calcindices_temp: Calculate temperature-related indices for the eastern Bering...

In afsc-gap-products/coldpool: AFSC/RACE Groundfish Assessment Program EBS and NBS temperature products

Calculate temperature-related indices for the eastern Bering Sea shelf

Description

This routine replicates the primary mean temperature and area-below-x indices as found in the cold_pool_index data frame, but allows for user-specified variations.

Usage

calcindices_temp(
  datafile,
  maskpoly,
  select_years = NULL,
  cell_resolution = 5000,
  method = "ste",
  proj_crs = NULL,
  threshold = c(-1, 0, 1, 2),
  bbox = NULL,
  bottomvar = "gear_temperature",
  surfacevar = "surface_temperature"
)

Arguments

datafile	Full filename of .csv file holding point-sampled surface and bottom temperature data
maskpoly	String specifying masking polygon from akgfmaps::get_base_layers, or simple feature object to use as masking polygon
select_years	vector of years for which indices will be calculated
cell_resolution	resolution (m) to use for interpolation raster
method	fitting method to use for interpolation (see data2raster fittype parameter for options)
proj_crs	CRS to use for interpolation, or NULL to use coldpool:::ebs_proj_crs
threshold	vector of temperature threshold values (deg C) for which area-less-than-x indices will be calculated
bbox	Bounding box to use for interpolated raster (see data2raster)
bottomvar	Name of bottom temperaure variable column in the datafile, or NULL to skip calculation of bottom temperature metrics
surfacevar	Name of surface temperaure variable column in the datafile, or NULL to skip calculation of surface temperature metrics

Value

data frame with the following column YEAR: year of indices MEAN_GEAR_TEMPERATURE: mean interpolated and masked bottomvar MEAN_SURFACE_TEMPERATURE: mean interpolated and masked surfacevar MEAN_BT_LT100M: mean interpolated bottomvar within the intersection of the <100m survey strata and masked region AREA_LTE_X: total area (km^2) where temperature is less than X deg C

afsc-gap-products/coldpool documentation built on Sept. 14, 2024, 7:40 p.m.