Mesoscale Nowcasting of Sea Ice Movement through the Bering Strait with a Description of Major Driving Forces

摘要: Abstract Surface atmospheric pressure data from a triangular station network surrounding the Bering Strait are used to calculate hypothetical geostrophic wind velocities. Net daily sea ice movement is derived visible and infrared NOAA satellite imagery for November through May, 1974 1984. These historical ice-motion wind-velocity develop an empirical 12-h advance forecast (nowcast) model with all-weather capabilities. A necessary outgrowth of this study has been identification classification three modes two immobilization according their major driving forces. The first ice-movement mode Chukchi Sea requiring minimum northeasterly 12 m s−1. second third represent Sea. Mode 2 driven by preexisting north-flowing ocean current that offsets weak winds northeast. large...