met2model wrapper for SIPNET

Reads weather data from CF-formatted NetCDFs and writes it in the .clim format expected by SIPNET: a 14-column tab-separated table with no headers.

met2model.SIPNET(
  in.path,
  in.prefix,
  outfolder,
  start_date,
  end_date,
  overwrite = FALSE,
  verbose = FALSE,
  year.fragment = FALSE,
  ...
)

Arguments

in.path

location on disk where inputs are stored

in.prefix

prefix of input and output files,

outfolder

location on disk where outputs will be stored

start_date

the start date of the data to be downloaded (will only use the year part of the date)

end_date

the end date of the data to be downloaded (will only use the year part of the date)

overwrite

should existing files be overwritten

verbose

should the function be very verbose

year.fragment

the function should ignore whether or not the data is stored as a set of complete years (such as for forecasts).

...

Additional arguments, currently ignored

Value

a dataframe containing information about the files created

Details

The columns of the output file are:

  • Grid index. Always 0 from this function; PEcAn configures SIPNET not to use this.

  • 4-digit year

  • Day of year

  • Hour of day

  • Timestep size (days)

  • Air temperature (degrees C)

  • Soil temperature (degrees C)

  • PAR (mol/m2/hr)

  • Precip (mm)

  • VPD (Pa)

  • VPD of soil (Pa)

  • Canopy vapor pressure (Pa)

  • Wind speed (m/s)

  • Soil moisture (fraction of saturation). Always 0.6 from this function; PEcAn configures SIPNET to calculate it internally.

SIPNET does not allow missing values in its inputs. If the result contains NAs after conversion, no file is written and the process returns an error. To fix this, consider using a formal gap-filling method such as PEcAn.data.atmosphere::metgapfill() before calling met2model.

Author

Luke Dramko, Michael Dietze, Alexey Shiklomanov, Rob Kooper