• arclein
1935 Russian vessel travelled over ice-free region that today was still ice-covered just before the previous ice minimum in 2007. Source: Real Science.
1938 Huge melting of Arctic sea ice. Source: WUWT.
Arctic temperatures in the 1930s were warmer and the warming rate was higher than the rate seen at the end of the 20th century. Source: The Hockeyschtick.