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在“侏罗系界线及地质事件国际学术研讨会”上,来自海内外的80多位科学家担忧地表示,多年之后,侏罗纪时期曾出现过阶段性的恶劣气候环境有可能再次出现。中科院南京地质古生物研究所研究员王永栋介绍,研究表明,由于二氧化碳浓度的急剧上升,侏罗纪时期的早侏罗世晚期、晚侏罗世都发生了非常严重的温室效应,直接导致温度升高、海平面上升、很多生物灭绝。专家介绍,过去40万年,二氧化碳在大气中的浓度约为180～280ppm(表示每百万个空气分子中二氧化碳分子的数量),但从工业革命后,二氧化碳浓度不断上升,到2004年已达到前所未有的379ppm。这个浓度已经是侏罗纪时期发生严重温室效应时二氧化碳浓度的1/4。专家表示,人类如果再任由二氧化碳的浓度如此增长
At the International Symposium on the Jurassic Boundaries and Geological Events, more than 80 scientists from home and abroad said with concern that many years later, the staged harsh climate in the Jurassic period is likely to reappear . Wang Yongdong, a researcher at Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, introduced the research shows that due to the sharp rise of carbon dioxide concentration, very Jurassic Jurassic Late Jurassic and Jurassic serious greenhouse effect occurred due to the rapid increase of carbon dioxide concentration, Sea level rises, many creatures are extinct. According to experts, over the past 400,000 years, the concentration of carbon dioxide in the atmosphere is about 180-280ppm (indicating the number of carbon dioxide molecules per million molecules of air). However, since the industrial revolution, the concentration of carbon dioxide has risen and reached the level of 2004 Unprecedented 379ppm. This concentration is already 1/4 of the carbon dioxide concentration at the time of the serious greenhouse effect in the Jurassic period. Experts say that humankind’s concentration of carbon dioxide will increase if so