Navigation Links
Dirty snow may warm Arctic as much as greenhouse gases

oot through industry and fuel combustion, while forest and open-field fires account for the rest. Because of human activity, greenhouse gas levels have increased by one-third in the last two centuries.

“A one-third change in concentration is huge, yet the Earth has only warmed about .8 degrees because the effect is distributed globally,” Zender said. “A small amount of snow impurities in the Arctic have caused a significant temperature response there.”

Previous studies have analyzed dirty snow’s effect on climate, but this is the first to take into account realistic emissions from forest fires in the Northern Hemisphere and how warming affects the thickness of the snow pack.

In some polar areas, impurities in the snow have caused enough melting to expose underlying sea ice or soil that is significantly darker than the snow. The darker surfaces absorb sunlight more rapidly than snow, causing additional warming. This cycle causes temperatures in the polar regions to rise as much as 3 degrees Celsius during some seasons, the scientists say.

“Once the snow is gone, the soot that caused the snow to melt continues to have an effect because the ground surface is darker and retains more heat,” Zender said.

Dirty snow is prevalent in East Asia, Northern Europe and Northeastern United States.

Zender believes policymakers could use these research results to develop regulations to mitigate global warming. Limiting industrial soot emissions and switching to cleaner-burning fuels would leave snow brighter, he says. New snow falls each year, and if it contained fewer impurities, the ground would brighten and temperatures would cool. Carbon dioxide lives in the atmosphere for a century, so cutting back on emissions can prevent further warming but does not produce immediate cooling.
'"/>

Source:University of California - Irvine


Page: 1 2

Related biology news :

1. Grizzlies set to invade high Arctic?
2. Innovative collaboration brings Arctic science into the classroom
3. Census of Marine Life explorers surprised by diversity, density of Arctic creatures
4. Industrial contaminants spread by seabirds in High Arctic, new Canadian study shows
5. Lands surface change on Alaska tundra creating longer, warmer summers in Arctic
6. Displaced songbirds navigate in the high Arctic
7. Scientists to employ Arctic ice and polar bears to protect diversity of worlds crops
8. Arctic coring expedition continues to yield new clues
9. Arctic expedition will investigate alien-like glacier
10. Record air pollution above the Arctic
11. Pollutant haze heats the Arctic
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Dirty snow may warm Arctic much greenhouse gases

(Date:7/25/2014)... from the Terra satellite show the different areas that have ... Russia. The burn scars show up as reddish-brown splotches ... broken across the remote parts of Eastern Russia in the ... MODIS instrument, it is still possible to see the ... features noted below show the devastating number of fires that ...
(Date:7/25/2014)... and some of the smoke from those fires is drifting ... the Moderate Resolution Imaging Spectroradiometer (MODIS) aboard the Aqua satellite ... over the Great Lakes region of the United States. ... 23, 2014 (first image feature highlighted below) clearly shows the ... In the image, it is over Manitoba and parts ...
(Date:7/25/2014)... autism and disrupted brain development is an essential ... is largely unknown. However, thanks to funding from ... Washington University (GW) researcher Anthony-Samuel LaMantia, Ph.D. may ... answers to these key questions in the field ... pharmacology and physiology at the GW School of ...
Breaking Biology News(10 mins):GW researcher receives grant to answer the how and why of autism during development 2
... research in France on patients diagnosed with cryptococcosis ... patients infected by HIV and who are profoundly ... 5 2007 in PLoS Medicine, uncovers parameters associated ... sex and the infecting serotype. In light of ...
... In a venture once thought to lie outside the ... Beth Israel Deaconess Medical Center have captured and sequenced ... Tyrannosaurus rex. The protein fragments—seven in all—appear to most ... present day chickens, lending support to a recent and ...
... international consortium of researchers has published the genome sequence ... the chimpanzee and human genomes. Published April 13 in ... reveals that the three primate species share about 93 ... among their genes. , In its paper, the Rhesus ...
Cached Biology News:New recommendations against a major opportunistic infection -- cryptococcosis 2New recommendations against a major opportunistic infection -- cryptococcosis 3Protein fragments sequenced in 68 million-year-old Tyrannosaurus rex 2Protein fragments sequenced in 68 million-year-old Tyrannosaurus rex 3Protein fragments sequenced in 68 million-year-old Tyrannosaurus rex 4Analysis of rhesus monkey genome uncovers genetic differences with humans, chimps 2Analysis of rhesus monkey genome uncovers genetic differences with humans, chimps 3
(Date:7/25/2014)... Albany, New York (PRWEB) July 25, 2014 ... Transparency Market Research, "Biological Drugs Market - Global Industry ... 2020," the global biological drugs market is estimated at ... grow at a CAGR of 10.1% from 2014 to ... million in 2020. , The biological drugs market is ...
(Date:7/25/2014)... July 25, 2014 WABC Radio show out ... with Lorry Young will be hosting California-based Vet-Stem, Inc.’s ... stem cell therapy in pets. Dr. Harman first visited ... stem cell therapy for pets suffering from osteoarthritis and other ... Veterinary Medicine industry forward. , Young has invited Dr. Harman ...
(Date:7/25/2014)... The Conferee Networking committee is pleased to announce ... two-hour sessions provide a unique networking opportunity for attendees ... new techniques, or brainstorm new ideas in an informal ... consideration is August 31, 2014, and instructions can be ... will review the topics, and status notifications will be ...
(Date:7/25/2014)... 2014 Lawrence Livermore scientists Charles Westbrook ... list of " The World's Most Influential Scientific Minds ... 3,000 researchers who were identified by analyzing citation data ... published the highest-impact work (2002-2012 and 2012-2013). The two ... combustion modeling . , "This recognition is a great ...
Breaking Biology Technology:Biological Drugs Market: Global Industry Analysis, Size, Share, Growth, Trends and Forecast 2014 - 2020 2Biological Drugs Market: Global Industry Analysis, Size, Share, Growth, Trends and Forecast 2014 - 2020 3Robert J. Harman, DVM, Founder and CEO of Vet-Stem, Inc. to Join New York Radio Host Lorry Young in Upcoming Episode of A “Paws” For Your Pet 2Robert J. Harman, DVM, Founder and CEO of Vet-Stem, Inc. to Join New York Radio Host Lorry Young in Upcoming Episode of A “Paws” For Your Pet 3Pittcon 2015 Announces Call for Topics for Conferee Networking Sessions 2Scientists Burst onto Influential List for Combustion Research 2Scientists Burst onto Influential List for Combustion Research 3Scientists Burst onto Influential List for Combustion Research 4
... nothing in record numbers. , ,In 2003, an estimated 5 ... as LiveJournal , Movable Type , and Weblogger ... a New Year's resolution. , ,A November study of eight ... 20 percent of all blogs (short for "Web logs") are abandoned ...
... cursed) Sarbanes-Oxley Act of 2002 (Sarbox), many publicly ... financial recording and accounting practices and updated their ... whether privately held companies and non-profits should be ... public companies. Are taking these kinds of measures ...
... , a provider of business solutions that connect ... announced today that Hance Company of Plymouth, Minn., ... solution for integration directly with Hance's Ezone parts ... , ,Under the agreement, ARI will host ...
Cached Biology Technology:Who Gives a Blog? 2Sarbanes-Oxley for the Rest of Us 2Sarbanes-Oxley for the Rest of Us 3Sarbanes-Oxley for the Rest of Us 4