Global cumulative glacier mass change for (whole period) 1801 ā2010 and (inset) 1961ā2010. The cumulative estimates are all set to zero mean over 1986ā2005. Glacial lake volume change (absolute magnitude change), 1990-1999 to 2015 -2018 (Shugar et al, Nature Climate Change, 2020). The research question posed by this study is to what extent BC reduction policies undertaken by South Asian cā¦