lutzpocflux 0.1.5

Calculate POC Export flux, as Lutz et al. 2007

Lutz POC FLux

LutzPOCFlux is a Python library for calculating POC export flux as detailed in Lutz et al. 2007.

Installation

Use the package manager pip to install LutzPOCFlux.

pip install lutzpocflux

Numpy is the only dependency. Other parts of the process, such as reading HDF files and plotting results are expected to be done with other packages.

Usage

There is a convenience class for calculating Flux given a list of annual npp arrays and a ze array (or float value).

This handles

• Creation of the SVI array
• Creation of the total average array
• Calculation of the p ratio_ze
• Application of the ratio to the total average array

from lutzpocflux import MakeFlux
mf = MakeFlux(ze=ze, annual_npp=npp_list)
flux = mf.get_flux()

Alternatively the calculated flux ratio can be used against another npp array provided seperately.

from lutzpocflux import MakeFlux
mf = MakeFlux(ze=4000.0, annual_npp=npp_list, npp=some_other_npp)
flux = mf.get_flux()

Or the equations can be used on their own.

from lutzpocflux.equations import (
    prd_f,
    rld_f,
    prr_f,
    pratioze_f,
)

# Assuming you already have an average npp and SVI layer, you can
# calculate individual parameters
rld = rld_f(svi)
prd = prd_f(svi)
prr = prr_f(svi)

# ze can be a 2D array of the same shape as the npp input arrays or a float value
pratio = pratioze_f(prd,ze,rld,prr)

# Now use the pratio to calculate your export npp given your choice of npp array:
npp_flux = npp * pratio

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

Please make sure to update tests as appropriate.

Acknowledgments

Results were tested agains the R package here

License

MIT