o2_unit_conv {presens}

Convert units of dissolved oxygen

Description

Given a measurement of dissolved O2, a list of commonly used units of oxygen partial pressures and concentrations are returned.

Usage

o2_unit_conv(o2 = 100, from = "percent_a.s.", to = "all", salinity = 35,
  temp = 25, air_pres = 1.013253)

Arguments

o2

a numeric vector of the O2 value(s). Default is 100.

from

a string describing the unit used to measure o2. Default is "percent_a.s." Options are:

percent_a.s. (percent air saturation)

percent_o2

hPa

kPa

torr

mmHg

inHg

mg_per_l

umol_per_l

ml_per_l

to

a single string either describing the unit to which the conversion should be conducted (options are the same as in from), or the string "all" to return all units.

salinity

salinity of water sample (psu). Default is 35 psu.

temp

temperature of water sample (°C). Default is 25 °C.

air_pres

pressure of air overlying water sample (bar). Default is 1.013253 bar.

Details

Conversions are based on relationships and values from the package marelac.

Author(s)

Matthew A. Birk, [e-mail]

Examples

o2_unit_conv(o2 = 50)
o2_unit_conv(o2 = 1:50, from = "umol_per_l", to = "ml_per_l", salinity = 0, temp = 10,
	air_pres = 1.2)
o2_unit_conv()[c('mmHg','kPa')]