Navigation Links
Key compound of ozone destruction detected
Date:7/22/2010

This release is available in German.

For the first time, KIT scientists have successfully measured in the ozone layer the chlorine compound ClOOCl which plays an important role in stratospheric ozone depletion. The doubts in the established models of polar ozone chemistry expressed by American researchers based on laboratory measurements are disproved by these new atmospheric observations. The established role played by chlorine compounds in atmospheric ozone chemistry is in fact confirmed by KIT's atmospheric measurements.

The ozone hole above the Antarctic and the destructive role of chlorofluorocarbons (CFC) and their decomposition products have become a synonym of both global environmental problems and their solution by concerted agreements worldwide. Scientific fundamental research into ozone chemistry of the atmosphere was the basis of international agreements, such as the Montreal Protocol of 1987, which has put limits on CFC production. The success of the political implementation of these scientific findings is reflected by the fact that the chlorine content of the atmosphere and, hence, the ozone destruction potential recently started to decrease slowly.

For the first time, scientists from the Institute for Meteorology and Climate Research (IMK) have detected using atmospheric infrared measurements the important, but rather unstable chlorine monoxide dimer (ClOOCl) that plays a central role in stratospheric ozone destruction at the end of the Arctic winter. During the polar winter after sunrise, ClOOCl rapidly forms atomic chlorine which may catalytically decompose ozone. The extent of ClOOCl decay caused by the short-wave sunlight determines the extent of stratospheric polar ozone decomposition.

However, understanding of the processes involved in ozone-destroying atmospheric chlorine chemistry was questioned by laboratory measurements of American scientists (F. Pope et al., J. Phys. Chem. A, 111, 4322-4332, 2007). According to them, the decay of ClOOCl caused by sunlight is smaller than the decay calculated by other working groups. This would also imply weaker ozone decomposition. However, stratospheric chemistry models were found to significantly underestimate the ozone decomposition using these laboratory measurements. Hence, understanding of the ozone destruction processes in general was questioned.

"The atmosphere measurements made by KIT scientists above Northern Scandinavia with the balloon-borne infrared spectrometer MIPAS-B at heights of more than 20 kilometers clearly disprove the doubts of the American scientists and confirm the existing models of polar ozone chemistry," underlines Dr. Gerald Wetzel, member of the IMK staff. "Measurement and evaluation of balloon spectra require a very close cooperation of engineers and scientists, without which these important results would not have been possible."


'/>"/>

Contact: Inge Arnold
inge.arnold@kit.edu
49-724-782-2861
Helmholtz Association of German Research Centres
Source:Eurekalert  

Related biology news :

1. Luteolin stars in study of healthful plant compounds
2. New model is proposed to explain absence of organic compounds on surface of Mars
3. Fluorescent compounds make tumors glow
4. Ontario Cancer Institute, US scientists discover compound that kills lymphoma cells
5. Breathe easy: A natural fruit compound may help asthma
6. Compound screening for drug development made simpler
7. URI pharmacy researcher finds beneficial compounds in pure maple syrup
8. Sanford-Burnham scientists identify natural compound that inhibits cancer cell migration
9. Scientists synthesize unique family of anti-cancer compounds
10. Scripps Research scientists find two compounds that lay the foundation for a new class of AIDS drug
11. Scripps Research scientists create new way to screen libraries of 10 million or more compounds
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Key compound of ozone destruction detected
(Date:3/30/2017)... -- The research team of The Hong Kong Polytechnic ... by adopting ground breaking 3D fingerprint minutiae recovery and matching technology, ... accuracy for use in identification, crime investigation, immigration control, security of ... ... A research team led by Dr ...
(Date:3/29/2017)... -- higi, the health IT company that operates the largest ... , today announced a Series B investment from BlueCross ... new investment and acquisition accelerates higi,s strategy to create ... health activities through the collection and workflow integration of ... and secures data today on behalf of over 36 ...
(Date:3/27/2017)... ROCKVILLE CENTRE, N.Y. , March 27, 2017 ... by Healthcare Information and Management Systems Society (HIMSS) ... Analytics Outpatient EMR Adoption Model sm . In ... top 12% of U.S. hospitals using an electronic ... recognized CHS for its high level of EMR ...
Breaking Biology News(10 mins):
(Date:5/23/2017)... ... May 22, 2017 , ... NetDimensions has been ranked ... Research Globe™ for Corporate Learning, 2017. , Aragon Research defines Leaders as organizations ... effectively perform against those strategies. NetDimensions’ ranking as a Leader due to its ...
(Date:5/23/2017)... ... 2017 , ... Bacterial biofilms, surface adherent communities of bacteria that are encased ... food poisoning and catheter infections to gum disease and the rejection of medical implants. ... dollars per year, there is currently a paucity of means for preventing their formation ...
(Date:5/22/2017)... , ... May 22, 2017 , ... ... that it is exhibiting in booth B2 at the Association for Pathology ... 22-25. , In addition to demonstrating its Cancer Diagnostic Cockpit and Consultation ...
(Date:5/18/2017)... Mass. (PRWEB) , ... May 18, 2017 , ... ... the procedure on April 28, 2017 at the Prince Of Wales Private Hospital. ... cervical disc at level C6-C7. The patient failed conservative treatments prior to undergoing ...
Breaking Biology Technology: