photobiologySun (version 0.5.1)

four_days_1min.data: Ground level irradiance for wavelength bands

Description

Dataset containing mean values for observed terrestrial radiation for PAR, UV-B, UV-A2, UV-A1, blue, red, and far-red photon irradiances and global radiation energy irradiance. Values are summaries of 12 consecutive readings acquired once every 5 s. The data set covers 4 consecutive days with different cloud conditions.

Usage

four_days_1min.data

Format

A data frame with 24479 rows and 9 variables. variables.

Details

The variables are as follows:

• time_EEST POSIXct Local time according to EET coordinates.

• UTC POSIXct Local time according to UTC.

• solar_time numeric Local solar time (h)

• sun_elevation numeric Sun elevation above the astronomical horizon (degrees)

• PAR_umo numeric (umol m-2 m-2)

• PAR_diff_fr numeric Fraction of total downwelling PAR that is diffuse (/1)

• global_watt numeric Global radiation (W m-2)

• red_umol numeric Red () light (umol m-2 m-2)

• far_red_umol numeric Far red () light (umol m-2 m-2)

• blue_umol numeric blue light () (umol m-2 m-2)

• blue_sellaro_umol numeric blue light () (umol m-2 m-2)

• UVA_umol numeric UV-A radiation (315-400 nm) (umol m-2 m-2)

• UVA1_umol numeric UV-A1 radiation (340-400 nm) (umol m-2 m-2)

• UVA2_umol numeric UV-A2 radiation (315-340 nm) (umol m-2 m-2)

• UVB_umol numeric UV-B radiation (280-315 nm) (umol m-2 m-2)

• solar_disk factor Estimate of whether the solar disk was visible or occluded (visible, occluded)

These data are part of a much larger data set (Aphalo, 2023). height. Data collected with a Campbell Scientific CR6 datalogger, using analogue outputs from the sensors. Location: Viikki campus of the University of Helsinki. Coordinates: 60.226803 N, 25.019205 E. Same data were plotted in Fig. 1 of Sellaro et al. (2024).

References

Aphalo, Pedro J. (2023) High frequency weather data for Viikki, Helsinki, Finland. tools:::Rd_expr_doi("10.17605/OSF.IO/E4VAU").

Sellaro, Romina; Durand, Maaxime; Aphalo, Pedro J., Casal, Jorge J. (2024) Making the most of canopy light: shade avoidance under a fluctuating spectrum and irradiance. Journal of Experimental Botany, erae334. tools:::Rd_expr_doi("10.1093/jxb/erae334").

Examples

colnames(four_days_1min.data)
nrow(four_days_1min.data)
range(four_days_1min.data$time_EET)
where_measured(four_days_1min.data)
how_measured(four_days_1min.data)
what_measured(four_days_1min.data)
comment(four_days_1min.data)