Scroll time

Counter defines time period of observations upon which chart is based (i.e. 1973, Jan 04).  Use buttons [>>] and [<<] to browse forward and backward in time. Use [Step]-menu to choose between weekly, monthly and yearly step during browsing. 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.Use button [2x1] to switch to dual window mode to compare pairs of charts. 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 weekly USA National Ice Center (NIC)  sea ice conditions charts prepared in World Meteorologocal Organization SIGRID format (WMO, 1989) for 1973-1994 interval for Antarctic (all seas surrounding the continent south of 50S). Layer of sea ice total concentration is depicted in polar stereographical projection.
For further information about the source data please contact NSIDC. At AARI please contact Vasily Smolyanitsky (vms@aari.nw.ru).