Navigation Links
Hazy shades of life on early Earth
Date:3/18/2012

Instead, the authors suggest that the atmosphere transitioned repeatedly between two states: one with a thin, hydrocarbon haze and the other haze-free. These geochemical records were supported by models of the ancient atmosphere performed by colleagues at the NASA Astrobiology Institute, led by Dr Mark Claire (currently at the University of East Anglia, UK) and Dr Shawn Domagal-Goldman, which demonstrated how the transitions could be caused by changes in the rate of methane production by microbes.

The conditions which enabled the bi-stable organic haze to form permanently ended when the atmosphere became oxygenated some 100 million years after the sediments were laid down.

"What is most surprising about this study is that our data seems to indicate the atmospheric events were discrete in nature, flip-flopping between one stable state into another," explains co-author Dr Farquhar.

"This type of response is not all that different from the way scientists think climate operates today, and reminds us how delicate the balance between states can be."

Professor Mark Thiemens, Dean of Physical Sciences at the University of California San Diego, adds: "Another important facet of the work is that it provides insight into the formation of atmospheric aerosols, particularly organic ones.

"Besides the obvious importance for the evolution of the atmosphere, the role of aerosol formation is one of the most poorly understood components in the present day climate models. This provides a new look into this process that is quite new and valuable."


'/>"/>

Contact: Dr. Aubrey Zerkle
aubrey.zerkle@newcastle.ac.uk
44-191-222-6916
Newcastle University
Source:Eurekalert

Page: 1 2

Related biology news :

