tag:blogger.com,1999:blog-9959776.post1383055973158130295..comments2024-02-15T04:42:41.606+00:00Comments on James' Empty Blog: BlueSkiesResearch.org.uk: Blueskies tour of the USAJames Annanhttp://www.blogger.com/profile/04318741813895533700noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-9959776.post-64626757997537949672017-01-04T17:48:34.012+00:002017-01-04T17:48:34.012+00:00More travel plans? (emphasis added)
http://www....More travel plans? (emphasis added)<br /><br />http://www.sciencemag.org/news/2017/01/fossil-leaves-suggest-global-warming-will-be-harder-fight-scientists-thought<br /><br />By revealing lower CO2 levels during ancient warmings, he says, the gas exchange technique <b>suggests a climate sensitivity closer to 4°C, not 3°C</b>. It may take several generations for that rise to kick in, but history suggests that it is built into the climate system. “I do find it worrying,” McElwain says. “Within 50–100 years the Earth’s surface temperature could rise much higher than we currently anticipate.”<br /><br />Still, the technique is new, and its message is far from definitive. This March, at a workshop at Columbia University’s Lamont-Doherty Earth Observatory in Palisades, New York, the CO2 proxies will square off in a competition of sorts. Paleoclimatologists plan to weigh the different proxy techniques and come up with a consensus record of CO2 over the past 66 million years.<br /><br />Franks is confident that the gas exchange technique will fare well. “There’s little argument that the uncertainty you get from this is improved,” he says. “I’m not evangelizing for this model. I think it will take care of itself.”<br />Posted in: Climate<br /><br />DOI: 10.1126/science.aal0567Hank Robertshttps://www.blogger.com/profile/07521410755553979665noreply@blogger.comtag:blogger.com,1999:blog-9959776.post-85118074043708299042017-01-01T03:17:38.278+00:002017-01-01T03:17:38.278+00:00I too hope it survives. I too hope it survives. David B. Bensonhttps://www.blogger.com/profile/02917182411282836875noreply@blogger.com