calculate_sp: Biochemical Energy
In grahamstewart12/tidyflux:
Description
Usage
Arguments
Details
Value
References
Description
Radiant energy absorbed in photosynthesis or heat release by respiration
calculated from net ecosystem exchange of CO2 (NEE).
Usage
1
calculate_sp(x, alpha = 0.422)
Arguments
x
Net ecosystem exchange (µmol CO2 m-2 s-1).
alpha
Energy taken up/released by photosynthesis/respiration per mol
CO2 fixed/respired (J umol-1).
Details
The following sign convention is employed: NEE is negative when
carbon is taken up by the ecosystem. Positive values of the resulting
biochemical energy mean that energy (heat) is taken up by the ecosystem,
negative ones that heat is released. The value of alpha is taken from Nobel
1974 (see Meyers & Hollinger 2004).
Value
Sp -
biochemical energy (W m-2)
References
Meyers, T.P., Hollinger, S.E. 2004: An assessment of storage terms in the
surface energy balance of maize and soybean. Agricultural and Forest
Meteorology 125, 105-115.
Nobel, P.S., 1974: Introduction to Biophysical Plant Physiology. Freeman,
New York.
grahamstewart12/tidyflux documentation built on June 4, 2019, 7:44 a.m.
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Description Usage Arguments Details Value References
Description
Radiant energy absorbed in photosynthesis or heat release by respiration calculated from net ecosystem exchange of CO2 (NEE).
Usage
1 | calculate_sp(x, alpha = 0.422)
|
Arguments
x |
Net ecosystem exchange (µmol CO2 m-2 s-1). |
alpha |
Energy taken up/released by photosynthesis/respiration per mol CO2 fixed/respired (J umol-1). |
Details
The following sign convention is employed: NEE is negative when carbon is taken up by the ecosystem. Positive values of the resulting biochemical energy mean that energy (heat) is taken up by the ecosystem, negative ones that heat is released. The value of alpha is taken from Nobel 1974 (see Meyers & Hollinger 2004).
Value
Sp - |
biochemical energy (W m-2) |
References
Meyers, T.P., Hollinger, S.E. 2004: An assessment of storage terms in the surface energy balance of maize and soybean. Agricultural and Forest Meteorology 125, 105-115.
Nobel, P.S., 1974: Introduction to Biophysical Plant Physiology. Freeman, New York.
R Package Documentation
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Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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