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河北省黄骅市关家堡孔（ＨＧ１），孔深４１．３ｍ，地层连续、化石丰富、分辨率高，其所含微体化石，清楚地揭示了华北平原４万年以来两次大的突发性升温事件，据研究这两次升温事件在时序上与全球性的升温事件是同步的：第一次由冷变暖起始于４００００ａＢ．Ｐ．（沧州海进期）；第二次为１００００ａＢ．Ｐ．（天津海进期）。第一次升温事件（沧州海进期）华北平原的年平均温度比今高７℃左右；比其以前的降温事件期（沧州海进与白洋淀海进之间的海退期）至少高１３℃，如此大幅度的升温事件可能是受西太平洋赤道暖池扩张影响的结果。第一次升温事件期间存在着一个短暂的变冷事件。第二次升温事件期（天津海进期），其年平均温度比今高２～３℃。
HG1, Huanghua City, Hebei Province, with a hole depth of 41.3m, has continuous stratigraphy, abundant fossils and high resolution, and contains micro-fossils that clearly reveal two major bursts in the North China Plain over 40,000 years It is reported that these two warming events are in time series with the global warming event: the first cold warming begins at 40000 aB. P. (Cangzhou sea progress); the second is 10000aB. P. (Tianjin sea phase). The first annual warming event (Cangzhou sea phase) North China Plain annual average temperature is about 7 ℃ higher than this; than its previous cooling event period (Cangzhou sea and Baiyangdian sea into the sea between the retreat) at least 13 ℃ , Such a substantial warming event may be the result of the expansion of the equatorial warm pool in the western Pacific. There was a brief cooling incident during the first warming event. The second warming event (Tianjin sea phase), the annual average temperature higher than today 2 ~ 3 ℃.