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:6/1/2015)... June 1, 2015 According to ... Sensing Market by Technology (Touch-based & Touchless), Application (Consumer ... & by Geography - Global Forecast to 2020", published ... is expected to reach $23.55 Billion by 2020, at ... Browse 83 market data T ables ...
(Date:6/1/2015)... 2015 According to a ... by Application (Government, Military & Defense, Healthcare, Banking ... Security), Technology (Face Recognition, Fingerprint Recognition, Iris Recognition, ... and Others), Function (Contact and Non-Contact) & Geography ... Europe , APAC, Row) - Global Forecast ...
(Date:5/29/2015)... 28, 2015 Research and Markets ( ... "Facial Recognition Market by Solution, by Software, ... to 2020" report to their offering. ... recognition technology become more efficient and cost effective. ... and investment from the commercial sector. The development ...
Breaking Biology News(10 mins):Gesture Recognition & Touchless Sensing Market Worth $23.55 Billion by 2020 2Gesture Recognition & Touchless Sensing Market Worth $23.55 Billion by 2020 3Gesture Recognition & Touchless Sensing Market Worth $23.55 Billion by 2020 4Next Generation Biometrics Market Worth $24,448.84 Million by 2020 2Next Generation Biometrics Market Worth $24,448.84 Million by 2020 3Next Generation Biometrics Market Worth $24,448.84 Million by 2020 4Global advanced Facial Recognition Market Expected to Grow From $2.77 Billion in 2015 to $6.19 Billion in 2020, at an Estimated CAGR of 17.4% 2
... European Experts in the field of life in extreme ... Antarctic Survey offices in Cambridge (UK) to officially kick ... on life in Extreme Environments). , Life in Extreme ... Europe has considerable expertise but a relatively fragmented research ...
... of the oxygen we breathe today is being produced ... scientists heard today (Wednesday 2 April 2008) at the ... week at the Edinburgh International Conference Centre. About ... photosynthesising creatures called phytoplankton in the major oceans. These ...
... HARBOR, N.Y. (Tuesday, April 1, 2008) Identifying ... in the mouse used to be a monumental task. ... making it effective for even the smallest laboratories. ... ( www.cshprotocols.org/TOCs/toc4_08.dtl ) highlights a method for screening ...
Cached Biology News:Cold Spring Harbor Protocols features methods to screen genomes and analyze evolution 2
(Date:6/2/2015)... Through rare discovery of new physics and ... is enabling World Scientists to actually see, watch, and ... the full nature (position, shape, size, number) of molecules, ... Co-Founder of the Yancy Corporation, says, "Our rare discoveries ... come once in a lifetime, if at all. Our ...
(Date:6/2/2015)... GenoCAD , a platform leveraging ... expression, announced the formation of its new board of ... with a broad range of experience in the biotechnology, ... includes: , Jimmy Roussel, Entrepreneur in Residence at The ... in technology and marketing. He has served in operations ...
(Date:6/1/2015)... 2015 Research and ... addition of the "Oxidative Stress Assay ... Type (Indirect, Enzyme-based, Reactive Oxygen Species (ROS)-based), ... - Global Forecast to 2020" report ... http://photos.prnewswire.com/prnh/20130307/600769) , The global oxidative ...
(Date:6/1/2015)... , June 1, 2015 GenomeDx ... genomic analysis platform, successfully classified various subtypes ... expression of certain biomarkers, including one type ... this unique genomic signature has potential as ... neoadjuvant chemotherapy in patients with muscle-invasive bladder ...
Breaking Biology Technology:Scientists Eying Rare Discovery Of New Physics & Light Microscope Technology 2GenoCAD Announces New Board of Advisors, Improves Protein Expression Using Custom Gene Synthesis 2GenoCAD Announces New Board of Advisors, Improves Protein Expression Using Custom Gene Synthesis 3Oxidative Stress Assay Market 2015 - Global Forecast to 2020 2GenomeDx's Decipher Platform Validates Genomic Signature that may Predict Resistance to Chemotherapy in Bladder Cancer Patients in Study Presented at ASCO 2015 Annual Meeting 2GenomeDx's Decipher Platform Validates Genomic Signature that may Predict Resistance to Chemotherapy in Bladder Cancer Patients in Study Presented at ASCO 2015 Annual Meeting 3GenomeDx's Decipher Platform Validates Genomic Signature that may Predict Resistance to Chemotherapy in Bladder Cancer Patients in Study Presented at ASCO 2015 Annual Meeting 4
... Nov. 21 Gen-Probe,s (Nasdaq: GPRO ... new molecular tool to more,accurately detect high-risk human ... or precancerous lesions, according to nine,oral presentations and ... Gen-Probe researchers at the international conference of the,European ...
... of NC,s biotechnology sector is $45.8 billion, 180,007 jobs , ... Nov. 20 North Carolina has invested more than $1 ... years, and the annual economic impact exceeds $45 billion, according ... , , Norris Tolson, president ...
... Discovery Channel, will showcase the cutting edge technology and on-site laboratories ... ... (Vocus) November 20, 2008 -- Lake Erie Biofuels, LLC , ... biodiesel in the Northeastern United States and will soon be introduced ...
Cached Biology Technology:Promising Clinical Data on Gen-Probe's APTIMA(R) HPV Test Presented at Major European Medical Meeting 2Promising Clinical Data on Gen-Probe's APTIMA(R) HPV Test Presented at Major European Medical Meeting 3Promising Clinical Data on Gen-Probe's APTIMA(R) HPV Test Presented at Major European Medical Meeting 4Promising Clinical Data on Gen-Probe's APTIMA(R) HPV Test Presented at Major European Medical Meeting 5North Carolina's Biotechnology Investment Tops Billion-Dollar Mark; Battelle Study Quantifies Economic Dividends and Jobs 2North Carolina's Biotechnology Investment Tops Billion-Dollar Mark; Battelle Study Quantifies Economic Dividends and Jobs 3North Carolina's Biotechnology Investment Tops Billion-Dollar Mark; Battelle Study Quantifies Economic Dividends and Jobs 4North Carolina's Biotechnology Investment Tops Billion-Dollar Mark; Battelle Study Quantifies Economic Dividends and Jobs 5Discovery Channel to Feature Lake Erie Biofuels, LLC 2Discovery Channel to Feature Lake Erie Biofuels, LLC 3
Artisan™ Wash Solution (x 50) Additional Information: EU regulatory status: CE US regulatory status: IVD ...
MiniCycler thermal cycler with Hot Bonnet heated lid, holds 25x0.2ml tubes...
... RNA stain is used to stain and ... agarose gels and does not interfere with ... nm transilluminator, the stain emits a red-orange ... film or with a CCD camera-based gel ...
... mitochondrial transmembrane potential is one ... that occur following induction of ... Kit utilizes a lipophilic cation, ... mitochondrial activity marker. MitoLight partitions ...
Biology Products: