Navigation Links
NASA pinpoints causes of 2011 Arctic ozone hole
Date:3/11/2013

A combination of extreme cold temperatures, man-made chemicals and a stagnant atmosphere were behind what became known as the Arctic ozone hole of 2011, a new NASA study finds.

Even when both poles of the planet undergo ozone losses during the winter, the Arctic's ozone depletion tends to be milder and shorter-lived than the Antarctic's. This is because the three key ingredients needed for ozone-destroying chemical reactions chlorine from man-made chlorofluorocarbons (CFCs), frigid temperatures and sunlight are not usually present in the Arctic at the same time: the northernmost latitudes are generally not cold enough when the sun reappears in the sky in early spring. Still, in 2011, ozone concentrations in the Arctic atmosphere were about 20 percent lower than its late winter average.

The new study shows that, while chlorine in the Arctic stratosphere was the ultimate culprit of the severe ozone loss of winter of 2011, unusually cold and persistent temperatures also spurred ozone destruction. Furthermore, uncommon atmospheric conditions blocked wind-driven transport of ozone from the tropics, halting the seasonal ozone resupply until April.

"You can safely say that 2011 was very atypical: In over 30 years of satellite records, we hadn't seen any time where it was this cold for this long," said Susan E. Strahan, an atmospheric scientist at NASA Goddard Space Flight Center in Greenbelt, Md., and main author of the new paper, which was recently published in the Journal of Geophysical Research-Atmospheres.

"Arctic ozone levels were possibly the lowest ever recorded, but they were still significantly higher than the Antarctic's," Strahan said. " There was about half as much ozone loss as in the Antarctic and the ozone levels remained well above 220 Dobson units, which is the threshold for calling the ozone loss a 'hole' in the Antarctic so the Arctic ozone loss of 2011 didn't constitute an ozone hole."

