If a marginally snow-covered area warms, snow tends to melt, lowering the albedo, and hence leading to more snowmelt because more radiation is being absorbed by the snowpack (the ice–albedo positive feedback).
ɪf ɐ mˈɑːɹdʒɪnəli snˈoʊkˈʌvɚd ˈɛɹiə wˈɔːɹmz, snˈoʊ tˈɛndz tə mˈɛlt, lˈoʊɚɹɪŋ ðɪ ælbˈiːdoʊ, ænd hˈɛns lˈiːdɪŋ tə mˈoːɹ snˈoʊmɛlt bɪkˈʌz mˈoːɹ ɹˌeɪdɪˈeɪʃən ɪz bˌiːɪŋ ɐbsˈoːɹbd baɪ ðə snˈoʊpæk ðɪ ˈaɪs ælbˈiːdoʊ pˈɑːzᵻtˌɪv fˈiːdbæk.