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

zone depletion in the Arctic happens inside the so-called polar vortex: a region of fast-blowing circular winds that intensify in the fall and isolate the air mass within the vortex, keeping it very cold.

Most years, atmospheric waves knock the vortex to lower latitudes in later winter, where it breaks up. In comparison, the Antarctic vortex is very stable and lasts until the middle of spring. But in 2011, an unusually quiescent atmosphere allowed the Arctic vortex to remain strong for four months, maintaining frigid temperatures even after the sun reappeared in March and promoting the chemical processes that deplete ozone.

The vortex also played another role in the record ozone low.

"Most ozone found in the Arctic is produced in the tropics and is transported to the Arctic," Strahan said. "But if you have a strong vortex, it's like locking the door -- the ozone can't get in."

To determine whether the mix of man-made chemicals and extreme cold or the unusually stagnant atmospheric conditions was primarily responsible for the low ozone levels observed, Strahan and her collaborators used an atmospheric chemistry and transport model (CTM) called the Global Modeling Initiative (GMI) CTM. The team ran two simulations: one that included the chemical reactions that occur on polar stratospheric clouds, the tiny ice particles that only form inside the vortex when it's very cold, and one without. They then compared their results to real ozone observations from NASA's Aura satellite.

The results from the first simulation reproduced the real ozone levels very closely, but the second simulation showed that, even if chlorine pollution hadn't been present, ozone levels would still have been low due to lack of transport from the tropics. Strahan's team calculated that the combination of chlorine pollution and extreme cold temperatures were responsible for two thirds of the ozone loss, while the remaining third was due to the atypical atm
'/>"/>

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:4/20/2015)... The announcement comes as demand for fire vault ... Ireland,s foremost records management company, has secured ... impressive track record of clients within the first 12 months, ... sector in Dubai . As a result, ... a further eight staff members at its Irish headquarters. The ...
(Date:4/14/2015)... NEW YORK , April 14, 2015 /PRNewswire/ ... Fast IDentity Online (FIDO ® ) Alliance tm ... standards-based specifications. FIDO members commit to share technology ... authentication methods that are interoperable, more secure and ... specifications enable biometric identity verification that protects sensitive ...
(Date:4/13/2015)... April 13, 2015 According ... "Global Biometrics Market Forecast & Opportunities, 2020", the global ... of around 14% till 2020. The biometrics market ... scale implementation and review of biometric management systems. ... new products with greater efficiency, are resulting in ...
Breaking Biology News(10 mins):Glenbeigh Records Management Wins Contract With Dubai Islamic Bank 2Glenbeigh Records Management Wins Contract With Dubai Islamic Bank 3HYPR Corp. Joins the FIDO Alliance 2HYPR Corp. Joins the FIDO Alliance 3Global Biometrics Market to Cross US$ 21 Billion by 2020: TechSci Research 2
... follows form" might have been written to describe proteins, ... nature,s workhorse biomolecules enables each to carry out its ... X-ray protein crystallography, in which a beam of x-rays ... protein,s atoms, creating a diffraction pattern of dots that ...
... prescribed drugs for the treatment of heart failure are beta-blockers ... the heart,s workload. The drugs were thought to produce those ... study led by scientists at Temple University School of Medicine, ... counteracting the effects of an enzyme known as GRK2. The ...
... Nov. 5, 2013  The AVS has selected its major award ... to encourage excellence in research and innovation in technical areas ... award winners: Medard W. Welch Award— Dr. ... Barbara, "For seminal contributions to the theory of heterojunctions and ...
Cached Biology News:Bringing out the best in X-ray crystallography data 2Temple researchers uncover clues to how existing heart drugs work 2AVS Announces Its Major Award Winners of 2013 2AVS Announces Its Major Award Winners of 2013 3AVS Announces Its Major Award Winners of 2013 4AVS Announces Its Major Award Winners of 2013 5AVS Announces Its Major Award Winners of 2013 6
(Date:5/5/2015)... 5, 2015 Reprints Desk, Inc., a Research ... access to scientific, technical and medical (STM) content, today ... Association of Southeastern Research Libraries (ASERL) . ... across 11 southeastern states. Founded in 1956, ASERL has ... to address the continually changing needs of its member ...
(Date:5/5/2015)... Franz Inc ., the leading supplier ... its flagship product, AllegroGraph, has been named a Champion by ... report. AllegroGraph is a high performance Semantic Graph ... Graph databases are skyrocketing in popularity and have grown by ... DBMS ranking by DB-Engines. , “We are excited ...
(Date:5/5/2015)... -- Orexigen Therapeutics, Inc. (Nasdaq: OREX ) will announce ... May 8 before the market opens. The announcement will ... at 8:30 a.m. Eastern Time (5:30 a.m. Pacific Time). ... phone by calling (800) 708-4540 (domestic) or (847) 619-6397 ... live on the Investors section of the Orexigen web ...
(Date:5/5/2015)... , May 5, 2015  Indianapolis-based medical ... of its innovative line of products including the ... for atraumatically accessing deep-seated brain abnormalities and then ... been completed at more than 50 institutions throughout ... technology has also been included in 12 abstracts, ...
Breaking Biology Technology:Association of Southeastern Research Libraries Partners with Reprints Desk to Improve Access for Hard-to-Find Materials 2Association of Southeastern Research Libraries Partners with Reprints Desk to Improve Access for Hard-to-Find Materials 3Association of Southeastern Research Libraries Partners with Reprints Desk to Improve Access for Hard-to-Find Materials 4Bloor Research Positions AllegroGraph as a ‘Champion’ in Burgeoning Graph Database Market 2Bloor Research Positions AllegroGraph as a ‘Champion’ in Burgeoning Graph Database Market 3NICO Corporation Gains Market Expansion after Multiple Published Clinical Articles Support Access Technology for Deep Brain Lesions 2NICO Corporation Gains Market Expansion after Multiple Published Clinical Articles Support Access Technology for Deep Brain Lesions 3
... Web-based reporting credited with state's top healthcare ranking , , ... the state's web-based quality reporting system with the state's top ... Agency for Healthcare Research and Quality. , ,The ... quality score among all 50 states based on 129 measures ...
... company secrets. He thinks business meetings can be toxic as ... to improve the flow of communication, and he thinks employees ... , ,There is a method to Jason Fried's ... the recent Wisconsin Entrepreneurs' Conference in Milwaukee. , ,The founder ...
... - Using innovation to grow the top line will be ... 7:30 to 9 a.m., at the Butte des Morts Country ... open to the public, will center on innovation and adding value ... by Todd Teske, executive vice president and chief operating officer of ...
Cached Biology Technology:Visions: Chicago software exec Jason Fried breaks (almost) all the rules 2Visions: Chicago software exec Jason Fried breaks (almost) all the rules 3
The VersArray hybridization chamber is used for manual (coverslip) hybridization of microarrays. The chamber accommodates 2 slides and is watertight to allow incubation of slides in a water bath. Dim...
5X StabilCoat Immunoassay Stabilizer is a 5X concentrate solution of StabilCoat Immunoassay Stabilizer. The shelf-life of 5X StabilCoat Immunoassay Stabilizer is 2 years when stored at 4C. Product ...
... solid. PROTECT FROM LIGHT. Useful in cell activation experiments ... ≥98% by TLC. Soluble in DMSO or EtOH. ... 10 mM stock in DMSO is recommended. Microliter amounts ... O with rapid mixing (e.g. 10 μl into 5 ...
Monoclonal antibodies conjugated with rhodamine...
Biology Products: