格陵兰中部冰芯重建的温度 8.2千年事件 是发生在8,200年之前，或者说公元前6,200年的全球气温突然下降。持续了2-4个世纪。比之前的新仙女木期 的降温要温和，但是比之后的小冰河期 降温要猛烈得多。8.2千年事件是全新世气候最佳期 的一个意外。在这一事件中，大气中的甲烷下降了80 ppb或者说15%[ 1]
1960年，瑞士植物学家Heinrich Zoller [ 2] Finse event [ 3] [ 4]
最强的证据出自北大西洋地区；气候的突然转折清楚地记录在格陵兰的冰芯与北大西洋的沉积物中[ 5] [ 6] [ 7] [ 8] [ 9]
8.2千年事件可能是北美的勞倫臺德冰蓋 Ojibway冰融湖 与Agassiz冰融湖 突然崩溃注入了北大西洋[ 10] [ 11] [ 12] Missoula洪水 ，产生了Channeled scablands与哥伦比亚河 盆地）。冰融水的冲击影响了北大西洋的溫鹽環流 ，降低了向北的热量输送，造成北大西洋降温。降温幅度为1-5 °C。在格陵蘭，這一事件開始於西元前6225±30年，20年內降溫3.3 °C，最冷时段持续了60年，总持续150年[ 1] 印度尼西亚 的古珊瑚礁钻探取样表明，热带地区降温了3 °C[ 13] 2 在三百年时间里下降25ppm[ 14]
北非变得更为干旱。东非经历了5个世纪的大旱。在西亚，特别是美索不达米亚 ，造成了300年的干旱寒冷，迫使当地人发展了灌溉农业、城市与阶级的出现。但是这些多世纪跨度的变化难以与格陵兰100多年的冰芯数据直接关联起来。
最初的冰融水冲击造成了海平面上升了0.5-4米。根据对冰盖与冰融湖的体积的估计，造成了0.4-1.2米的海平面上升。根据现代河流三角洲之下沉积物的分析，8.2千年事件造成了冰后海平面正常上升之外的额外的2-4米升高[ 15]
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