If the glacier surface is very cold, it may also receive some energy by latent heat transfer, through frosting of atmospheric moisture onto the glacier. (geosci.uchicago.edu)
shallow ice model ice model that explicitly includes latent heat transfer by meltwater (CHW is cryo - hydrologic warming). (realclimate.org)
When you and Ike began discussing the the Energy Imbalance and you mentioned the «missing heat», it brought back the question of what if there is an interruption to normal water vapor latent heat transfer and it is not corrected in the models? (realclimate.org)