1. Rutgers-Camden researcher examines how the brain perceives shades of gray
2. Shades of gray: LSU researcher studies South Louisianas historical ties to the oil industry
3. Nightshades mating habits strike uneasy evolutionary balance
4. Shades of 1918? New study compares avian flu with a notorious killer from the past
5. An early spring drives butterfly population declines
6. Mid-Atlantic suburbs can expect an early spring thanks to the heat of the big city
7. Artificial womb unlocks secrets of early embryo development
8. Scripps Florida team awarded nearly $1.5 million to develop potent new HIV inhibitors
9. Promising early results with therapeutic cancer vaccines
10. Metabolic breathalyzer reveals early signs of disease
11. Same genes linked to early- and late-onset Alzheimers
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/15/2014)... and to an unexpected extent. The outbreak does not ... virus shows a new disease dynamic in regions, where ... the German National Academy of Sciences Leopoldina, acatech – ... Union of the German Academies of Sciences and Humanities ... , In the statement the academies call for the ...
(Date:10/15/2014)... , Oct. 15, 2014 NXT-ID, Inc. (NASDAQ: ... authentication company focused on the growing mobile commerce market releases photos ... in Times Square on Monday October 13 th . ... David Tunnel and angel investor Mr. Chad A. ... , CEO of NXT-ID thanked his investors and employees "for their ...
(Date:10/15/2014)... VILNIUS, Lithuania , Oct. 15, 2014 /PRNewswire/ ... identification technologies, today announced the availability of the ... . VeriLook Surveillance 3.0 provides real-time biometric face ... multiple high-resolution digital surveillance cameras. The new version ... detects and differentiates people from objects while they ...
Breaking Biology News(10 mins):Academies call for consequences from the Ebola virus epidemic 2Academies call for consequences from the Ebola virus epidemic 3Academies call for consequences from the Ebola virus epidemic 4Academies call for consequences from the Ebola virus epidemic 5Photo Release: NXT-ID Inc. Rings Opening Bell of the NASDAQ Stock Market October 13th 2Photo Release: NXT-ID Inc. Rings Opening Bell of the NASDAQ Stock Market October 13th 3VeriLook Surveillance 3.0 SDK Identifies Faces and Moving Objects, Differentiates Pedestrians from Other Moving Objects in Video Surveillance Systems 2VeriLook Surveillance 3.0 SDK Identifies Faces and Moving Objects, Differentiates Pedestrians from Other Moving Objects in Video Surveillance Systems 3
... the Rosetta Stone resolved a longstanding puzzle, permitting the ... John Chaput, a researcher at Arizona State University,s ... Stonean enzyme allowing DNA,s 4-letter language to be written ... may have existed as a genetic pathway to DNA ...
... University of Bristol, and his team at the University of Queensland ... the Landolt C test to discover just how fine a detail ... to spit at one of two letters an ,O, or ... showed them small versions of both letters together and recorded which ...
... LAFAYETTE, Ind. - New research findings may help scientists ... potentially fatal brain swelling and paralysis in children., The ... disease and is common throughout the world. Although that ... reported to cause fatal encephalitis in infants and young ...
Cached Biology News:Enzymes allow DNA to swap information with exotic molecules 2Enzymes allow DNA to swap information with exotic molecules 3Enzymes allow DNA to swap information with exotic molecules 4Archerfish get an eye test 2Findings to help in design of drugs against virus causing childhood illnesses 2
(Date:10/19/2014)... 19, 2014 The report "Unmanned ... Homeland Security), Technology, Payload, Type & by Geography ... the global unmanned ground vehicle market into various ... of market sizes. The report also identifies the ... impacting it along with the adoption trends. , ...
(Date:10/18/2014)... The Asia-Pacific Bio-based Advanced Phase Change Materials Market ... change material market in Asia-Pacific with analysis and ... of the Asia-Pacific Bio-based Advanced Phase Change Materials ... in-depth analysis provided. This also provides a glimpse ... phase change material market, and is supported by ...
(Date:10/18/2014)... The Asia-Pacific hardware encryption display market report defines ... and forecast of revenue. This market was valued $5,154.0 ... million by 2018, at a CAGR of 58.4% from ... the Asia-Pacific hardware encryption market report, to get an ... a glimpse of the segmentation of the market, and ...
(Date:10/18/2014)... (PRWEB) October 18, 2014 The ... rate in the five years to 2014. The industry's ... renewable energy tax credits that encouraged the use of ... renewable portfolio standards (RPSs), which require local utilities to ... their total energy portfolio. Increased campaigning for green technology ...
Breaking Biology Technology:Unmanned Ground Vehicle (UGV) Market Estimated to Reach $8.26 Billion by 2020 - New Research Report by MarketsandMarkets 2Unmanned Ground Vehicle (UGV) Market Estimated to Reach $8.26 Billion by 2020 - New Research Report by MarketsandMarkets 3Unmanned Ground Vehicle (UGV) Market Estimated to Reach $8.26 Billion by 2020 - New Research Report by MarketsandMarkets 4Unmanned Ground Vehicle (UGV) Market Estimated to Reach $8.26 Billion by 2020 - New Research Report by MarketsandMarkets 5The Asia-Pacific Bio-based Advanced Phase Change Materials Market is estimated to grow to $39.8 million by 2018 - New Report by MicroMarket Monitor 2The Asia-Pacific Bio-based Advanced Phase Change Materials Market is estimated to grow to $39.8 million by 2018 - New Report by MicroMarket Monitor 3The Asia-Pacific Bio-based Advanced Phase Change Materials Market is estimated to grow to $39.8 million by 2018 - New Report by MicroMarket Monitor 4The Asia-Pacific hardware encryption display market is expected to reach $51,362.6 million by 2018 - New Report by MicroMarket Monitor 2The Asia-Pacific hardware encryption display market is expected to reach $51,362.6 million by 2018 - New Report by MicroMarket Monitor 3Biomass Power in the US Industry Market Research Report from IBISWorld Has Been Updated 2Biomass Power in the US Industry Market Research Report from IBISWorld Has Been Updated 3
... GenVault Corporation today,announces Paul J. Mirabella, Chairman ... its Board of Directors. Mr. Mirabella has more ... GE Healthcare where he held,leadership roles in technology, ... background in diagnostics and the healthcare,market, he will ...
... Ardea Biosciences, Inc.,(Nasdaq: RDEA ) today announced the ... "We are pleased to welcome Mr. Johnson to ... said Barry D. Quart, PharmD, Ardea,Biosciences, President and CEO. ... will chair our Audit Committee. We look,forward to his ...
... 12 Raymond J. De,Hont, Chairman and Chief Executive ... Company,s Fybroc business unit has received,an order for approximately ... the second and third quarters of the Company,s current ... large order Fybroc has received this year from the,Eastern ...
Cached Biology Technology:Paul J. Mirabella, President and CEO of Naviscan PET Systems Inc., Joins GenVault's Board of Directors 2Craig Johnson Joins Ardea Biosciences' Board of Directors 2Craig Johnson Joins Ardea Biosciences' Board of Directors 3Met-Pro Corporation's Fybroc Business Unit Receives Equipment Order Totaling Approximately $500,000 2Met-Pro Corporation's Fybroc Business Unit Receives Equipment Order Totaling Approximately $500,000 3
Clarin Mounting Medium (Permanent environmentally safe mounting medium for general histology & cytology use)...
IHC Zinc Fixative - , 1000 ml Consult technical datasheet for details....
Rabbit polyclonal to JNK1 (phospho T183 + Y185) ( Abpromise for all tested applications). entrezGeneID: 5599 SwissProtID: P45983...
Cytofix Buffer 100 mls...
Biology Products: