TSA_snow_cover: Find start and end date of snow cover
In geocryology/PermafrostTools: PermafrostTools

Description Usage Arguments Details Value Author(s) Examples

Give one data.frame of a location or a list of data.frames of multiple locations and the function returns the start and end date as well as the MDr in a output table

1 2	TSA_snow_cover(obs_stat, v1 = 0.1, v2 = 0.3, lengthsnow = 5, MDr.sd = 0.3)

`obs_stat`	One dataframe of one location or a list of dataframes of multiple locations. A dataframe needs at least the following columns: Location name as loc_name; Mean daily GST as agg_avg; Minimum daily GST as agg_min; Maximum daily GST as agg_max; Daily sd as agg_sd; Date as time (in POSIXct and the following format: YYYY-MM-DD)
`v1`	Max. daily standard deviation indicating snow for POSITIVE Ground Surface Temperature. Default is 0.1.
`v2`	Max. daily standard deviation indicating snow for NEGATIVE Ground Surface Temperature. Default is 0.3.
`lengthsnow`	Number of days that the snow cover should at least have to be selected as a valid snow cover. Default is 5 days
`MDr.sd`	Threshold for the mean daily standard deviation for a snow period.

At locations with perennial snow cover, the snow cover is splitted into water years periods.

Dataframe with fields: loc_name; Snow.Start; Snow.End; MDr

Thomas Knecht <t.knecht@hotmail.com>

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con <- dbpf_con()
BC_SO01_01 <- TSA_data_import(con, "BC16-SO01_01")
Snow_table <- TSA_snow_cover(BC_SO01_01, v1 = 0.1, v2 = 0.3, lengthsnow = 5, MDr.sd = 0.3)