UV hazard on a summer’s day under Mediterranean conditions, and the protective role of a beach umbrella

Grifoni, Daniele; Carreras, Giulia; Sabatini, Francesco; Zipoli, G.

doi:10.1007/s00484-005-0278-y

Cited by 24 publications

(22 citation statements)

References 20 publications

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“…The spectroradiometer carried out scans of global and diffuse irradiance from 280 to 400 nm with 5 nm steps (Grifoni et al 2005) while simultaneous global and diffuse PAR measurements were performed by means a Licor 190 radiometer; spectral data with a 1 nm resolution were obtained via interpolation of measured values, and the error of this approximation was quantified in the order of 5% (Webb et al 1999). Measurements of diffuse irradiance were taken, according with Kasten (1986), using a small disc that shadowed the diffuser.…”

Section: Site Description and Weather Conditionsmentioning

confidence: 99%

Row orientation effect on UV-B, UV-A and PAR solar irradiation components in vineyards at Tuscany, Italy

Grifoni¹,

Carreras²,

Zipoli³

et al. 2008

Int J Biometeorol

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Besides playing an essential role in plant photosynthesis, solar radiation is also involved in many other important biological processes. In particular, it has been demonstrated that ultraviolet (UV) solar radiation plays a relevant role in grapevines (Vitis vinifera) in the production of certain important chemical compounds directly responsible for yield and wine quality. Moreover, the exposure to UV-B radiation (280-320 nm) can affect plant-disease interaction by influencing the behaviour of both pathogen and host. The main objective of this research was to characterise the solar radiative regime of a vineyard, in terms of photosynthetically active radiation (PAR) and UV components. In this analysis, solar spectral UV irradiance components, broadband UV (280-400 nm), spectral UV-B and UV-A (320-400 nm), the biological effective UVBE, as well as the PAR (400-700 nm) component, were all considered. The diurnal patterns of these quantities and the UV-B/PAR and UV-B/UV-A ratios were analysed to investigate the effect of row orientation of the vineyard in combination with solar azimuth and elevation angles. The distribution of PAR and UV irradiance at various heights of the vertical sides of the rows was also studied. The results showed that the highest portion of plants received higher levels of daily radiation, especially the UV-B component. Row orientation of the vines had a pronounced effect on the global PAR received by the two sides of the rows and, to a lesser extent, UV-A and UV-B. When only the diffused component was considered, this geometrical effect was greatly attenuated. UV-B/PAR and UV-A/PAR ratios were also affected, with potential consequences on physiological processes. Because of the high diffusive capacity of the UV-B radiation, the UV-B/PAR ratio was significantly lower on the plant portions exposed to full sunlight than on those in the shade.

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Section: Site Description and Weather Conditionsmentioning

confidence: 99%

Row orientation effect on UV-B, UV-A and PAR solar irradiation components in vineyards at Tuscany, Italy

Grifoni¹,

Carreras²,

Zipoli³

et al. 2008

Int J Biometeorol

Self Cite

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“…For example, it is well known that prolonged exposure to UV on snow surfaces leads to photokeratitis. Grifoni et al [13] reported a significant contribution of ground albedo and SEA in determining the erythemal UVBE irradiance.…”

Section: Introductionmentioning

confidence: 99%

The enhancement of biological ocular UV radiation on beaches compared to the radiation on grass

Liu

Wang

Gao

et al. 2014

Journal of Photochemistry and Photobiology B: Biology

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“…We decided to use the umbrella to quantify the contribution of the irradiance (diffused and reflected component) coming from the surrounding environment on a shaded surface maintaining constant the field of view (FOV) of the sky. The use of the umbrella was justified to reproduce shading studied in a previous experiment and not because usually used in mountainous environment (Grifoni et al 2005).…”

Section: Experimental Designmentioning

confidence: 99%

“…In a recent paper (Grifoni et al 2005) the UV radiative regime of a Mediterranean beach was investigated. The global and diffuse components of UVBE reaching tilted surfaces were illustrated.…”

Section: Introductionmentioning

confidence: 99%

UV hazard on Italian Apennines under different shading and ground cover conditions during peak tourist seasons of the year

Grifoni¹,

Carreras²,

Sabatini³

et al. 2006

International Journal of Environmental Health Research

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In solar UV irradiance monitoring and forecasting services UV information is generally expressed in terms of its effect on erythema and referred to horizontal surface. In this work we define the UV radiative regime, in terms of biologically effective UV irradiance (UVBE) for skin and eye, under full sun and shaded conditions, over a mountainous tourist area of central Italy by means of two all-day measurements (summer and early spring) with different ground albedo (grass and snow cover respectively). UV irradiance was monitored on tilted surfaces (the most frequent for people standing and walking). Results show the significant contribution of ground albedo and sun position in determining the incident UVBE irradiance. On early spring days the UVBE irradiance measured on horizontal surface was much lower than on tilted ones; the opposite condition was observed in summer. The highest UVBE irradiance values, in particular conditions of sun elevation and ground cover, were reached in periods different from the summer both in full sun and shaded condition.

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UV hazard on a summer’s day under Mediterranean conditions, and the protective role of a beach umbrella

Cited by 24 publications

References 20 publications

Row orientation effect on UV-B, UV-A and PAR solar irradiation components in vineyards at Tuscany, Italy

Row orientation effect on UV-B, UV-A and PAR solar irradiation components in vineyards at Tuscany, Italy

The enhancement of biological ocular UV radiation on beaches compared to the radiation on grass

UV hazard on Italian Apennines under different shading and ground cover conditions during peak tourist seasons of the year

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