We present a compilation of tropospheric 14CO2 for the period 1950-2010, based on published radiocarbon data from selected records of atmospheric CO2 sampling and tree-ring series. This compilation is a new version of the compilation by Hua and Barbetti (2004) and consists of yearly summer data...
aStarting in the late 1950s with the groundbreaking research of Roger Revelle and Charles Keeling, scientists have long been aware of the essential role played by the ocean in mitigating the impact of elevated atmospheric carbon dioxide (CO2) levels. Ice core record measurements of carbon dioxide...
We present a compilation of tropospheric 14CO2 for the period 1950-2010, based on published radiocarbon data from selected records of atmospheri... Quan,Hua,Barbetti,... - 《Radiocarbon》 被引量: 462发表: 2013年 Atmospheric carbon dioxide and radiocarbon in the natural carbon cycle: I. Quanti...
Model calculations indicate that in 1950 industrial CO 2 emissions are responsible for at least 85% of the Δ 14C decline, whereas natural variability accounts for the remaining 15%. 展开 关键词: Theoretical or Mathematical, Experimental/ air pollution atmospheric composition carbon compounds cosmic ...
[3]In this context, construction of precise and continuous paleoatmospheric CO2records is essential to improving our understanding of the carbon cycle. However, since precise instrumental measurements of atmospheric CO2began only in the late 1950s (C. D. Keeling and T. P. Whorf,http://gcmd.nas...
The stabilization of atmospheric CO2 concentration during the 1940s and 1950s is a notable feature in the ice core record. The new high density measurements confirm this result and show that CO2 concentrations stabilized at 310–312 ppm from ~1940–1955. The CH4 and N2O growth rates also dec...
From the title of their article, "Evidence for decoupling of atmospheric CO2 and global climate during the Phanerozoic eon", the authors evidently feel ... S Hedges - 《Nature》 被引量: 86发表: 2000年 Acidity effects on the formation of α -pinene ozone SOA in the presence of inorganic ...
The increase in atmospheric CO2 observed since the 1950s is most likely dominated by anthropogenic CO2 emissions, which are twice as large as that needed to explain the observed rise. As I haveshown before, a simple CO2 budget model driven by (1) estimates of global yearly anthropogenic CO2 ...
Answer to: True or False. Atmospheric CO2 levels have increased dramatically since the Industrial Revolution. By signing up, you'll get thousands...
Predicting impacts of increased CO2 and climate change on the water cycle and water quality in the semiarid James River Basin of the Midwestern USA Emissions of greenhouse gases and aerosols from human activities continue to alter the climate and likely will have significant impacts on the terrestri...