mˈɛltwɔːɾɚ pˈʌls wˈʌn ˈeɪ əkˈɜːd ɪn ɐ pˈiəɹɪəd ʌv ɹˈaɪzɪŋ sˈiː lˈɛvəl ænd ɹˈæpɪd klˈaɪmət tʃˈeɪndʒ, nˈoʊn æz tˌɜːmᵻnˈeɪʃən ˈaɪ, wˌɛn ðə ɹᵻtɹˈiːt ʌv kˌɑːntɪnˈɛntəl ˈaɪs ʃˈiːts wʌz ɡˌoʊɪŋ ˌɔn dˈʊɹɹɪŋ ðɪ ˈɛnd ʌvðə lˈæst ˈaɪs ˈeɪdʒ.
Meltwater pulse 1A occurred in a period of rising sea level and rapid climate change, known as Termination I, when the retreat of continental ice sheets was going on during the end of the last ice age.