predict_NH4: Predict NH4 concentration post-respiration

Description Usage Arguments Details Value Author(s) See Also Examples

Description

Predicts the [NH4+] of seawater after a defined amount of oxygen consumption.

Usage

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predict_NH4(o2_drop = 10, o2_unit = "percent_a.s.", o2_nh4_ratio,
  temp = 25, sal = 35, atm_pres = 1013.25)

Arguments

o2_drop

a numeric value or vector describing the change in O2. Default is 10.

o2_unit

a string describing the unit used to measure o2_drop. Default is "percent_a.s." Options are from conv_o2.

o2_nh4_ratio

molar ratio of O2 consumed to NH4+ produced.

temp

temperature (°C). Default is 25 °C.

sal

salinity (psu). Default is 35 psu.

atm_pres

atmospheric pressure (mbar). Default is 1013.25 mbar.

Details

Given a known amount of oxygen consumed and an estimated O:N ratio, the amount of NH4 produced can be estimated. Production or consumption of ammonium by "background" microbes or conversion of ammonium to nitrite and nitrate is ignored since bacteria in the respirometer are typically sought to be in low levels.

Value

The predicted NH4+ produced in mg/l.

Author(s)

Matthew A. Birk, matthewabirk@gmail.com

See Also

conv_o2, conv_NH4

Examples

1
predict_NH4(o2_drop = 25, o2_nh4_ratio = 10)


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