Featured Research

from universities, journals, and other organizations

Shifting ozone hole exposed South America to more ultraviolet light in 2009

Date:
August 31, 2010
Source:
American Geophysical Union
Summary:
The ozone layer, which protects humans, plants, and animals from potentially damaging ultraviolet (UV) light from the Sun, develops a hole above Antarctica in September that typically lasts until early December. However, in November 2009, that hole shifted its position, leaving the southern tip of South America exposed to UV light at levels much greater than normal.

The ozone layer, which protects humans, plants, and animals from potentially damaging ultraviolet (UV) light from the Sun, develops a hole above Antarctica in September that typically lasts until early December. However, in November 2009, that hole shifted its position, leaving the southern tip of South America exposed to UV light at levels much greater than normal.

To characterize this event and to evaluate satellite monitoring capabilities, de Laat et al. analyze satellite and ground-based measurements of ozone levels and the UV index (UVI). They find that the ozone column over southern South America was especially thin from 11 to 30 November 2009, and significantly higher UVI values were measured.

Such abnormally low ozone levels sustained during a continuous period of three weeks had not been observed above southern South American at any time in the past 30 years, the researchers say. The high UVI values occurred over populated regions, meaning that humans had been exposed to increased levels of UV light. The scientists also note that the satellite-based measurements agreed well with the ground-based measurements, suggesting that satellite measurements can be valuable for monitoring ozone and UV radiation levels.

Authors of the study include: A. T. J. de Laat, R. J. van der A, M. A. F. Allaart, and M. van Weele: Royal Netherlands Meteorological Institute, de Bilt, Netherlands; G. C. Benitez: Observatorio Central de Buenos Aires, Servicio Meteorológico Nacional, Buenos Aires, Argentina and PEPACG, Pontificia Universidad Católica Argentina, Buenos Aires, Argentina; C. Casiccia: Laboratorio de Monitoreo de Ozono y Radiación Ultravioleta, University of Magallanes, Magallanes, Chile; N. M. Paes Leme: Ozone Laboratory, National Institute for Space Research, São José dos Campos, Brazil; E. Quel, J. Salvador, and E. Wolfram: División Lidar, CEILAP, CITEFA, CONICET, Río Gallegos, Argentina.


Story Source:

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


Journal Reference:

  1. A. T. J. de Laat, R. J. van der A, M. A. F. Allaart, M. van Weele, G. C. Benitez, C. Casiccia, N. M. Paes Leme, E. Quel, J. Salvador, E. Wolfram. Extreme sunbathing: Three weeks of small total O3 columns and high UV radiation over the southern tip of South America during the 2009 Antarctic O3 hole season. Geophysical Research Letters, 2010; 37 (14): L14805 DOI: 10.1029/2010GL043699

Cite This Page:

American Geophysical Union. "Shifting ozone hole exposed South America to more ultraviolet light in 2009." ScienceDaily. ScienceDaily, 31 August 2010. <www.sciencedaily.com/releases/2010/08/100831094857.htm>.
American Geophysical Union. (2010, August 31). Shifting ozone hole exposed South America to more ultraviolet light in 2009. ScienceDaily. Retrieved October 21, 2014 from www.sciencedaily.com/releases/2010/08/100831094857.htm
American Geophysical Union. "Shifting ozone hole exposed South America to more ultraviolet light in 2009." ScienceDaily. www.sciencedaily.com/releases/2010/08/100831094857.htm (accessed October 21, 2014).

Share This



More Earth & Climate News

Tuesday, October 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Traditional Farming Methods Gaining Ground in Mali

Traditional Farming Methods Gaining Ground in Mali

AFP (Oct. 20, 2014) — He is leading a one man agricultural revolution in Mali - Oumar Diatabe uses traditional farming methods to get the most out of his land and is teaching others across the country how to do the same. Duration: 01:44 Video provided by AFP
Powered by NewsLook.com
How Detroit's Money Woes Led To U.N.-Condemned Water Cutoffs

How Detroit's Money Woes Led To U.N.-Condemned Water Cutoffs

Newsy (Oct. 20, 2014) — The United Nations says water is a human right, but should it be free? Detroit has cut off water to residents who can't pay, and the U.N. isn't happy. Video provided by Newsy
Powered by NewsLook.com
Hey, Doc! Sewage, Beer and Food Scraps Can Power Chevrolet’s Bi-Fuel Impala

Hey, Doc! Sewage, Beer and Food Scraps Can Power Chevrolet’s Bi-Fuel Impala

3BL Media (Oct. 20, 2014) — Hey, Doc! Sewage, Beer and Food Scraps Can Power Chevrolet’s Bi-fuel Impala Video provided by 3BL
Powered by NewsLook.com
White Rhino's Death In Kenya Means Just 6 Are Left

White Rhino's Death In Kenya Means Just 6 Are Left

Newsy (Oct. 20, 2014) — Suni, a rare northern white rhino at Ol Pejeta Conservancy, died Friday. This, as many media have pointed out, leaves people fearing extinction. 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