Dinosaur Killing Asteroid Caused 100,000 Year Temperature Spike of 5 Degrees Celsius
The monumental event, which caused the extinction of many animals including dinosaurs, is a rare case where Earth’s systems were perturbed at a rate greater than today’s global temperature changes driven by human activity. It therefore provides valuable insights into what may happen from sudden, extreme environmental changes, say the study’s authors.
Ken MacLeod of the University of Missouri, an author involved in the study, said “I think the impact and its aftermath is the single most spectacularly catastrophic event in Earth history.”
The effects of the impact on climate are still unclear, because Chicxulub disturbed many sediments worldwide. Scientists analyze layers of rocks, sediments and the shells of marine animals to understand past climates. These features of the geological record provide important clues about the environment, such as the abundance of atmospheric carbon dioxide, at the time each was deposited in the ground.
MacLeod and his team discovered and analyzed a robust collection of well-preserved, sand grain-sized remains of fish teeth, scales and bone from El Kef in Tunisia that was buried around the time of the asteroid’s impact. These samples retain oxygen isotopic signatures that reveal the temperature at the time that the animals were alive.
The authors were able to collect samples from sediments that span the time leading up to the Chicxulub impact until long afterward. Based on their analysis, they propose that global temperatures abruptly increased at the time of the impact by about 5 C and did not cool to previous values for roughly 100,000 years.
“The clear [change in the geological record] we found suggests temperature change at the boundary was as dramatic as one could imagine,” said MacLeod, who compares it to the changes seen globally today.
“In less than two centuries, we’ve altered the composition of the atmosphere and reworked land surfaces on a global scale. The [perturbation from the Chicxulub impact] happened on human timescales or shorter, and the consequences of that perturbation, based on our data, lasted 100,000 years,” he said.
MacLeod cautioned that these results are derived from just one site in Tunisia, and more pristine geological samples are needed to better understand the full effects of Chicxulub. He has recently returned from another expedition to Mentelle Basin, off the southwest end of Australia, where the team gathered more samples representing this critical era. He is also working with other scientists to use computer modeling to understand atmospheric carbon dioxide concentrations at the time of the impact.
Contacts and sources:
American Association for the Advancement of Science
Citation: Postimpact earliest Paleogene warming shown by fish debris oxygen isotopes (El Kef, Tunisia).
K. G. MacLeod, P. C. Quinton, J. Sepúlveda, M. H. Negra. Science, 2018; eaap8525 DOI: 10.1126/science.aap8525
Source: http://www.ineffableisland.com/2018/05/dinosaur-killing-asteroid-caused-100000.html
Anyone can join.
Anyone can contribute.
Anyone can become informed about their world.
"United We Stand" Click Here To Create Your Personal Citizen Journalist Account Today, Be Sure To Invite Your Friends.
Humic & Fulvic Liquid Trace Mineral Complex
HerbAnomic’s Humic and Fulvic Liquid Trace Mineral Complex is a revolutionary New Humic and Fulvic Acid Complex designed to support your body at the cellular level. Our product has been thoroughly tested by an ISO/IEC Certified Lab for toxins and Heavy metals as well as for trace mineral content. We KNOW we have NO lead, arsenic, mercury, aluminum etc. in our Formula. This Humic & Fulvic Liquid Trace Mineral complex has high trace levels of naturally occurring Humic and Fulvic Acids as well as high trace levels of Zinc, Iron, Magnesium, Molybdenum, Potassium and more. There is a wide range of up to 70 trace minerals which occur naturally in our Complex at varying levels. We Choose to list the 8 substances which occur in higher trace levels on our supplement panel. We don’t claim a high number of minerals as other Humic and Fulvic Supplements do and leave you to guess which elements you’ll be getting. Order Your Humic Fulvic for Your Family by Clicking on this Link , or the Banner Below.
Our Formula is an exceptional value compared to other Humic Fulvic Minerals because...
It’s OXYGENATED
It Always Tests at 9.5+ pH
Preservative and Chemical Free
Allergen Free
Comes From a Pure, Unpolluted, Organic Source
Is an Excellent Source for Trace Minerals
Is From Whole, Prehisoric Plant Based Origin Material With Ionic Minerals and Constituents
Highly Conductive/Full of Extra Electrons
Is a Full Spectrum Complex
Our Humic and Fulvic Liquid Trace Mineral Complex has Minerals, Amino Acids, Poly Electrolytes, Phytochemicals, Polyphenols, Bioflavonoids and Trace Vitamins included with the Humic and Fulvic Acid. Our Source material is high in these constituents, where other manufacturers use inferior materials.
Try Our Humic and Fulvic Liquid Trace Mineral Complex today. Order Yours Today by Following This Link.
![Report abuse](/img/report_abuse.png)
There was no asteroid at any point.. they died due to natural cicles of eart.. read a book called Oahspe.. green version on ebay
read it
I said read it.. dont care about the authors..
read the motherfuckers.. how many goddamn times do i have to say this shit
With a name like Picard I was hoping you’d know a little bit more about space.
“New! Amazing! Wrongco Proxy Crock” at CanadaFreePress website….every climate “proxy” is a CROCK !