The alkenone–pCO2 methodology has been used to reconstruct the partial pressure of ancient atmospheric carbon dioxide (pCO2) for the past 45 million years of Earth's history (Middle Eocene to Pleistocene epochs). The present long-term CO2 record is a composite of data from multiple ocean local...
The combined data include paleosols from five continents and formed throughout the last 400 million years. Application of Cerling's CO2 paleobarometer to these data has significantly constrained the history of atmospheric CO2 through this time period.Results indicate that atmospheric pCO2 has ...
Deep Earth degassing is a critical forcing factor for atmospheric CO2variations and palaeoclimate changes in Earth’s history. For the Cenozoic, the key driving mechanism of atmospheric CO2variations remains controversial. Here we analyse three stages of collision-related magmatism in Tibet, which corres...
ODP Site 761T. trilobusB/Ca, Mg/Ca, and δ13Cprecords span a 5-million-year time slice beginning from the onset of the MCO, through its main body and into the MMCT (Fig.1). At the onset of the MCIE, the planktic δ13Cprecord from Site 761 shows an overall increase, followin...
Dubai's population has grown massively, from 40,000 in 1960 to 3.3 million in 2020, an increase of about 80× (Dubai, 2022). In 2021, around 92% of its population were non-Emirati citizens attracted by the job possibilities in Dubai (DSC, 2021c). The male population accounted for 70...
Africa covers an area of over 30 million km2 and makes up 20% of the Earth’s land surface. It is also the only continent to stretch from the northern temperate to the southern temperate zones, which should theoretically allow an exploration of latitudinal migrations of climatic belts. However...
The colony was estimated to cover at least ∼240 km2 of the eastern flank of the Filchner Trough, comprised of fish nests at a density of 0.26 nests per square meter, representing an estimated total of ∼60 million active nests and associated fish biomass of >60,000 tonnes. The ...
Studies estimate that there will be about eight million senior Americans who will become food-insecure by the year 2050. Families facing food insecurity also often choose cheaper food rather than nutritious foods. An estimated 25 percent of those affected are children. Counties most affected by ...
1. A million year supply of Thorium available worldwide. 2. Thorium already mined, ready to be extracted. 3. Thorium based nuclear power produces 0.012 percent as much TRansUranium waste products as traditional nuclear power. 4. Thorium based nuclear power will produce Plutonium-238, needed for...
a similar effect may have operated over the whole of Earth history, wherein cumulative mantle CO2input can drive long-term burial of organic carbon and planetary oxygenation7, but the model of this mechanism could not account for the timing or magnitude of any second oxygen rise after the GOE...