The majority of o
'/>"/>

Contact: Maria-Jose Vinas
maria-jose.vinasgarcia@nasa.gov
301-614-5883
NASA/Goddard Space Flight Center
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Culturally sensitive research in United Arab Emirates pinpoints indoor air quality risks
2. Its in the genes: Research pinpoints how plants know when to flower
3. Computer model pinpoints prime materials for efficient carbon capture
4. U OF A expert pinpoints nutrient behind fresh water algae blooms
5. University of Maryland School of Medicine, NIH study pinpoints brain areas role in learning
6. Research pinpoints key gene for regenerating cells after heart attack
7. Study pinpoints, prevents stress-induced drug relapse in rats
8. Record-breaking grant: New research project to investigate the causes of mental disorders
9. Long-term research reveals causes and consequences of environmental change
10. Glycogen accumulation in neurons causes brain damage and shortens the lives of flies and mice
11. Zebrafish provide insights into causes and treatment of human diseases
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
NASA pinpoints causes of 2011 Arctic ozone hole
(Date:7/9/2015)... July 9, 2015  Synaptics Inc. (NASDAQ: ... human interface solutions, today announced a new ... fully hardware encapsulated fingerprint sensor and matching ... is literally off the grid, isolating fingerprint ... within the fingerprint sensor to provide ultimate ...
(Date:7/8/2015)... NEW YORK , July 8, 2015 /PRNewswire/ ... today announced BD & Guidepoint Mentor, a ... access to Guidepoint,s expert network services. ... cutting-edge technologies to improve healthcare delivery and outcomes and, ... each start-up entrepreneur will be able to directly engage ...
(Date:7/8/2015)... CORAL SPRINGS, Florida , July 8, 2015 ... is constantly evolving as this summer,s must have products such ... high in demand as popularity for biometrics based devices continues ... today are NXT-ID, Inc. (NASDAQ: NXTD ), Google Inc. ... Fitbit Inc. (NYSE: FIT ), GoPro, Inc. (NASDAQ: ...
Breaking Biology News(10 mins):Synaptics Announces World's First Match-in-Sensor Fingerprint Authentication Technology 2Synaptics Announces World's First Match-in-Sensor Fingerprint Authentication Technology 3BD and Guidepoint Team to Connect Healthcare Start-up Companies With Business and Scientific Experts 2BD and Guidepoint Team to Connect Healthcare Start-up Companies With Business and Scientific Experts 3Consumers Flock to This Summer's Must Have Tech Gadgets as Latest Digital Wallets, Smart Technology & Wearable Products Continue to Grow in Popularity & Functionality 2Consumers Flock to This Summer's Must Have Tech Gadgets as Latest Digital Wallets, Smart Technology & Wearable Products Continue to Grow in Popularity & Functionality 3Consumers Flock to This Summer's Must Have Tech Gadgets as Latest Digital Wallets, Smart Technology & Wearable Products Continue to Grow in Popularity & Functionality 4Consumers Flock to This Summer's Must Have Tech Gadgets as Latest Digital Wallets, Smart Technology & Wearable Products Continue to Grow in Popularity & Functionality 5Consumers Flock to This Summer's Must Have Tech Gadgets as Latest Digital Wallets, Smart Technology & Wearable Products Continue to Grow in Popularity & Functionality 6
... Scientists at Chicago,s Field Museum and international collaborators have described ... the most bizarre lower spine on Earth. The interlocking ... five times more robust relative to body mass, a condition ... been an enigma to evolutionary biologists, with no known adaptive ...
... Scientists from The University of Manchester have revealed new ... white blood immune cells attack viral infections and tumours. ... for fighting infections and cancer in the human body, ... by a type of protein found on viral-infected or ...
... July 23, 2013 /PRNewswire-iReach/ -- SmartMove, Inc. ... based company is developing a smartphone based ... " and makes it easy to create healthy physical ... developed by researchers at the University of Colorado, Colorado ...
Cached Biology News:New species of Hero Shrew found in equatorial Africa 2Researchers reveal the clearest new pictures of immune cells 2SmartMove, Inc. receives $200,000 grant from the Colorado Office of Economic Development and International Trade 2
(Date:7/29/2015)... ... 29, 2015 , ... Brady (NYSE:BRC), a global leader in ... To align chemical container labeling with OSHA’s updated Hazard Communication (HazCom) Standard and ... example of an accurate label, and pictogram uses and meanings. , “With changes ...
(Date:7/29/2015)... 2015  Therapath Neuropathology ( www.Therapath.com ), a ... VA and Military Medical centers both domestically and ... and Sweat Gland Nerve Fiber Density (SGNFD) for ... ). Demonstration of a reduction ... punch skin biopsy is a highly sensitive and ...
(Date:7/29/2015)... 2015  Indivior PLC (LON: INDV) today announced that ... was accepted and received Priority Review by the U.S. ... opioid overdose. This naloxone nasal spray comes as a ... absorption into the nasal mucosa. 1 The device ... may be better equipped to help an opioid overdose ...
(Date:7/29/2015)... , July 29, 2015 /PRNewswire/ - RepliCel Life Sciences ... regenerative medicine company, is pleased to announce that the ... (RCI-02) have been locked.  Prototypes for industrial and ... for an application for CE mark clearance to ... in 2016. (Photo: http://photos.prnewswire.com/prnh/20150729/248373 ...
Breaking Biology Technology:Brady Announces a New GHS Label Guide 2Neuropathology services for VA and Military health systems 2Indivior PLC Announces FDA Acceptance of Naloxone Nasal Spray New Drug Application With Priority Review 2Indivior PLC Announces FDA Acceptance of Naloxone Nasal Spray New Drug Application With Priority Review 3Indivior PLC Announces FDA Acceptance of Naloxone Nasal Spray New Drug Application With Priority Review 4Indivior PLC Announces FDA Acceptance of Naloxone Nasal Spray New Drug Application With Priority Review 5RepliCel Life Sciences Unveils Innovative Dermal Injector Prototype 2RepliCel Life Sciences Unveils Innovative Dermal Injector Prototype 3RepliCel Life Sciences Unveils Innovative Dermal Injector Prototype 4RepliCel Life Sciences Unveils Innovative Dermal Injector Prototype 5
... Inc. said it has raised $1.4 million in a ... now about a year old, is developing University of Wisconsin-Madison ... Instead of trying to store the hydrogen, Virent's method involves ... the engine heat to drive a chemical reaction. , ,The ...
... the Legislature are bogged down in a budget fight, just ... it is in Wisconsin. But there's an important distinction between ... of the few areas of agreement, not a source of ... lawmakers and Governor Tim Pawlenty are behind schedule in most ...
... to reach double-digit growth in 2004 for the first time ... concerns over drug safety, pricing and competition from generic drugs ... a look at how the market did. This is according ... firm: , ,If the overall growth of the ...
Cached Biology Technology:Feuds between UW and the Legislature should end for good of the state 2Feuds between UW and the Legislature should end for good of the state 3Though pharma growth slides, blockbusters reach new record 2Though pharma growth slides, blockbusters reach new record 3
... Ideal for cell culture scale-up, these culture ... 7 - 10 9 range and ... or spinner flasks. • High mechanical • ... tested prior to shipping • Certified nonpyrogenic ...
Anti 4-hydroxy-2-hexenal (4-HHE) Monoclonal Antibody (HNEJ-2)...
... System is a high-sensitivity peroxidase and ... kit is intended for use in ... two different antigens within the same ... diluted rabbit and mouse primary antibodies. ...
... enzyme exists predominantly as XDH which converts ... critical plasma antioxidant. During ischemia, XDH ... producing XO by oxidation of essential sulfhydryl ... of the amino-terminus. AO has a ...
Biology Products: