Field

HadISST1 ice
Monthly version of HadISST sea ice component
X axis: whole world in 360 1.00° steps, first point at 179.50° W, last point at 179.50° E
Y axis: regular grid with 180 -1.00° steps, first point at 89.50° N, last point at 89.50° S

Monthly data available from Jan1870 to May2020 (1805 months)
Variable sic (Monthly 1 degree resolution sea ice concentration) in 1
Full metadata.

Get grid points, average area or generate subset

Mask:	no mask mask1.txt mask6.txt   add a mask to the list
Latitude:	°N - °N
Longitude:	°E - °E
Boundaries:	halfway grid points interpolated
Make:	average max min set of grid points subset of the field
Demand at least:	% valid points in this region

Create a field with lower time resolution

New time scale:	annual (Jul-Jun) annual (Jan-Dec) biannual seasonal
New variable:	mean sd sum sum above sum below number min time of min max time of max first time last time of ice
Threshold:	no cut less than greater than 1 percentile normal 1971-2000
Minimum:	% valid data
First apply:	-month running mean
Missing data:	ignore, climatology, trend, persistence.

Create a field with lower spatial resolution

Average over blocks of longitude and latitude grid cells

getfieldtype: please ask me to add "sic" to the lists in getfieldtype

Construct a statistical forecast model from this field

(c) Crown copyright 2006, data supplied by the Met Office. The UKMO license does not allow us to redistribute this file. Please consult their website for further information.