![\"Sea](\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/181106_181121_NH_seaice_anim.gif\")
<\/a>Daily sea ice concentration derived from AMSR2 data, 06-21 November [click to play animation | MP4<\/strong><\/a>]<\/p><\/div>After increasingly colder air began moving from eastern Nunavut across Hudson Bay beginning on 06 November (surface analyses<\/strong><\/a>), the daily sea ice concentration as derived from GCOM-W1 AMSR2 data (source<\/strong><\/a>) began to increase in the northern half of Hudson Bay (above)<\/strong><\/em> — especially after 15 November<\/strong><\/a> once mid-day (18 UTC) temperatures colder than -20\u00baF were seen at reporting stations along the northwest coast.<\/p>\n A sequence of daily Terra\/Aqua MODIS True Color Red-Green-Blue (RGB) images (source<\/strong><\/a>) showed signatures of the increasing of ice coverage.<\/p>\n Daily Terra\/Aqua MODIS True Color RGB images, 06-21 November [click to play animation | MP4<\/strong><\/a>]<\/p><\/div>A toggle between Terra MODIS True Color and False Color RGB images on 21 November (below)<\/strong><\/em> confirmed that much of the northern half of Hudson Bay contained ice — snow\/ice (as well as ice crystal clouds) appear as darker shades of red in the False Color image (in contrast to the cyan shades of supercooled water droplet clouds).<\/p>\n Terra MODIS True Color and False Color RGB images on 21 November [click to enlarge]<\/p><\/div>19 November maps of Ice Concentration, Ice Stage and Departure from Normal via the Canadian Ice Service<\/strong><\/a> (below)<\/strong><\/em> further characterized this ice formation, which was ahead of normal for the central portion of Hudson Bay.<\/p>\n<\/a><\/a>