Reasons that passive microwave data may not detect ice include the presence of thin, newly formed ice; the shift in albedo of actively melting ice; and atmospheric interference. (nsidc.org)
More surface warming than cloud - height warming is indicative of surface albedo change and / or fewer clouds and / or increase in solar «constant». (judithcurry.com)
These runs are examined for evidence of accelerated climate change associated with the removal of sea ice, particularly due to increasing surface albedo feedback. (gfdl.noaa.gov)