A small set of downwelling spectral irradiance measurements made at three
depths at Mare Chiaro in the Gulf of Naples, Italy. This is example
field data — a single site on particular days — provided to illustrate
working with measured spectra; it is not a general reference spectrum (cf.
the ASTM solar_spectra). Values are in micromol photons per
square metre per second per nm (umol/m^2/s/nm); wavelength bins are
approximately 5 nm wide.
Format
A data frame with 103 rows and 4 columns:
- wv
Bin-centre wavelength in nm.
- depth_0m
Irradiance at the surface (0 m depth).
- depth_5m
Irradiance at 5 m depth.
- depth_10m
Irradiance at 10 m depth.
Source
Field measurements of downwelling spectral irradiance at Mare Chiaro, Gulf of Naples, Italy, attributed to M. J. Bok and J. D. Kirwan (2021, unpublished data). The bundled object is regenerated from an explicitly labelled legacy canonical snapshot; original acquisition metadata and redistribution terms are not documented.
Examples
data(Naples)
irradiance2lux(Naples$depth_0m, Naples$wv, photonic = TRUE, molar_unit = "umol")
#> [1] 24725.63