A supercritical carbon dioxide layer in the Hadean atmosphere for the origin of life?  

冥古宙大气中超临界二氧化碳层的存在对于生命起源的意义

作　　者：Yi-Liang Li Wei-Dong Sun Yu-Fen Zhao 李一良;孙卫东;赵玉芬(Department of Earth Sciences,the University of Hong Kong,Hong Kong,China;Institute of Oceanology,Center of Ocean Mega-Science,Chinese Academy of Sciences,Qingdao 266071,China;The Institute of New Pharmaceutical Technology,Ningbo University,Ningbo 315832,China)

机构地区：[1]Department of Earth Sciences,the University of Hong Kong,Hong Kong,China [2]Institute of Oceanology,Center of Ocean Mega-Science,Chinese Academy of Sciences,Qingdao 266071,China [3]The Institute of New Pharmaceutical Technology,Ningbo University,Ningbo 315832,China

出　　处：《Science Bulletin》2021年第12期1157-1159,M0003,共4页科学通报（英文版）

基　　金：supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB41000000 and XDA22050100);Qian Xuesen Laboratory,China Academy of Space Technology。

摘　　要：Zhang et al.[1]reported the first direct detection of the natural supercritical CO_(2)(scCO_(2);critical point:31.1℃and 72.9 atm)in a deep-sea hydrothermal system.In their study,they measured in situ the Raman bands of scCO_(2)bubbling from an approximately 95℃hydrothermal vent.The Raman spectra indicated that the scCO_(2)bubbles also trapped N2 and CH4 gases and unidentified organic carbons.This discovery suggests a scenario that a layer of scCO_(2)might have existed in the Hadean atmosphere between the young ocean and the gaseous CO_(2)-dominated upper layers.Such a layer of scCO_(2)in the atmosphere should have been highly active in trapping energetic small molecules and catalytic transition metals and polymerizing organic matters,thereby aiding the creation of a favorable planetary environment for prebiotic evolution toward life.

关 键 词：超临界二氧化碳 thereby BANDS 

分 类 号：P744[天文地球—海洋科学] Q10[生物学—普通生物学]