The phrase "glacier advances" refers to the movement or forward progress of a glacier, meaning that it is growing or expanding in size. Full definition
I haven't made any arguments on glacier advance or decline with respect to my position on global warming. (judithcurry.com)
May be you mean that strip bark is basically caused by extreme snow conditions and glacier advances occur during such times? (climateaudit.org)
Because glaciers move slowly, however, a time lag can occur between the changing climatic conditions and the resulting glacier advance or retreat. (nsidc.org)