(Phys.org) —For the first time in human history, concentrations of the greenhouse gas carbon dioxide (CO2) could rise above 400 parts per million (ppm) for sustained lengths of time throughout much of the Northern Hemisphere as soon as May 2013. To provide a resource for understanding the...
Review of the history of atmospheric CO2 recorded in ice cores. In: J.R. Trabalka and D.E. Reichle (Editors), The Changing Carbon Cycle: a Global Analysis. Springer, New York, pp. 89-108.Oeschger,H. and B. Stauffer,1986. ‘Review of the History of Atmospheric CO 2 recorded in ...
The lack of a correlation between temperature and CO2 from the start of the Holocene up until 1833 and the fact that the modern CO2 rise outpaced the anthropogenic emissions for about 200 years leads this amateur climate researcher to concluded that CO2 must have been a lot more variable ove...
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 loca...
CO2increased by ∼3 ppm at ∼1500 and remained high until 1570 A.D. then rapidly decreased by ∼7 ppm in the following ∼20–50 years. After that, CO2slowly decreased with a local minimum at 1650 ∼ 1750 A.D. CO2began to rise at ∼1750 A.D., reached levels above the ...
In fact, the new record may hold even further back in history. A report published last year by the World Meteorological Organization revealed that 2016’s CO2 levels were higher than they’d ever been for at least the past three million years. And, in the following two years, we broke ...
The team used the fossilized remains of ancient plant tissues to produce a new record of atmospheric CO2that spans 23 million years of uninterrupted Earth history. They have shown elsewhere that asplantsgrow, the relative amount of the two stable isotopes ofcarbon, carbon-12 and carbon-13 change...
Objective: The objective of the study is to compare the intra- and post-operative outcomes of laparoendoscopic single-site surgery (LESS) and conventional laparoscopic surgery (CLS) in mature cystic teratoma (MCT) of the ovary. Methods: We reviewed 254 patients who underwent surgery (cystectomy)...
True or False. Atmospheric CO2 levels have increased dramatically since the Industrial Revolution.Industrial Revolution:The industrial revolution was a remarkable point in the history of mankind which began in the latter half of the 18th century. It marked the transformation in t...
The ice sheets that extend into the ocean act as barriers keeping massive glaciers, some the size of Florida, from slipping into the ocean. So if the ice sheets melt, as they do at 400 ppm of CO2 or more, the glaciers plop in. Even one of them can raise global sea levels 10 feet...