“Climate Change: Glacier Mass Balance: NOAA Climate.gov.” Climate Change: Glacier Mass Balance | NOAA Climate.gov, 14 Feb. 2020, www.climate.gov/news-features/understanding-climate/climate-change-glacier-mass-balance.

Kornei, Katherine. “Melting Glaciers Are Filling Unstable Lakes. And They're Growing.” The New York Times, The New York Times, 2 Sept. 2020, www.nytimes.com/2020/09/02/science/global-warming-glacial-lakes.html.