Keywords: Lgm ngrip o18 1.jpg Temperature curve of maximum of last glacial maximum LGM Y-axis is temperature related X axis time Up wermed down colder time is calendar years ago Based on NGRPIP oxygen isotope delta018 data Own 2007-12-21 Janne Naukkarinen Check categories 2009 November 3 fi wikipedia Viime_jääkauden_huippukohta 1 Ice age |