HOME >> BIOLOGY >> NEWS
U. of Colorado study shows early Earth atmosphere hydrogen-rich, favorable to life

er hot springs or those delivered to Earth from space via meteorites or dust.

The team concluded that even if the atmospheric CO2 concentrations were large, the hydrogen concentrations would have been larger. "In that case, the production of organic compounds with the help of electrical discharge or photochemical reactions may have been efficient," said Toon.

Amino acids that likely formed from organic materials in the hydrogen-rich environment may have accumulated in the oceans or in bays, lakes and swamps, enhancing potential birthplaces for life, the team reported.

The new study indicates the escape of hydrogen from Earth's early atmosphere was probably two orders of magnitude slower than scientists previously believed, said Tian. The lower escape rate is based in part on the new estimates for past temperatures in the highest reaches of Earth's atmosphere some 5,000 miles in altitude where it meets the space environment.

While previous calculations assumed Earth's temperature at the top of the atmosphere to be well over 1,500 degrees F several billion years ago, the new mathematical models show temperatures would have been twice as cool back then. The new calculations involve supersonic flows of gas escaping from Earth's upper atmosphere as a planetary wind, according to the study.

"There seems to have been a blind assumption for years that atmospheric hydrogen was escaping from Earth three or four billion years ago as efficiently as it is today," said Pavlov. "We show the escape was limited considerably back then by low temperatures in the upper atmosphere and the supply of energy from the sun."

Despite somewhat higher ultraviolet radiation levels from the sun in Earth's infancy, the escape rate of hydrogen would have remained low, Tian said. The escaping hydrogen would have been balanced by hydrogen being vented by Earth's volcanoes several billion years ago, making it a major component of the atmosphere
'"/>

Contact: Owen Toon
btoon@lasp.colorado.edu
303-492-1534
University of Colorado at Boulder
7-Apr-2005


Page: 1 2 3

Related biology news :

1. University of Colorado licenses two influenza virus detection discoveries to Quidel Corp.
2. University of Colorado invention may allow thirsty crops to signal farmers
3. Colorado River streamflow history reveals megadrought before 1490
4. University of Colorado influenza chip licensed by Quidel Corp. of San Diego
5. Varied diet of early hominid casts doubt on extinction theory, says Colorado U study
6. Colorado company to sell medical food products based on Wake Forest discovery
7. Early Earth haze may have spurred life, says University of Colorado study
8. Studying water quality in Colorado River Deltas Cienega de Santa Clara
9. Students from U of Colorado at Boulder and Harvard triumph in SIAMs Math Contest in Modeling
10. U. of Colorado team solves mystery of carcinogenic mothballs
11. Historic Colorado River streamflows reconstructed back to 1490

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:8/26/2020)... SHANGHAI (PRWEB) , ... August 24, 2020 , ... ... approaches for the treatment of chronic inflammatory and fibrotic diseases, today announced that ... Vice President of Drug Discovery. , Dr. Canan previously served as Executive Director ...
(Date:8/26/2020)... (PRWEB) , ... August 25, 2020 , ... Modality ... made Inc. magazine’s 2020 annual Inc. 5000 list. The list is the most prestigious ... in 2019 as well, and for this year’s list, reported three-year revenue growth of ...
(Date:8/21/2020)... , ... August 19, 2020 , ... ... LLC and SalivaBio LLC, businesses dedicated to Salivary Bioscience for more than twenty ... recently published book by Springer, " Salivary Bioscience: Foundations of Interdisciplinary Saliva Research ...
Breaking Biology News(10 mins):
(Date:7/31/2020)... Texas (PRWEB) , ... July 29, 2020 , ... ... solutions today announced the launch of its new tagline, “BUILDING FOR LIFE.” The ... biopharmaceutical industry and around the globe, requiring fast track capacity to provide patients ...
(Date:7/31/2020)... , ... July 29, 2020 , ... ... of the top radiation centers in 16 countries, has reached its 20th anniversary ... is now in routine use at top universities including University of Pennsylvania, University ...
(Date:7/18/2020)... DAYTON, Ohio (PRWEB) , ... July 16, 2020 ... ... clinical data solutions to aid in the early detection and prevention of high-burden ... partnership to enable US-based hospitals and healthcare organizations to utilize existing data in ...
(Date:7/10/2020)... Mass. (PRWEB) , ... July 09, 2020 , ... ... approaches to cell therapy, today announced the hiring of Allen R. Nissenson, M.D., ... team and oversee the clinical development of Sentien’s lead product, SBI-101. Dr. ...
Breaking Biology Technology:
Cached News: