Two 'new' greenhouse gases growing

March 24, 2009

Two new greenhouse gases are accumulating in the atmosphere, according to an international research team led by scientists from the Scripps Institution of Oceanography in the US and CSIRO scientist, Dr Paul Fraser, from the Centre for Australian Weather and Climate Research.

Nitrogen trifluoride (NF3) and sulfuryl fluoride (SO2F2) are powerful that have recently been discovered to be growing quickly in the global background .

These gases are used in industrial processes, partly as alternatives to other harmful greenhouse and ozone depleting gases.

NF3 is used in the electronics industry - often as a replacement for perfluorocarbons (PFCs) - particularly in the manufacture of liquid-crystal flat-panel screens. SO2F2 is used as a replacement for methyl bromide, largely in structural fumigation applications. The new measurements of SO2F2 appear in a paper co-authored by Dr Fraser in the 12 March 2009 edition of the .

"Information about the abundance of these gases in the atmosphere, their growth rates, lifetimes, and emissions is just emerging," Dr Fraser says.
"Currently the level of these gases in the atmosphere is low, but their concentration is growing. In addition, these gases have significant global-warming potential."

The first atmospheric observations of these gases from data collected around the world - particularly at Trinidad Head and La Jolla, California, and Cape Grim, Tasmania - will be presented at the GREENHOUSE 2009 conference.

"This research is likely to affect the revision of the Kyoto Protocol later this year," Dr Fraser says. "New emissions targets for the existing 'basket' of gases (carbon dioxide, methane, nitrous oxide, PFCs, hydrofluorocarbons, sulfur hexafluoride) are likely, as well as inclusion of the new greenhouse gases. A number of new signatories from the developed and developing world are also included in the revised Protocol."

Source: CSIRO Australia

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wawadave
1.8 / 5 (10) Mar 24, 2009
The planet is so so screwed!!
barakn
3.3 / 5 (8) Mar 24, 2009
The background measurement? Of two completely artificial chemicals? Zero, I presume.
dachpyarvile
5 / 5 (2) Mar 28, 2009
Heheheh!

"ALTHOUGH SEMICONDUCTORS remain the principal driver for electronic specialty gases, increased interest in photovoltaics is adding to the push.

Electronic gases are needed in thin-film deposition, such as chemical vapor deposition (CVD) or physical vapor deposition (PVD), technologies used to make a semiconductor or a photovoltaic cell.

The three major gases used in semiconductors, liquid crystal displays (LCDs) and photovoltaics are nitrogen trifluoride (NF3), silane (SiH4) and ammonia.

Emerging thin-film solar cells will be based on thin-film deposition technologies including CVD processing, says industry analyst Mike Corbett, managing partner of Linx Consulting, based in Boston, Massachusetts, US.

"Basically, tandem-cell thin-film solar cell production uses similar CVD tool sets as those used in the LCD industry. So as thin-film solar cells become more popular, there will be a high volume-growth potential for these gases," says Corbett.

According to US-based industrial gas supplier Air Products, solar capacity is growing at more than 30%/year."

("Strong photovoltaic and electronics sectors support nitrogen trifluoride, silane and ammonia demand" URL: http://www.icis.c...and.html Accessed: 3-28-2009)

Looks like the environmentalists are pushing far more toward global warming than they knew and more than their hated CO2 in the long run! :)

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