of larger plants where exposure measurements were required over time intervals longer than the dynamic range of polysulphone, dosimeters based on polyphenylene oxide which has a dynamic range approximately five times longer than that of polysulphone were employed to measure the solar UVB exposures simultaneously on the leaves of a plant over a one week time period.

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Dosimeter for the measurement of plant damaging solar UV exposures

Abstract: Abstract

Cited by 13 publications

References 22 publications

Solar ultraviolet radiation and ozone depletion-driven climate change: effects on terrestrial ecosystems

Solar ultraviolet radiation and ozone depletion-driven climate change: effects on terrestrial ecosystems

Potential dosemeter for quantifying biologically effective blue light exposures

Solar UV exposures measured simultaneously to all arbitrarily oriented leaves on a plant

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