NASA: NORTHERN OZONE POLLUTION SPURS ARCTIC WARMING

By Deborah Zabarenko
Reuters
March 14, 2006

//today.reuters.com/news/newsArticle.aspx?type=scienceNews&storyID=2006-03-14T205458Z_01_N14283840_RTRUKOC_0_US-ENVIRONMENT-ARCTIC.xml

WASHINGTON - Ozone pollution in the Northern Hemisphere, churned out by factories and vehicles that burn fossil fuels, is a major factor in the dramatic warming of the Arctic zone, NASA climate scientists reported on Tuesday.

This finding is surprising, since ozone has been considered a minor player in the study of global climate change, according to Drew Shindell, a research scientist at NASA's Goddard Institute for Space Studies in New York City.

Carbon dioxide has long been considered a key cause of overall global warming, because it remains in the atmosphere for a long time, Shindell said in a telephone interview.

But ozone -- the damaging, heat-trapping tropospheric ozone encountered at lower levels of the atmosphere, as opposed to the protective ozone observed at higher altitude -- was seen as fairly perishable and therefore less of a factor, he said.

Globally, ozone accounts for perhaps one-seventh of the global warming and climate change that carbon dioxide does, Shindell said. However, a new study of climate change over the past 100 years indicates that ozone may be responsible for as much as 50 percent of the warming in the Arctic zone.

This is because many of the world's most highly industrialized nations are in the Northern Hemisphere, and at relatively high latitudes. For most of the year, that means the ozone produced in these countries is blown by prevailing winds north and east, toward the Arctic Circle.

"Instead of being this tiny player, (ozone) can be more like 30 or 40 or even 50 percent of the cause of warming that we're seeing in the Arctic now," Shindell said. "It's very dramatic."

In computer models using climate data going back to 1880, environmental scientists found Arctic temperatures remained normal until about 1950. After that, the model shows higher temperatures, widely spread around the Arctic region.

This rise in temperatures is linked to the rise in tropospheric ozone at northern latitudes, Shindell said.

"Global warming has really taken off since the 1970s," he said. "The warming in the past several decades has been more than it was the whole previous record, which is about 100 years before that."

Arctic warming has been more extreme than global warming overall, he said, because as snow and ice melt they uncover darker-colored ground or water that absorb heat, accelerating warming.

More information and video is available online at: //tinyurl.com/gc5f8


Informant: NHNE

World-News

Independent Media Source

User Status

Du bist nicht angemeldet.

Suche

 

Aktuelle Beiträge

The Republican Party...
https://truthout.org/artic les/the-republican-party-i s-still-doing-donald-trump s-bidding/?eType=EmailBlas tContent&eId=804d4873-50dd -4c1b-82a5-f465ac3742ce
rudkla - 26. Apr, 05:36
January 6 Committee Says...
https://truthout.org/artic les/jan-6-committee-says-t rump-engaged-in-criminal-c onspiracy-to-undo-election /?eType=EmailBlastContent& eId=552e5725-9297-4a7c-a21 4-53c8c51615a3
rudkla - 4. Mär, 05:38
Georgia Republicans Are...
https://www.commondreams.o rg/views/2022/02/14/georgi a-republicans-are-delibera tely-attacking-voting-righ ts
rudkla - 15. Feb, 05:03
Now Every Day Is January...
https://www.commondreams.o rg/views/2022/02/07/now-ev ery-day-january-6-trump-ta rgets-vote-counters
rudkla - 8. Feb, 05:41
Trump's Political Depravity...
https://truthout.org/artic les/trumps-political-depra vity-sank-to-a-new-level-t his-past-week/?eType=Email BlastContent&eId=c66419ef- 902d-4088-8be5-ed3ee17ca2b f
rudkla - 6. Feb, 22:03

Archiv

März 2006
Mo
Di
Mi
Do
Fr
Sa
So
 
 
 
 
 

Status

Online seit 6213 Tagen
Zuletzt aktualisiert: 26. Apr, 05:36

Credits


Afghanistan
Animal Protection - Tierschutz
AUFBRUCH für Bürgerrechte, Freiheit und Gesundheit
Big Brother - NWO
Brasilien-Brasil
Britain
Canada
Care2 Connect
Chemtrails
Civil Rights - Buergerrechte - Politik
Cuts in Social Welfare - Sozialabbau
Cybermobbing
Datenschutzerklärung
Death Penalty - Todesstrafe
Depleted Uranium Poisoning (D.U.)
Disclaimer - Haftungsausschluss
... weitere
Profil
Abmelden
Weblog abonnieren