Sea Ice Charts of the Russian Arctic in Gridded Format, 1933-2006, Version 1

The Arctic and Antarctic Research Institute (AARI) in St. Petersburg, Russia, produces sea ice charts for safety of navigation in the polar regions and for other operational and scientific purposes. Arctic charts from 1933 through 2006 are collected in this data set. Chart frequency and spatial coverage varies, but charts were compiled every 10 days during the navigation season, and monthly for the rest of the year, over most of the series. There is a gap with no charts from 1993 through 1996. Chart coverage focuses on the Northern Sea Route, although later charts extend into the central Arctic.The charts were compiled from a variety of data sources, with heavy reliance on regular reconnaissance flights for most of the series until 1992.俄罗斯圣彼得堡的北极与南极研究所（Arctic and Antarctic Research Institute, AARI）致力于编制海冰图，服务于极地航行安全保障及其他业务与科研需求。本数据集收录了1933年至2006年的北极海冰图。海冰图的更新频次与空间覆盖范围存在一定差异，在多数采集周期内，航行季每10天编制一次，其余月份每月编制一次。1993年至1996年期间存在无海冰图的资料断档。海冰图的覆盖范围以北方海航道（Northern Sea Route）为核心，后期编制的海冰图则延伸至北极中部区域。该数据集的海冰图基于多种数据源编制，在1992年之前的大部分采集周期中，主要依赖常规侦察飞行获取相关数据。