When Last Was the Earth?
I love how science works, how we are able, through the smallest of indirect evidence, use the incredible power of scientific method and role back mystery after mystery, unerringly and inexorably. We create an idea based on a question. We look at what lies before us, collect all the facts, piece them together like some cosmic jig saw, look at the pattern, extract the relevant, present that to our peers, review it and then readdress, constantly readdress and refine the concept.
And so it is with the scientists who study the paleoclimate of our Earth. They seek to understand the workings of the atmosphere of this planet in the distant past so that we may understand the ramifications of playing Faustus with the environment. A young scientist has been able, from measuring the carbonate in the shells of marine animals, to discern that it has been 15 million years since CO2 was last this high in the atmosphere. Here is what Aradhna Tripati, a UCLA assistant professor in the department of Earth and space sciences and the department of atmospheric and oceanic sciences has to say about her study.
“The last time carbon dioxide levels were apparently as high as they are today — and were sustained at those levels — global temperatures were 5 to 10 degrees Fahrenheit higher than they are today, the sea level was approximately 75 to 120 feet higher than today, there was no permanent sea ice cap in the Arctic and very little ice on Antarctica and Greenland. Carbon dioxide is a potent greenhouse gas, and geological observations that we now have for the last 20 million years lend strong support to the idea that carbon dioxide is an important agent for driving climate change throughout Earth’s history,”
Another study showing how we have changed the structure of the atmosphere. This study will enter the mix of science and will be peer reviewed by other climate scientists, who will examine her method, the facts and conclusions of the study and add their own analyses and comments, which will revise and improve upon this one. In the past decade more than 10,000 peer reviewed climate studies have been published in the scientific journals. Not one study has been published bringing new evidence that shows our input of carbon dioxide into the atmosphere is no effect. There have been lots of opinion papers, books and articles, almost all funded, either directly or indirectly by vested governmental and business interests, but no scientific studies, no peer reviewed examinations of the science behind the workings of the atmosphere that contradict the consensus among climatologists that human induced global warming has wreaked unprecedented changes on the Earth.
Thank you Aradhna for your work. Another study, 10,001 to zero.
6 Responses to “ When Last Was the Earth? ”
Add New Comment