key_dates: Locate stratification or ice on/off dates

In aemon-j/gotmtools: Tools to work with GOTM input data and also process the output data

Locate stratification or ice on/off dates

Description

Calculate dates of stratification or ice on/off dates. Ice on/off calculation is based on Pierson et al. (2011) formula when the upper sensor records a temperature of at least -0.1C below that of the bottom sensor. Stratification is based on the opposite principle i.e when there is a difference of +0.1C between the top and bottom sensor.

Usage

key_dates(data, type = "strat", days = 7, Tmin = 0.1, tz = "UTC")

Arguments

data	dataframe; Water temperature profile data in the long form as loaded in using load.obs
type	character; Which dates to caclulate, either ice or stratification on/off. Defaults to 'strat'.
days	numeric; no. of days of consecutive days before identifying a break. Defaults to 7.
Tmin	numeric; Minimum temperature as a cutoff point for identifying breaks. Defaults to 0.1
tz	Timezone string to be supplied to as.POSIXct. Defaults to 'UTC'. This often can be left to the default unless timezone support is specifically required.

Value

vector with dates of stratification or ice on/off

aemon-j/gotmtools documentation built on April 12, 2024, 4:35 p.m.