When Global Warming Was Revealed by the Keeling Curve
Keeling soon determined that the level of atmospheric CO2 was approximately 310 parts per million (ppm)—that is, for every million molecules of gas in the atmosphere, 310 of them were carbon dioxide. That figure remained the same whether he was at his campsite in Big Sur, in the rainforests of the Pacific Northwest or the … 展开
The first Mauna Loa measurement, in March 1958, produced a reading of 313 ppm. But, to Keeling’s surprise, the following month it increased by 1 ppm, and increased again in May, … 展开
The Keeling Curve has since been joined by another iconic climate graph: the so-called “hockey stick,”first published by Michael Mann of Penn State University and colleagues in 1998, which presents relatively stable global temperatures from the year AD 1000 and a … 展开
The Keeling Curve
The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.
Keeling Curve - Wikipedia
The measurements collected at Mauna Loa Observatory show a steady increase in mean atmospheric CO2 concentration from 313 parts per million by volume (ppmv) in March 1958 to 406 ppmv in November 2018, with a current increase of 2.48 ± 0.26 (mean ± 2 std dev) ppmv CO2 per year. This increase in atmospheric CO2 is due to the combustion of fossil fuels, and has been accelerating in recent years. Since CO2 is a greenhouse gas, this has significant implications for
Wikipedia · CC-BY-SA 许可下的文字Keeling Curve | Definition, History, & Facts | Britannica
Keeling Curve, graph showing seasonal and annual changes in atmospheric carbon dioxide (CO_2) concentrations since 1958 at the Mauna Loa Observatory in Hawaii. The graph, devised by American climate scientist Charles David …
The Keeling Curve - National Geographic Society
2024年6月21日 · The Keeling Curve is a graph that represents the concentration of carbon dioxide (CO2) in Earth’s atmosphere since 1958. The Keeling Curve is named after its creator, Dr. Charles David Keeling. Keeling began studying …
New Record for Annual Increase in Keeling Curve Readings
2025年1月17日 · In 2024, the yearly average level of the greenhouse gas carbon dioxide (CO 2) rose faster over the prior year than ever before in the 67-year-old Keeling Curve record.. When …
50 years on: The Keeling Curve legacy - BBC NEWS
2007年12月2日 · The curve set the scene for the debate over climate change, and policies, sometimes controversial, that address the human contribution to the greenhouse effect. Without this curve, and...
Now What? - The Keeling Curve
2013年5月20日 · Many governments throughout the world have agreed that global warming should be limited to no more than 2º C (3.6º F) above the average pre-industrial temperatures of the 1800s. A recent authoritative report …
What Is the Keeling Curve? | Saving Earth
Keeling Curve, graph showing seasonal and annual changes in atmospheric carbon dioxide (CO 2) concentrations since 1958 at the Mauna Loa Observatory in Hawaii. The graph, which was devised by American climate scientist …
Keeling Curve - American Chemical Society
2015年4月30日 · By 1960, Keeling revealed two significant findings, reporting the first quantitative estimate of Earth’s natural seasonal CO 2 oscillations while also discovering a steady annual increase in CO 2, the most significant …
