J. et al. Sensitivity of plants to changing atmospheric CO2 concentration: from the geological past to the next century. New Phytol. 197, 1077–1094 (2013). CAS PubMed Google Scholar Kimball, B. A. Carbon dioxide and agricultural yield: an assemblage and analysis of 430 prior observations...
Over the past 250 years, humans have added just one part ofCO2in 10,000 to theatmosphere. One volcanic cough can do this in a day." (Ian Plimer) Volcanoes emitCO2both on land and underwater. Underwater volcanoes emit between 66 to 97 million tonnes ofCO2per year. However, this is ba...
“Hopes that global emissions had peaked during the past three years were likely premature. However, GCP researchers say that global emissions are unlikely to return to the high growth rates seen during the 2000s. They argue that it is more likely that emissions over the next few years will ...
both periods of economiccontraction, but this is the first time for many years that the world economy has grown and emissions have not risen too. ③Over the past five years GDP among all rich countries has risen by 7% but C...
Superimposed on this long-term trend, recorded negative CO2 anomalies of 4–10 ppmv during the past 2000 years (Indermühle et al., 1999) could offer evidence of periodic carbon sequestration possibly due to reforestation of abandoned farmlands following pandemics of plague and other diseases, when...
In the past 1 Ma, the period of glacial cycles switched from ~41 thousand years (ky) to ~100 ky (mid-Pleistocene Transition, MPT), with the magnitude of the climate change associated with the glacial cycles significantly enhanced1,2. What has ultimately driven these far-reaching climate...
Junium 8 4,5, The emergence of forests on Earth (~385 million years ago, Ma)1 has been linked to an order-of-magnitude decline in atmospheric CO2 levels and global climatic cooling by altering continental weathering processes, but observa- tional constraints on atmospheric CO2 before the ...
The venous carbon dioxide blood test should be similar to any blood tests you’ve had done in the past. You may feel some pain or have minor bruising afterward, but, in general, the risks and contraindications are minimal. Be sure to tell your healthcare provider about any medications you...
attributable to the increase in atmospheric carbon dioxide over that decade and agrees with model results.#Model studies have been used to quantify the effects of increasing concentrations of atmospheric CO2on infrared energy balance and thus climate over the past 200 years, but observational data ...
The last time carbon dioxide levels were this high, Greenland was mostly green, sea levels were up to 20 meters higher and trees grew on Antarctica, according to scientists who warned this week that there is more CO2 in our atmosphere today than in the past three million years. Using a n...