convert_ghg_unit: convert_ghg_unit

In aelab: Data Processing for Aquatic Ecology

convert_ghg_unit

Description

Convert a greenhouse gas (GHG) flux value (or a character string containing one or more numeric values, e.g. "0.002 +/- 0.003") to micrograms per square meter per hour.

Usage

convert_ghg_unit(
  input,
  ghg,
  mass = "µg",
  area = "m2",
  time = "hr",
  digits = 2,
  ratio = FALSE
)

Arguments

input	A single numeric value or a character string containing one or more numbers.
ghg	The molecular formula of the greenhouse gas: "co2", "ch4", or "n2o".
mass	Mass unit of the input flux. One of "mmol", "mg", "g", "ug" (micrograms), "nmol", "Mg", "umol" (micromoles), "mol". Default "ug".
area	Area unit of the input flux. One of "ha", "m2". Default "m2".
time	Time unit of the input flux. One of "yr", "day", "hr", "sec", "min". Default "hr".
digits	Number of decimal places to round to. Default 2.
ratio	Logical. If TRUE, apply an elemental-ratio correction (C-basis for CH4, N-basis for N2O). Default FALSE.

Details

Numeric values embedded in a string (e.g. mean +/- SD notation) are each converted individually and the surrounding text is preserved. Commas are treated as decimal separators.

Value

A named list with value (converted string) and unit, or "EMPTY" for missing/non-numeric input.

Examples

convert_ghg_unit(97, ghg = "ch4", mass = "mg", area = "m2", time = "hr")

aelab documentation built on Feb. 23, 2026, 5:07 p.m.