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古新世末次高温期（ＬＰＴＭ）是始于５５．５Ｍａ、持续约１００～１４０ｋａ的短期变暖事件 ,属于晚古新世—早始新世时期的全球性温暖气候。古气候指标表明 ,高纬度气温在ＬＰＴＭ时可能达到新生代期间的最高值。陆地δ１８Ｏ记录显示出ＬＰＴＭ时期北美洲年平均气温（ＭＡ
The Paleocene last high temperature (LPTM) is a short-term warming event starting at 55.5 Ma for about 100-140 ka, belonging to the global warm climate of the Late Paleocene-Early Pliocene. Paleoclimate indicators show that high-latitude temperatures may reach the highest during the Cenozoic at LPTM. The δ18O record of the land shows the annual mean temperature in North America during the LPTM (MA