a_water: Absorption coefficient of pure water
Description Usage Arguments Details Value References See Also Examples
Description
This function calculates the temperature and salinity dependent absorption of pure (saline) water.
Usage
1 | a_water(lambda, S = 0, Tc = 20)
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Arguments
lambda |
Wavelength in vacuum (nm). |
S |
Salinity [0,40] (parts per thousand). |
Tc |
Temperature [0,30] (ºC). |
Details
The harmonized pure water absorption data between 300 and 4000 nm from Röttgers et al. (2011) and the absorption derivatives with respect to temperature and salinity (Röttgers, 2010) are used to calculate the absorption at the desired conditions, following Röttgers et al. (2011). For more information see ?a_water_wopp.
Coefficients are linear interpolated from tabulated values (2 nm steps) to the requested wavelength.
Value
A numeric vector with the absorption coefficient (1/m) of pure (saline) water.
References
Röttgers, R. 2010. Measurements of inherent optical properties of pure water. Technical note, STSE-WaterRadiance D5, ESA.
Röttgers, R.; Doerffer, R.; McKee, D.; Schönfeld, W. 2011. The Water Optical Properties Processor (WOPP). Pure water spectral absorption, scattering, and real part of refractive index model. Algorithm Theoretical Basis Document.
See Also
Examples
1 2 | # Retrieve the absorption of average seawater in the visible range:
a_water(lambda = 400:700, S = 34.72, Tc = 3.5)
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