ˈaɪs ʃˈiːt mˈɑːdəlɪŋ wˈɜːk sədʒˈɛsts ðætðɪ ɐbɹˈʌpt ˈɑːnsɛt ʌvðə bˈɑːlɪŋˈælɚɹˌɑːd bˈiːɐ mˌeɪhɐv tɹˈɪɡɚd ðə sˌɛpɚɹˈeɪʃən ʌvðə kˈɔːɹdɪlɚɹən ˈaɪs ʃˈiːt ænd lˈɔːɹəntˌaɪd ˈaɪs ʃˈiːt ænd ðɪ ˈoʊpənɪŋ ʌvðɪ ˈaɪsfɹˈiː kˈɔɹɪdˌoːɹ pɹədˈuːsɪŋ ɐ mˈeɪdʒɚ kˌɑːntɹɪbjˈuːʃən tə mˈɛltwɔːɾɚ pˈʌls wˈʌn ˈeɪ fɹʌmðə nˈɔːɹθ ɐmˈɛɹɪkən ˈaɪs ʃˈiːt.
Ice sheet modelling work suggests that the abrupt onset of the Bølling-Allerød (B-A) may have triggered the separation of the Cordilleran ice sheet and Laurentide Ice Sheet (and the opening of the ice-free corridor) producing a major contribution to meltwater pulse 1A from the North American ice sheet.