| UVA {photobiologyWavebands} | R Documentation |
Constructor of ultraviolet-A waveband
Description
Wavelength-range definitions for ultraviolet-A (UV-A) radiation, by default according to ISO or as commonly used in different application areas.
Usage
UVA(std = "ISO")
UVA1(std = "CIE")
UVA2(std = "CIE")
UVAsw(std = "plants")
UVAlw(std = "plants")
UVAsw(std = "plants")
Arguments
std |
a character string |
Details
Implemented definitions. UV-A according to CIE and ISO standards: 315-400 nm. UV-A according to common non-standard practice: 320-400 nm. UV-A2 according to CIE report 134/1: 315-340 nm. UV-A1 according to CIE report 134/1: 340-400 nm. UV-Asw according to non-standard use possibly suitable for plants: 315-350 nm. UV-Alw according to non-standard use possibly suitable for plants: 350-400 nm.
Value
A waveband object defining a wavelength range.
Note
The non-standard definitions of UV-A and UV-A2 using 320 nm as limit should not be used in any new publications or work as they deviate from the internationally recommended practice. Their continued use leads to confusion. Their inclusion in this package is to allow calculations needed to compare new results and methods against old publications. UV-A1 and UV-A2 definitions are in wide use in medicine, but not yet standardized. Recent research on the plant photoreceptor UVR8 suggests that UV-A1 and UV-A2 bands are also relevant to plants (Rai et al., 2021). UV-Alw and UV-Asw have been used for plants, but UV-A1 and UV-A2 seem now preferable.
References
Aphalo, P. J., Albert, A., Björn, L. O., McLeod, A. R., Robson, T. M., Rosenqvist, E. (Eds.). (2012). Beyond the Visible: A handbook of best practice in plant UV photobiology (1st ed., p. xxx + 174). Helsinki: University of Helsinki, Department of Biosciences, Division of Plant Biology. ISBN 978-952-10-8363-1 (PDF), 978-952-10-8362-4 (paperback). Open access PDF download available at doi:10.31885/9789521083631.
CIE (1999) 134/1 TC 6-26 report: Standardization of the Terms UV-A1, UV-A2 and UV-B. https://cie.co.at/publications/cie-collection-photobiology-photochemistry-1999
Rai N, Morales LO, Aphalo PJ (2021) Perception of solar UV radiation by plants: photoreceptors and mechanisms. Plant Physiology 186: 1382–1396. doi:10.1093/plphys/kiab162
See Also
Other unweighted wavebands:
Blue(),
Far_red(),
Green(),
IR(),
Orange(),
Purple(),
Red(),
UVB(),
UVC(),
UV(),
VIS(),
Yellow()
Examples
UVA()
UVA("none")
UVA("ISO")
UVA("CIE")
UVA1()
UVA1("CIE")
UVA2()
UVA2("CIE")
e_irrad(sun.spct, UVA()) # W m-2
e_irrad(sun.spct, UVA1()) # W m-2
e_irrad(sun.spct, UVA2()) # W m-2