Home — Time series: monthly integrated sea ice concentration, polar hole interpolated at KNMI

Time series

monthly integrated sea ice concentration, polar hole interpolated at KNMI

NH ice area from NSIDC Sea Ice Index v3.0, ice area [million km^2] integrated sea ice concentration, polar hole interpolated at KNMI, (eps, pdf, metadata, raw data, netcdf, DOS)

Annual cycles, computed with all data available (Jan-Dec: eps, pdf, raw data,. Jul-Jun: eps, pdf, raw data).

Jul-Jun annual cycle of integrated sea ice concentration, polar hole interpolated at KNMI

Jan-Dec annual cycle of integrated sea ice concentration, polar hole interpolated at KNMI

Anomalies with respect to the above annual cycle (eps, pdf, raw data, netcdf, analyse this time series)

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Select years:	-
Make index:
Filter adjacent months	filter cut-off value months requiring at least % valid data
Filter consecutive years:	filter cut-off value years requiring at least % valid data
Scale series:	Scale factor:
Time derivative:	using months
Shift:	Shift data by months.
Normalise:	Take anomalies and set standard deviation to one
	for each month separately
	for all months together

Select month:	Select all values in
Combine:	Combine with another timeseries to form a (normalised) index
Mask out:	Mask out based on another time series
Extend:	Extend with another time series
Noise:	Make 100 random series with the same mean, variance and autocorrelation

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Plot and fit distribution

First fill missing data:	ignore, climatology, trend, persistence.
Then apply:	-month running mean with direction
Then apply new time scale:
New variable:	of integrated sea ice concentration, polar hole interpolated at KNMI ice_area
Minimum:	% valid data
Threshold:

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