Featured Research

from universities, journals, and other organizations

Historic Spanish analysis of atmospheric ozone highlights the importance of chlorofluorocarbon gases

Date:
December 5, 2011
Source:
Plataforma SINC
Summary:
Researchers have rebuilt the ozone column trends recorded between 1978 and 2008 that rise up over the Iberian Peninsula. The results highlight the influence that the prohibition of aerosols and chlorofluorocarbon gases (CFC) has had.

Researchers from the Andalusian Centre for Environmental Studies and the University of Granada have rebuilt the ozone column trends recorded between 1978 and 2008 that rise up over the Iberian Peninsula. The study was published weeks ago in the Atmospheric Environment journal.

Related Articles


The results highlight the influence that the prohibition of aerosols and chlorofluorocarbon gases (CFC) has had. According to Manuel Antón from the Department of Applied Physics of the University of Granada, "although these types of emissions were banned by the 1987 Montreal Protocol, our study reveals that stratospheric ozone did not show signs of recovery until 1995."

"We established two measurement periods. For the first, between 1979 and 1994, we saw that stratospheric ozone depletion was significant with higher levels in the north of the peninsula," states Antón. According to the study, the effects of depletion were felt more in cities such as Barcelona, Santander and La Coruña who all saw a reduction in ozone levels of approximately 4% per decade due to dynamic factors in the stratosphere.

The second period studied, between 1995 and 2008, differed from the first. For example, ozone levels showed positive trends with greater recovery levels (2.5% per decade) in the north-east of the Peninsula where levels were higher than other regions due to industrial emissions. Antón says that "we have seen that the troposphere ozone contributes in recovering total ozone levels."

In contrast to the stratospheric ozone, which acts as a filter against harmful radiation, the tropospheric or ground-level ozone found in the lowest layer of the atmosphere is a secondary pollutant. It mainly comes from the photochemical processes that transform nitrogen oxides and volatile particles from burning fossil fuels into ozone. Heat and light from the sun stimulate such processes which is why ground-level ozone is such a common pollutant in Spain.

The results show that in highly industrial areas such as the north-east of Spain, the recovery of the ozone layer was quicker thanks to the ozone contribution of the troposphere to the stratosphere. However, the authors of the study warn that "other anthropogenic effects could complicate the recovery process and result in areas with altered ozone levels."

The ozone level measurement data used in the study were taken from two satellites. These were the US satellite TOMS (Total Ozone Mapping Spectrometer, which has provided daily images of the spatial distribution of the ozone between 1978 and 2005) and the European satellite GOME (Global Ozone Monitoring Experiment which more recently took measurements from July 1995 to June 2011). The University of Évora (Portugal), the Institute of Atmospheric Sciences and Climate in Bologna (Italy) and the German Aerospace Centre also participated in the study.


Story Source:

The above story is based on materials provided by Plataforma SINC. Note: Materials may be edited for content and length.


Journal Reference:

  1. M. Antón, D. Bortoli, P.S. Kulkarni, M.J. Costa, A.F. Domingues, D. Loyola, A.M. Silva, L. Alados-Arboledas. Long-term trends of total ozone column over the Iberian Peninsula for the period 1979–2008. Atmospheric Environment, 2011; 45 (35): 6283 DOI: 10.1016/j.atmosenv.2011.08.058

Cite This Page:

Plataforma SINC. "Historic Spanish analysis of atmospheric ozone highlights the importance of chlorofluorocarbon gases." ScienceDaily. ScienceDaily, 5 December 2011. <www.sciencedaily.com/releases/2011/12/111205081648.htm>.
Plataforma SINC. (2011, December 5). Historic Spanish analysis of atmospheric ozone highlights the importance of chlorofluorocarbon gases. ScienceDaily. Retrieved April 25, 2015 from www.sciencedaily.com/releases/2011/12/111205081648.htm
Plataforma SINC. "Historic Spanish analysis of atmospheric ozone highlights the importance of chlorofluorocarbon gases." ScienceDaily. www.sciencedaily.com/releases/2011/12/111205081648.htm (accessed April 25, 2015).

Share This


More From ScienceDaily



More Earth & Climate News

Saturday, April 25, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Dispute Flares Over Controversial Thai Temple Tigers

Dispute Flares Over Controversial Thai Temple Tigers

AFP (Apr. 24, 2015) — Thai wildlife officials begin a headcount of nearly 150 tigers kept by monks at a temple which has become the centre of a dispute over the welfare of the animals. Video provided by AFP
Powered by NewsLook.com
The Volcano Under Yellowstone Is Way Bigger Than We Thought

The Volcano Under Yellowstone Is Way Bigger Than We Thought

Newsy (Apr. 24, 2015) — Researchers have discovered a second and larger magma reservoir under Yellowstone National Park, but say the risk of a large eruption is the same. Video provided by Newsy
Powered by NewsLook.com
Chile Volcano Cloud Spreads

Chile Volcano Cloud Spreads

Reuters - News Video Online (Apr. 24, 2015) — Southern Argentina struggles to cope with a blanket of ash after the eruption of the Calbuco volcano in Chile. Rough cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Thousands Evacuate As Chile Volcano Erupts Twice In 24 Hours

Thousands Evacuate As Chile Volcano Erupts Twice In 24 Hours

Newsy (Apr. 23, 2015) — Chile&apos;s Calbuco volcano erupted twice in a span of 24 hours, once Wednesday evening and again early Thursday morning. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins