Global warming, from 55 million years ago a giant Comet-Earth, the Comet-IT information
According to the United Kingdom reported the daily mail, about 55 million years ago, the earth suddenly suffered a series of extreme global warming events, known as "the Paleocene-Eocene thermal maximum (PETM)". Scientists do not know exactly what causes this warm period, but the latest findings revealed the secret of the period, at present, the researchers discovered the Comet collision to Earth as the first direct evidence of the period.
In recent years, "the Paleocene-Eocene thermal event" becomes the one of the points of interest the scientists, is likely to be understood nowadays the best comparative examples of the impact of global warming, and even so, the cause of this warming event is still an unsolved mystery.
Rapid increase in carbon dioxide in the atmosphere during the PETM index, along with the global temperature rises to approximately 5-8, lasts for about 150,000 years. Although scientists know that carbon injection substances into the atmosphere can lead to temperature rises, but the mystery of the rising temperatures during the PETM is not confirmed.
They speculate that with a volcanic release of carbon and collision of celestial Earth, at present, the United States researchers at Rensselaer Polytechnic Institute to study the marine part of the Atlantic coastal plain, ocean marine areas is less than 200 meters from the land, the ocean extends to the hedexunhe all the way from Florida waters.
The region associated with the Paleocene-Eocene boundary, formed in large glacial movement between these two periods. Scientists find unique structures and small crystal ball pits, Morgan Challe, Director of the research (Morgan Schaller) pointed out that, if there is a small ball, which is usually accompanied with crystals and feature with hollow micro-crystals. Micro-crystal display unique inner textures, indicate that they are from the rapid Cold-hardening under high temperature conditions, and they are widespread in the ejected material.
There are small pits-ceramics, which are condensing them quickly through the strong evidence of the collision on the ground, based on the above characteristics, researchers say, they are terrestrial debris ejected during meteorite collision. The study results showed that a comet impact event occurred at the Paleocene-Eocene boundary.
Challe said, implying a celestial collision in Earth's sedimentary layers, for example: a space rock impact on Earth. Comet impact events and major climate changes will produce unexpected results.
地球升温，源自5500万年前一次巨大彗星撞击 - 地球,彗星 - IT资讯
据英国每日邮报报道，大约5500万年前，地球遭受一系列突然极端全球变暖事件，被称为“古新世-始新世极热事件(PETM)”。科学家并不确切知道何种原因导致这一温暖时期，但是最新一项发现揭晓了该时期的秘密，目前，研究人员发现了该时期彗星碰撞地球的第一直接证据。
近年来，“古新世-始新世极热事件”成为科学家关注的一个兴趣点，很可能是理解现今全球气温升高所产生影响的最佳对比实例，即使如此，导致这一气温升高事件的原因仍是一个未解谜团。
在PETM时期大气层二氧化碳指数快速升高，伴随着出现全球气温升高大约5-8摄氏度，持续大约15万年时间。虽然科学家知道大量碳喷射物质进入大气层可导致气温升高，但是PETM时期气温升高之谜并未证实。
科学家猜测这与火山释放碳物质和地外天体碰撞地球有关，目前，美国伦斯勒理工学院研究人员对大西洋海岸平原的海洋架部分进行了研究，海洋架是距离陆地不足200米的海洋区域，该海洋架从佛罗里达州海域一直向北延伸至赫德逊河。
该区域与古新世-始新世分界线有关，形成于这两个时期之间的大型冰川运动。科学家在这里发现具有独特结构和凹坑的小型晶体球，该项研究负责人摩根-沙勒(Morgan Schaller)指出，如果出现小球体，它们通常同时具有晶体和带有凹坑微晶体的特征。微晶体显示独特的内在纹理，表明它们从高温条件下快速冷淬，并且它们广泛存在于抛射物质之中。
微晶存在小凹坑，这是它们凝固状态快速穿行碰撞在地面的有力证据，基于以上特征，研究人员认为，它们是陨石碰撞过程中喷射的陆地残骸。这项研究结果表明，一次彗星碰撞事件出现在古新世-始新世分界线时期。
沙勒表示，这暗示着当时一次地外天体碰撞在地球沉积层，例如：一个太空岩石碰撞在地球上。彗星碰撞事件与重大气候变化同步发生将产生出乎意料的结果。