Navigation Links
River ice reveals new twist on Arctic melt
Date:4/2/2014

A new study led by Lance Lesack, a Simon Fraser University geographer and Faculty of Environment professor, has discovered unexpected climate-driven changes in the mighty Mackenzie River's ice breakup. This discovery may help resolve the complex puzzle underlying why Arctic ice is disappearing more rapidly than expected.

Lesack is the lead author on Local spring warming drives earlier river-ice breakup in a large Arctic delta. Published recently in Geophysical Research Letters, the study has co-authors at Wilfrid Laurier University, the University of Alberta and Memorial University.

Its goal was to understand how warming global temperatures and the intensifying Arctic hydrological cycle associated with them may be driving increasing water discharges and more rapid ice breakup in the Arctic's great rivers.

But the researchers stumbled upon an unexpected phenomenon while trying to figure out why the Mackenzie River's annual ice breakup has been shortening even though its water discharge isn't increasing, as in Russian rivers.

Just slightly warmer springs with unexpected snowfall declines rather than warmer winters or increasing river discharge, as previously suspected can drive earlier-than-expected ice breakup in great Arctic rivers.

The Mackenzie exemplifies this unexpected phenomenon. The researchers discovered this by accessing records dating back to 1958 of the river's water levels, snow depths, air temperatures and times of ice breakup.

This finding is significant, as Arctic snow and ice systems are important climate-system components that affect the Earth's ability to reflect solar radiation.

"Our surprising finding was that spring temperatures, the period when river-ice melt occurs, had warmed by only 3.2 degrees Celsius. Yet this small change was responsible for more than 80 per cent of the variation in the earlier ice breakups, whereas winter temperatures had warmed by 5.3 degrees
'/>"/>

Contact: Carol Thorbes
cthorbes@sfu.ca
778-782-3035
Simon Fraser University
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Change the Course to restore 1 billion gallons of water to Colorado River Delta
2. West Virginia chemical spill into Elk River contaminating air and water quality
3. Uncovering the drivers of honey bee colony declines and losses
4. Streamflow alteration impacts fish diversity in local rivers
5. Ancient sharks reared young in prehistoric river-delta nursery
6. Temperature found to be most significant driver of the worlds tallest trees
7. Argonne partners with Metropolitan Water Reclamation District to study Chicago River microbe population
8. 2 grants to UC Riverside boost scientists efforts in developing improved cowpea varieties
9. New research illustrates Mississippi Rivers role
10. Illinois river otters exposed to chemicals banned decades ago
11. Dams provide resilience to Columbia River basin from climate change impacts
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/10/2014)... , Dec. 9, 2014  Wake Forest Baptist Medical Center ... for its School of Medicine. Funding for this $50 ... campaign that will be publicly launched next summer. ... in the former 60 series R.J. Reynolds Tobacco Company ... Construction will begin immediately with plans to be ready ...
(Date:12/10/2014)... 9, 2014     ...   Jifflenow, a ... solutions for business-to-business (B2B) events, today announced a ... mobile near-field communication (NFC), Bluetooth low energy (BLE), ... http://photos.prnewswire.com/prnh/20140612/691055) , Jifflenow will integrate its ...
(Date:12/4/2014)... , Dec. 3, 2014  Crossmatch™, a ... announced that its DigitalPersona ® Pro Enterprise ... have been deployed throughout First Bank branch locations ... South Carolina and Virginia. First Bank, ... Southern Pines, North Carolina , selected ...
Breaking Biology News(10 mins):Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 2Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 3Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 4Jifflenow And ITN International Bring Cutting-Edge Badge Scanning Technology To B2B Events 2Jifflenow And ITN International Bring Cutting-Edge Badge Scanning Technology To B2B Events 3First Bank Partners with Crossmatch to Increase Log In Security 2First Bank Partners with Crossmatch to Increase Log In Security 3
... National Science Foundation has approved a $1.3 million ... the University of Oklahoma to discover new kinds ... will enable scientists to detect, identify, and isolate ... a sulfur spring in southwestern Oklahoma. "During ...
... the Bush administration,s Aug. 15 proposal to reinterpret ... changes eliminating the requirement for federal projects to ... federal agencies to decide for themselves whether their ... "The concept of independent scientific review has been ...
... For just one late-summer night each year, the shallow waters ... spawn of elkhorn corals -- the tiny, round packets of ... Baums, assistant professor of biology at Penn State, was there ... and education project to grow the newborn juvenile corals for ...
Cached Biology News:NSF approves $1.3M for OSU and OU microbes hunt 2Ecological Society of America criticizes administration's overhaul of the Endangered Species Act 2Research expedition on corals and global warming: Aug. 17-26 in Puerto Rico 2Research expedition on corals and global warming: Aug. 17-26 in Puerto Rico 3Research expedition on corals and global warming: Aug. 17-26 in Puerto Rico 4
(Date:12/17/2014)... 2014 “Never say, ‘I cannot ... Marburg’s Department of Physics, advises young women pursuing ... released SPIE Women in Optics 18-month planner ... to ask questions.” , In the annual planner, ... occupations ranging from university professor and laboratory researcher ...
(Date:12/17/2014)... 17, 2014 Xeno Diagnostics has ... its most recent COLA inspection. Xeno has met ... national healthcare accreditation organization. Accreditation is earned only ... in day-to-day operations, demonstrate continued accuracy in the ... on-site laboratory survey. , While the ...
(Date:12/17/2014)... Md. , Dec. 17, 2014 CASI ... company dedicated to the acquisition, development and commercialization of ... for the global market with a primary commercial focus ... it has been granted a Type C meeting with ... the meeting will be held in February 2015.  During ...
(Date:12/15/2014)... Dec. 15, 2014 Organovo Holdings, Inc. ... focused on delivering breakthrough 3D bioprinting technology,  today ... collaborators of its exVive3D TM Human Liver ... in full commercial release on November 18, has ... in several awards for innovation. Most ...
Breaking Biology Technology:Network, Multitask, Persevere: SPIE Women in Optics Planner Subjects Share from Experience 2Network, Multitask, Persevere: SPIE Women in Optics Planner Subjects Share from Experience 3Xeno Diagnostics Receives 3rd Award for Laboratory Excellence 2CASI Pharmaceuticals Granted Type C Meeting With U.S. FDA For ENMD-2076 In Fibrolamellar Carcinoma 2CASI Pharmaceuticals Granted Type C Meeting With U.S. FDA For ENMD-2076 In Fibrolamellar Carcinoma 3CASI Pharmaceuticals Granted Type C Meeting With U.S. FDA For ENMD-2076 In Fibrolamellar Carcinoma 4CASI Pharmaceuticals Granted Type C Meeting With U.S. FDA For ENMD-2076 In Fibrolamellar Carcinoma 5Organovo Celebrates a Positive 2014 Reception of its exVive3DTM Human Liver Tissue Product 2Organovo Celebrates a Positive 2014 Reception of its exVive3DTM Human Liver Tissue Product 3
... ... in 2009, to $295M worldwide; and is forecasted to reach $4B in 2015. , ... San Francisco, CA (PRWEB) June 28, ... enhance and treat cognition, or digital brain health and fitness tools, grew 35% ...
... ... Way as First in Arizona ,with State of the Art 3D Dedicated Neurology Suite, ... (PRWEB) June ... the first institution in the state of Arizona to adopt TrueVision® 3D Surgical Visualization, ...
... June 27, 2010 , , , ... Outstanding Young Women Biologists, Chemists, Physicists and,Mathematicians Recognized Across the Developing World , ... The Elsevier Foundation, TWAS and TWOWS announced today that ... Asia , Latin America and the Caribbean for their research excellence. ...
Cached Biology Technology:New Report Finds A Brain Health Revolution in the Making, Driven by Digital Technology and Neuroplasticity Research 2New Report Finds A Brain Health Revolution in the Making, Driven by Digital Technology and Neuroplasticity Research 3New Report Finds A Brain Health Revolution in the Making, Driven by Digital Technology and Neuroplasticity Research 4New Report Finds A Brain Health Revolution in the Making, Driven by Digital Technology and Neuroplasticity Research 5Cardon Children's Medical Center Adopts TrueVision 3D Surgical Visualization Platform for Department of Pediatric Neurosurgery 2Twelve Women Scientists Announced as Winners of Elsevier Foundation TWOWS Awards 2Twelve Women Scientists Announced as Winners of Elsevier Foundation TWOWS Awards 3Twelve Women Scientists Announced as Winners of Elsevier Foundation TWOWS Awards 4Twelve Women Scientists Announced as Winners of Elsevier Foundation TWOWS Awards 5Twelve Women Scientists Announced as Winners of Elsevier Foundation TWOWS Awards 6Twelve Women Scientists Announced as Winners of Elsevier Foundation TWOWS Awards 7
Alkali soluble casein is the recommended blot blocking reagent for use with the HisTag Monoclonal Antibody (Novagen) on Western blots....
Phospho-Btk (Tyr223) Antibody...
Goat polyclonal to Dysadherin ( Abpromise for all tested applications). entrezGeneID: 53827...
UBC13 Antibody...
Biology Products: