Navigation Links
European satellites provide new insight into ozone-depleting species
Date:2/25/2009

Using data from the satellite-based MIPAS and GOME-2 instruments, scientists have for the first time detected important bromine species in the atmosphere. These new measurements will help scientists to better understand sources of ozone-depleting species and to improve simulations of stratospheric ozone chemistry.

Despite the detection of bromine monoxide (BrO) in the atmosphere some 20 years ago, bromine nitrate (BrONO2) was first observed in 2008 when scientists from the Karlsruhe Institute of Technology discovered the gas's weak signal with data from MIPAS (the Michelson Interferometer for Passive Atmospheric Sounding).

"By comparing the novel MIPAS BrONO2 dataset with model calculations and BrO measurements by SCIAMACHY on Envisat, our general understanding of stratospheric bromine chemistry has been clearly confirmed," said Michael Hpfner of Germany's Karlsruhe Institute of Technology. "These new observations also enable an independent estimation of the total amount of bromine in the stratosphere, which is important for understanding the origins of stratospheric bromine."

The stratospheric ozone layer that protects life on Earth from harmful ultraviolet rays is vulnerable to the presence of certain chemicals in the atmosphere such as chlorine and bromine. In spite of its much smaller concentrations, bromine is actually, after chlorine, the second most important halogen species destroying ozone in the stratosphere.

Since chlorine levels in the stratosphere have been dropping since the ban on man-made chlorofluorocarbons (CFCs), bromine will become even more important in stratospheric ozone chemistry. Bromine's importance will increase in part because there are more natural sources, such as volcanoes, for bromine emissions than for chlorine.

Volcanoes have long been known to play an important role in influencing stratospheric ozone chemistry because of the gases and particles they shoot into the atmosphere. New findings from space suggest they are also a very important source of atmospheric bromine.

The reactive chemical bromine monoxide (BrO) has been measured in a number of volcanic plumes around the globe, but until recently it had never been measured by a space instrument.

In August 2008, the Kasatochi Volcano in Alaska's Aleutian Islands erupted explosively, sending a cloud of volcanic ash and gas more than 11 km into the atmosphere.

The following day, scientists from the Brussels-based Belgian Institute for Space Aeronomy identified high bromine concentrations in the vicinity of the volcano with Envisat's SCIAMACHY instrument and the Global Ozone Monitoring Experiment-2 (GOME-2) instrument aboard MetOp-A. (MetOp-A, developed by ESA and the European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT), is Europe's first polar-orbiting satellite dedicated to operational meteorology.)

"Because of the good regional coverage of the GOME-2 instrument, the transport of the Kasatochi BrO plume could be followed for six days after the eruption," Michel Van Roozendael from the Belgian Institute for Space Aeronomy said. "Using the Lagrangian dispersion model, results show that the volcanic BrO was directly injected into the upper troposphere/lower stratosphere at altitudes ranging from 8 to 12 km.

"The total mass of reactive bromine released in the atmosphere was estimated around 50 to 120 tons, which corresponds to approximately 25% of the previously estimated total annual mass of reactive bromine emitted by volcanic activity."


'/>"/>

Contact: Mariangela D'Acunto
mariangela.dacunto@esa.int
39-069-418-0856
European Space Agency
Source:Eurekalert

Related biology news :

1. Research project to boost European fish farming
2. Invasions by alien plants have been mapped in European Union
3. Virtual reality: Keyhole surgeons training could help meet European working time directives
4. Global warming linked to European viral epidemic
5. Key to future medical breakthroughs is systems biology, say leading European scientists
6. IRB Barcelona to coordinate two European projects on biomedicine
7. European ancestry increases breast cancer risk among Latinas
8. Overfishing threatens European bluefin tuna
9. European biodiversity and ecosystem scientists merge and gear up for long-term research
10. The MDS foundation supports vidazas recommendation for European approval
11. Vidaza receives positve opinion from European CHMP
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/26/2016)... , April 27, 2016 ... the  "Global Multi-modal Biometrics Market 2016-2020"  report to ... ) , The analysts forecast the ... CAGR of 15.49% during the period 2016-2020.  ... number of sectors such as the healthcare, BFSI, ...
(Date:4/15/2016)... -- Research and Markets has announced the ...  report to their offering.  ,      ... gait biometrics market is expected to grow at ... Gait analysis generates multiple variables such ... compute factors that are not or cannot be ...
(Date:3/31/2016)... 31, 2016   ... the "Company") LegacyXChange is excited to release ... soon to be launched online site for trading 100% ... ) will also provide potential shareholders a sense of ... to an industry that is notorious for fraud. The ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... June 23, 2016 Apellis Pharmaceuticals, Inc. ... clinical trials of its complement C3 inhibitor, APL-2. ... multiple ascending dose studies designed to assess the ... subcutaneous injection in healthy adult volunteers. ... as a single dose (ranging from 45 to ...
(Date:6/23/2016)... 23, 2016 On Wednesday, June 22, ... down 0.22%; the Dow Jones Industrial Average edged 0.27% lower ... 2,085.45, down 0.17%. Stock-Callers.com has initiated coverage on the following ... Therapeutics (NASDAQ: NKTR ), Aralez Pharmaceuticals Inc. (NASDAQ: ... BIND ). Learn more about these stocks by accessing ...
(Date:6/23/2016)... , ... June 23, 2016 , ... ... new line of intelligent tools designed, tuned and optimized exclusively for Okuma CNC ... in Chicago. The result of a collaboration among several companies with expertise in ...
(Date:6/22/2016)... , June 22, 2016 Cell ... will allow them to produce up to one ... one lot within one week. These high-quality, consistent ... laboriously preparing cells and spend more time doing ... through a proprietary, high-volume manufacturing process that produces ...
Breaking Biology Technology: