Navigation Links
Dirty snow causes early runoff in Cascades, Rockies
Date:1/12/2009

>

They found that changes to snow's brightness results in its melting weeks earlier in spring than with pristine snow. In addition, less mountain snow going into late spring means reduced runoff in late spring and summer. They will report their findings in an upcoming issue of the Journal of Geophysical Research -- Atmospheres.

Making Snowhills from Mountains

Researchers know that soot settles on snow. And like an asphalt street compared to a concrete sidewalk, dirty snow retains more heat from the sun than bright white snow. Qian and colleagues wanted to determine to what degree dark snow contributes to the declining snowpack.

To get the kind of detail from their computer model that they needed, the PNNL team used a regional model called the Weather Research and Forecasting model -- or WRF, developed in part at the National Center for Atmospheric Research in Boulder, Colo. Compared to planet-scale models that can distinguish land features 200 kilometers apart, this computer model zooms in on the landscape, increasing resolution to 15 kilometers. At 15 kilometers, features such as mountain ranges and soot deposition are better defined.

Recently, PNNL researchers added a software component to WRF that models the chemistry of tiny atmospheric particles called aerosols and their interaction with clouds and sunlight. Using the WRF-chem model, the team first examined how much soot in the form of so-called black carbon would land on snow in the Sierra Nevada, Cascade and Rocky Mountains.

Then the team simulated how that soot would affect the snow's brightness throughout the year. Finally, they translated the brightness into snow accumulation and melting over time.

Gray Outlook

"Earlier studies didn't talk about snowpack changes due to soot for two reasons," said atmospheric scientist and co-author William Gustafson. "Soot hasn't been widely measured in snowpack, and it's hard to accurately
'/>"/>

