index_arguments.rainy_season_dur: arguments for index rainy_season_dur

In Climandes/ClimIndVis: Calculation, verification and visualisation of climate indices

Description

arguments for index rainy_season_dur

Usage

## S3 method for class 'rainy_season_dur'
index_arguments(
  climindvis,
  rs_method,
  days,
  dd_th = 1,
  nval = NA,
  trend = FALSE,
  NAmaxTrend = 20,
  NAdays = 0,
  ...
)

Arguments

climindvis	Object of type climindvis as returned by make_object which must contain the variable precipitation (prec)
dd_th	Dry day threshold
trend	Logial (or character). Calculates trends with a predefined method for the chosen index. For information on default method, see trend_methods. You can chose to calculate a non-parameteric trend, by setting trend to a character string "MannKendall". This calculates a TheilSen slope and MannKendall test. Default = FALSE.
NAmaxTrend	Maximum number of years in time series of index which are missing values. Value between 0 (=0%); no years with missing values allowed) and 100 (=100%); all years can be missing values). If exceeded, the trend is set to NA for the respective grid point/station. Note that the value is relative to the length of the time series. Default = 20 (20%).
NAdays	Number of NA days allowed per decade for index <<sos>>. Default=0.
rs_method:	method for calculation of index (further indicator arguments for each rs_method are given in brackets and defined below, arguments without default that have to be provided are in bold font ): garcia (nval): sum(3days) > 20mm and maximum number of consecutive dry days within the next 30 days <=10 (definition from Garcia et al.,2007 ) gurgiser (nval): sum(7days) > 10mm and number of consecutive wet days within the next 30 days > 10 (definition from Gurgiser et al.,2017)
th	Threshold for precipitation sum of <<days>> consecutive days
end	rs_method for end date if different than for start. For Default=NULL same method is used for end and for start.

DETAILS

The duration of the rainy season is calculated using the same functions for the start and end of the rainy season. The arguments for the aggregations have to be provided differently. <<day start>> indicates the first day of the calculation for the start of the rainy season and <<day end>> the first day of the time series for calculating the end of the rainy season. nstart/nend are the number of days after day_start/day_end to consider for the calculation (defaults to 300days). If the criterion for start or end are not met the value of the respective year is set to NA.

Examples

data(object_st) # load example objects
calc_index(object_st,index="rainy_season_start",aggt="dates",start_days="0000-08-01",end_days="0000-03-01",rs_method="gurgiser")

Climandes/ClimIndVis documentation built on Oct. 24, 2021, 10:52 a.m.