Surface temperature data GISS - NASA Goddard Institute of Space Studies HadCRU - Hadley Center / Climate Research Unit NCDC - NOAA National Climatic Data Center Satellite temperature data UAH - University of Alabama (v5.3) RSS - Remote Sensing Systems (v3.2) Arctic Sea Ice National Snow and Ice Data Center - Arctic sea ice news and analysis National Snow and Ice Data Center - Arctic sea ice data IARC-JAXA - Arctic sea ice extent