photobiologySun (version 0.5.1)

ppfd_LICOR.data: Ground level solar PAR photon irradiance (measured)

Description

Dataset containing mean, maximum, minimum and standard deviation values for photosynthetically active radiation expressed as photon irradiance. Values are summaries of 12 consecutive readings acquired once every 5 s. The data set covers 17 consecutive days.

Usage

ppfd_LICOR.data

Format

A data frame with 24479 rows and 5 variables.

Details

The variables are as follows:

• time_EEST POSIXct Local time according to EET coordinates.

• UTC POSIXct Local time according to UTC.

• ppfd_mean numeric (umol m-2 m-2)

• ppfd_min numeric (umol m-2 m-2)

• ppfd_max numeric (umol m-2 m-2)

• ppfd_sd numeric (umol m-2 m-2)

These data are part of a much larger data set (Aphalo, 2023). Instrument used: LI-COR LI-190 quantum sensor, mounted on permanent tripod at approximately 2 m height. Data collected with a Campbell Scientific CR6 datalogger. Sensor connected through a LI-COR millivolt adaptor (604 ohm). Wavelength sensitivity range of the quantum sensor is 400 nm to 700 nm. Location: Viikki campus of the University of Helsinki. Coordinates: 60.226803 N, 25.019205 E.

References

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

https://www.licor.com/env/ https://www.campbellsci.com/

Examples

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