Navigation Links
New long-lived greenhouse gas discovered by University of Toronto chemistry team
Date:12/9/2013

Scientists from U of T's Department of Chemistry have discovered a novel chemical lurking in the atmosphere that appears to be a long-lived greenhouse gas (LLGHG). The chemical perfluorotributylamine (PFTBA) is the most radiatively efficient chemical found to date, breaking all other chemical records for its potential to impact climate.

Radiative efficiency describes how effectively a molecule can affect climate. This value is then multiplied by its atmospheric concentration to determine the total climate impact.

PFTBA has been in use since the mid-20th century for various applications in electrical equipment and is currently used in thermally and chemically stable liquids marketed for use in electronic testing and as heat transfer agents. It does not occur naturally, that is, it is produced by humans. There are no known processes that would destroy or remove PFTBA in the lower atmosphere so it has a very long lifetime, possibly hundreds of years, and is destroyed in the upper atmosphere.

"Global warming potential is a metric used to compare the cumulative effects of different greenhouse gases on climate over a specified time period," said Cora Young who was part of the U of T team, along with Angela Hong and their supervisor, Scott Mabury. Time is incorporated in the global warming potential metric as different compounds stay in the atmosphere for different lengths of time, which determines how long-lasting the climate impacts are.

Carbon dioxide (CO2) is used as the baseline for comparison since it is the most important greenhouse gas responsible for human-induced climate change. "PFTBA is extremely long-lived in the atmosphere and it has a very high radiative efficiency; the result of this is a very high global warming potential. Calculated over a 100-year timeframe, a single molecule of PFTBA has the equivalent climate impact as 7100 molecules of CO2," said Hong.


'/>"/>

Contact: Kim Luke
kim.luke@utoronto.ca
416-978-4352
University of Toronto
Source:Eurekalert

Page: 1

Related biology news :

1. New method for creating long-lived stem cells used for bone replacement
2. Mystery to the origin of long-lived, skin-deep immune cells uncovered
3. Unusual greenhouse gases may have raised ancient Martian temperature
4. NPL and Astrium launch measurement service to improve analysis of greenhouse gas emissions
5. Companies close to reusing the greenhouse gas carbon dioxide
6. QUT develops software to reduce greenhouse gases
7. Sediment trapped behind dams makes them hot spots for greenhouse gas emissions
8. Greenhouse gas likely altering ocean foodchain
9. 21 percent of homes account for 50 percent of greenhouse gas emissions
10. Major rethink needed if chemical industry is to meet greenhouse gas targets
11. Research on geological storage of CO2 to reduce greenhouse gas emissions
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/15/2016)... York , March 15, 2016 ... market report published by Transparency Market Research "Digital Door Lock ... and Forecast 2015 - 2023," the global digital door lock ... 731.9 Mn in 2014 and is forecast to grow at ... Growth of micro, small and medium enterprises (MSMEs) across the ...
(Date:3/11/2016)... PUNE, India , March 11, 2016 ... to a new market research report "Image Recognition Market ... by Application (Marketing and Advertising), by Deployment Type (On-Premises ... Global Forecast To 2022", published by MarketsandMarkets, the global ... in 2015 to USD 29.98 Billion by 2020, at ...
(Date:3/9/2016)... BEACH GARDENS, Fla. , March 9, 2016 ... identity management authentication and enrollment solutions, today announced ... DigitalPersona ® Altus multi-factor authentication ... IT and InfoSec managers to step-up security where ... Washington, DC . ...
Breaking Biology News(10 mins):
(Date:4/28/2016)... , ... April 28, 2016 , ... ... will deliver a talk on its first-in-class technologies for tissue stem cell ... Meeting on RNAiMicroRNA Biology to Reprogramming & CRISPR-based Genome Engineering in Burlington, ...
(Date:4/28/2016)... ... April 28, 2016 , ... Morris ... open house for regional manufacturers at its Maple Grove, Minnesota technical center, May ... Group, Chiron and Trumpf. Almost 20 leading suppliers of tooling, accessories, software ...
(Date:4/27/2016)... ... ... Shimadzu Scientific Instruments (SSI) will be showcasing a broad ... Expo. Shimadzu’s high-performance instruments enable laboratories to test cannabis products for potency, moisture, ... booth 1021 to learn how Shimadzu’s instruments can help improve QA/QC testing, peak ...
(Date:4/27/2016)... New York, NY (PRWEB) , ... April 27, ... ... without realizing it. Touch screen mobile devices with fingerprint recognition for secure ... image libraries are only a few ways consumers are interacting with biometrics technology ...
Breaking Biology Technology: