Seawater Temperature and Dissolved Oxygen over the Past 500 Million Years

被引:125
作者
Song, Haijun [1 ]
Wignall, Paul B. [2 ]
Song, Huyue [1 ]
Dai, Xu [1 ]
Chu, Daoliang [1 ]
机构
[1] China Univ Geosci, Sch Earth Sci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Hubei, Peoples R China
[2] Univ Leeds, Sch Earth & Environm, Leeds LS2 9JT, W Yorkshire, England
基金
欧盟地平线“2020”; 英国自然环境研究理事会; 中国国家自然科学基金;
关键词
sea surface temperature; global warming; ocean anoxic event; dissolved oxygen; Phanerozoic; SEA-SURFACE TEMPERATURE; ATMOSPHERIC CO2; GLOBAL CLIMATE; EVOLUTION; MODEL; O-2; FRACTIONATION; EXTINCTIONS; OCEANS; WATER;
D O I
10.1007/s12583-018-1002-2
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Ocean temperature and dissolved oxygen concentrations are critical factors that control ocean productivity, carbon and nutrient cycles, and marine habitat. However, the evolution of these two factors in the geologic past are still unclear. Here, we use a new oxygen isotope database to establish the sea surface temperature (SST) curve in the past 500 million years. The database is composed of 22 796 oxygen isotope values of phosphatic and calcareous fossils. The result shows two prolonged cooling events happened in the Late Paleozoic and Late Cenozoic, coinciding with two major ice ages indicated by continental glaciation data, and seven global warming events that happened in the Late Cambrian, Silurian-Devonian transition, Late Devonian, Early Triassic, Toarcian, Late Cretaceous, and Paleocene-Eocene transition. The SSTs during these warming periods are about 5-30 degrees C higher than the present-day level. Oxygen contents of shallow seawater are calculated from temperature, salinity, and atmospheric oxygen. The results show that major dissolved oxygen valleys of surface seawater coincide with global warming events and ocean anoxic events. We propose that the combined effect of temperature and dissolved oxygen account for the long-term evolution of global oceanic redox state during the Phanerozoic.
引用
收藏
页码:236 / 243
页数:8
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