Snow and sea ice extent in Northern Hemisphere: https://svs.gsfc.nasa.gov/10850
Sea ice north vs. south: https://svs.gsfc.nasa.gov/3944
Glaciers and ice sheets: https://nsidc.org/cryosphere/glaciers/questions/types.html
Ice crystals: http://www.its.caltech.edu/~atomic/snowcrystals/ice/ice.htm
Introduction to stress and strain: http://www.antarcticglaciers.org/modern-glaciers/glacier-flow-2/glacier-flow-ii-stress-and-strain/
GRACE data and mass loss for Antarctica: https://svs.gsfc.nasa.gov/30880
https://www.nytimes.com/interactive/2017/10/26/climate/antarctica-glaciers-melt.html
https://www.nytimes.com/interactive/2017/climate/antarctica-virtual-reality.html
https://www.nytimes.com/interactive/2017/05/18/climate/antarctica-ice-melt-climate-change.html
https://www.nytimes.com/interactive/2017/12/05/climate/greenland-ice-melting.html
New research led by UW: https://www.washington.edu/news/2017/12/18/partnership-will-use-robotic-network-to-explore-antarctic-ice-shelves
Geoengineering Antarctica? https://www.theatlantic.com/science/archive/2018/01/a-new-geo-engineering-proposal-to-stop-sea-level-rise/550214/
Firn layer on an ice sheet: http://www.iceandclimate.nbi.ku.dk/research/drill_analysing/cutting_and_analysing_ice_cores/analysing_gasses/firn_zone/
Firn densification: http://www.iceandclimate.nbi.ku.dk/research/flowofice/densification/
What is a gigaton? https://www.washingtonpost.com/news/energy-environment/wp/2015/07/01/meet-the-gigaton-the-huge-unit-that-scientists-use-to-track-planetary-change/
Melt ponds: https://www.youtube.com/watch?v=UUoTDL99Mb4&feature=youtu.be
UCLA research on the Greenland Ice Sheet: https://www.youtube.com/watch?v=-EMCxE1v22I
NASA video about Greenland: https://www.youtube.com/watch?v=0S4T2Q8sBW8
Field work stories: https://nsidc.org/news/newsroom/expeditions.html
Greenland Today: https://nsidc.org/greenland-today/
Arctic sea ice news from NSIDC: http://nsidc.org/arcticseaicenews/
Polar Portal: http://polarportal.dk/en/home/