Counter defines the center date of time period of observations upon which chart is based
(i.e. 1950, Mar 21-31). Use buttons [>>] and [<<]
to browse forward and backward in time. Use [Step]-menu to choose between
weekly, monthly, yearly and decadal step during browsing. Use button [2x1]
to switch to dual window mode to compare pairs of charts. You may also choose to browse statistics. Use [Scroll] checkbox to (dis)enable autoscrolling. Use
[time] checkbox to switch scrolling forward and backward in time. Use buttond [+] and [-]
to accelarate or slow down autoscrolling.
Given array is based on processing 10-days period Arctic and Antarctic Research Institute
(AARI) sea ice conditions charts prepared in World
Meteorological Organization SIGRID format (WMO, 1989) for 1953-1992 interval
separately for Arctic West and Arctic East (eastward to 110E). Layer of sea ice total concentration
is depicted in polar stereographical projection.
[AARI charts] |
[NIC charts] |
[AARI versus NIC charts] |
[Statistics based on AARI data] |