Contact: Mary Beckman
mary.beckman@pnl.gov
509-375-3688
DOE/Pacific Northwest National Laboratory
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Dirty air brings rain -- then again, maybe not
2. Myth about dirty old men supported by science
3. Dune and dirty: Hurricane teaches lessons through ecosystem research
4. Hidden interactions between predators and prey: evolution causes cryptic dynamics in ecology
5. Grubs passion for plastic causes water loss
6. St. Jude identifies the specific cell that causes eye cancer, disproving long-held theory
7. Influenza vaccine causes weaker immune response for children of rural Gabon than in semi-urban areas
8. First-ever study: lack of critical lubricant causes wear in joints
9. NIH selects LIAI for major study on allergy molecular causes and possible treatments
10. USC researchers explore genetic causes for male infertility
11. What are the causes and consequences of childhood obesity?
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Dirty snow causes early runoff in Cascades, Rockies
(Date:5/21/2015)... , May 21, 2015 ... "Thermal Imaging Market by Solutions (Hardware, Software, Services), by ... Automotive & others), by End-Users (Military & Defense ... by MarketsandMarkets, Thermal Imaging Market is expected to ... Million by 2020, at a Compound Annual Growth ...
(Date:5/19/2015)... -- Technology is rapidly advancing, outpacing enterprises, ability to secure ... and their management are soon to be rendered obsolete ... as those developed by the FIDO Alliance™. With the ... BYOD, COPE, IoT, and mobile payments, the interconnected online ... In response to the call for seamless, secure, ...
(Date:5/11/2015)... SAN JOSE, Calif. , May 11, 2015 ... leading developer of human interface solutions, today announced ... Senior Vice President and Chief Financial Officer, reporting ... Mr. Ali replaces Synaptics, current Chief Financial Officer, ... in December 2014. Mr. Ali ...
Breaking Biology News(10 mins):Thermal Imaging Market Worth $9,998.9 Million by 2020 2Thermal Imaging Market Worth $9,998.9 Million by 2020 3Thermal Imaging Market Worth $9,998.9 Million by 2020 4HYPR Corp. Biometric Security Integration Kit Shields Applications and Devices Across the Internet of Things 2HYPR Corp. Biometric Security Integration Kit Shields Applications and Devices Across the Internet of Things 3Synaptics Appoints Wajid Ali as Senior Vice President and Chief Financial Officer 2
... AWRE ), a leading technology innovator and supplier ... call to discuss the company,s operating results for the third ... Eastern Time. President and CEO Edmund Reiter and CFO Rick ... call is being webcast by Thomson and can be accessed ...
... slice it, watermelon has a lot going for it ... there,s more. Evidence from a pilot study led by food ... be an effective natural weapon against prehypertension, a precursor to ... its kind in humans. FSU Assistant Professor Arturo Figueroa and ...
... ,URBANA When you think about "wine country," Illinois may not ... big business on the prairie. There are 90 wineries licensed in ... wine grapes can bring as much as $8,000 in sales, though ... produce 90,000 gallons per year, while many produce 3,000 to 10,000 ...
Cached Biology News:Aware, Inc. Announces Q3'10 Earnings Conference Call 2Florida State study finds watermelon lowers blood pressure 2Florida State study finds watermelon lowers blood pressure 3Taming wild grapes for better wine 2Taming wild grapes for better wine 3
(Date:5/21/2015)... PLAINSBORO, N.J. (PRWEB) May 21, 2015 ... initial circulation audit and been admitted to BPA ... result, BPA Worldwide will track audience data for ... geographic coverage. , “By becoming a member ... steadfast dedication to providing our clients with the ...
(Date:5/21/2015)... 21, 2015  Prima Biomed Ltd. (NASDAQ: PBMD ... to become a leader in the development of immunotherapeutic ... the final CVac data from the Phase II CAN-003 ... for a clinically meaningful improvement in Overall Survival ("OS") ... In the group of second remission patients ...
(Date:5/21/2015)... , May 21, 2015  The EveryLife Foundation ... (R-UT) and Amy Klobuchar (D-MN) ... Accelerating Cures & Treatments, or OPEN ACT. ... patient advocacy organizations, this bipartisan legislation promises to ... medicines to rare disease patients by incentivizing drug ...
(Date:5/21/2015)... Worms, Germany (PRWEB) May 21, 2015 ... announces that its manufacturing facility in Worms, Germany ... EXCiPACT™, an independent subsidiary of the International Pharmaceutical ... three Grace facilities that produce its SYLOID® FP ... now received GMP certification, following the Curtis Bay, ...
Breaking Biology Technology:Specialty Pharmacy Times Joins BPA Worldwide 2Correction Continues after Big Move - BrokerBank Securities, Inc. 2Advocates Cheer Senate Leaders for Introducing Bipartisan Bill to Increase Number of Rare Disease Treatments 2Grace European Facility Receives GMP Excipient Certification for SYLOID® FP Silica Gel 2
... , SAN DIEGO, Dec. 10 Biomatrica, the ... release of SampleWare 3.1 software system for laboratory inventory, organization ... an audit trail functionality that tracks user and date stamps ... , The addition of the audit trail feature offers ...
... ... center in the country specifically established to treat adolescents and adults and is today the ... in its registry. , ... December 10, 2009 -- The Hertz Family Foundation of Santa Monica has announced that total ...
... Opinion Leaders Examine the Role ... Dec. 9 On Tuesday, December 8, 2009, Scientific American , the ... Decade-2 Education Forum in Washington, D.C. The forum was ... was sponsored by Amgen , a leading biotechnology company committed to science ...
Cached Biology Technology:Biomatrica Launches SampleWare 3.1 2Biomatrica Launches SampleWare 3.1 3Hertz Annual Appeal for Adult Congenital Heart Disease Center At UCLA Passes $2-Million Mark in Funds Raised Over Ten Years 2Hertz Annual Appeal for Adult Congenital Heart Disease Center At UCLA Passes $2-Million Mark in Funds Raised Over Ten Years 3Science Education Experts Discuss Solutions for Global Competitiveness at Scientific American Forum 2Science Education Experts Discuss Solutions for Global Competitiveness at Scientific American Forum 3
... reliable and compact GC-8A is Shimadzu's basic ... and simple to use, the GC-8A supports ... control, on column injection port(s), and analog ... models are available. The GC-8A is only ...
... system combines world-class performance hardware, Cerity Networked ... world-renowned support and columns, as well as ... that lets you reach uncompromising results and ... data. The Agilent 6820 GC system is ...
... Adding an exciting new chapter ... GC leadership, Agilents 7890A GC ... to take your lab to ... and GC/MS performance, including advanced ...
The essence of fluorescence analysis is sensitivity. The high throughput optical system in the RF-5301PC employs a blazed holographic grating, photomultiplier and digital signal processing to provide...
Biology Products: