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:6/16/2016)... The global Biometric ... USD 1.83 billion by 2024, according to a ... proliferation and increasing demand in commercial buildings, consumer ... the market growth.      (Logo: ... of advanced multimodal techniques for biometric authentication and ...
(Date:6/9/2016)... Paris Police Prefecture and ... ensure the safety of people and operations in several locations ... Teleste, an international technology group specialised in broadband ... its video security solution will be utilised by ... across the country. The system roll-out is scheduled for the ...
(Date:6/2/2016)... , June 2, 2016 The Department ... has awarded the 44 million US Dollar project, for the ... Vehicle Plates including Personalization, Enrolment, and IT Infrastructure , ... in the production and implementation of Identity Management Solutions. Numerous ... however Decatur was selected for the ...
Breaking Biology News(10 mins):
(Date:12/4/2016)... Mass. and CAMBRIDGE, Mass. ... Africa , Dec. 4, 2016 ... providing connected diagnostics software platforms for the developing ... making "Anywhere. Care.™" a reality with its portable ... have entered into a development and license agreement ...
(Date:12/2/2016)... 2, 2016 More than $4.3 million was raised ... ( DHMD ). The gala was held at the American ... City and honored Alan Alda and ... health and medicine and the public understanding of science. Since ... the event has raised $40 million for the Laboratory,s research ...
(Date:12/2/2016)... , Dec. 2, 2016 Amgen (NASDAQ: ... ) today announced the submission of a Marketing Authorization Application ... a biosimilar candidate to Avastin ® (bevacizumab). The companies ... to the EMA. "The submission of ABP ... seeks to expand our oncology portfolio," said Sean E. ...
(Date:12/2/2016)... 2, 2016 Research and Markets has ... Applications, Markets and Companies" to their offering. ... , , ... pharmaceutical and biotechnology industries is anticipated. Nanotechnology will be applied ... optimal delivery to diagnostic applications in clinical trials. Many of ...
Breaking Biology Technology: