Posts tagged Ice
Bad weather a-comin’ City gets ready
Dec 3rd
Like other Front Range communities, the city does not typically plow residential streets since most snow melts within a day or two and residential plowing would significantly increase costs, impacting other high-priority services. During most snowstorms, one “floater” snow plow responds to requests from the community and public safety personnel. When snowfall exceeds 12 inches, the city strategically services known problem areas on some residential streets. To request plowing on a specific residential street, make a “Snow Plow Request” online via www.inquireboulder.com or call Snow Dispatch at 303-413-7109.
Residential Street Plowing Pilot Program
In response to community feedback, the City of Boulder is also implementing a residential street plowing pilot program between Dec. 1, 2013, and March 1, 2014. Two snow plows will be sent to 10 pre-identified residential areas when both of the following criteria are met:
- eight inches or more of snow is predicted or actually accumulates (not including snowpack already on the road surface); and
- daytime temperatures are predicted to remain below freezing for the 72 hours after the snowstorm.
If both criteria are met and the pilot program is activated, the city will post a notification on the Snow and Ice Removal Web page. View the “Residential Street Plowing Pilot Program Map” atbouldercolorado.gov/links/fetch/18735 to see the specific neighborhood streets where snow plows may be deployed as part of the pilot program.
Safety Tips
To make winter travel safer:
- give snow plows and spreader trucks plenty of room to operate;
- allow for more stopping distance on icy or snowy roads;
- avoid making last-minute decisions;
- teach your children to be extra careful around traffic; and
- use extra caution as you walk and bike in icy conditions.
Do not pass snow plows or spreader trucks, which are both wider than one traffic lane. This will help you avoid potential accidents, windshield damage and limited visibility caused by flying snow and ice.
Sidewalk Snow and Ice Removal
Property owners, landlords and tenants must remove snow and ice from their sidewalks within 24 hours after snow stops falling. Clearing sidewalks in a timely manner makes travel safer for all pedestrians. Failure to remove snow from sidewalks before the 24-hour deadline may result in fines and/or abatement, which involves paying for a private snow removal contractor to clear the sidewalks. If the city incurs costs related to abatement, these will be passed on to the property owner.
Visit bouldercolorado.gov/links/fetch/9834 to view official snowfall reports from the National Weather Service. To report sidewalk violations, make a service request for “Sidewalk Snow & Ice Removal” online viawww.inquireboulder.com or call Code Enforcement at 303-441-3333.
Seniors and disabled residents who are physically unable to remove snow from their sidewalks may receive volunteer assistance through the Boulder County CareConnect Ice Busters program. Visit www.careconnectbc.org or call 303-443-1933 ext. 413 to volunteer or ext. 416 to request assistance.
For more detailed information about the city’s snow and ice removal operations, visitwww.bouldercolorado.gov/public-works and select the “Snow and Ice Removal” link.
— CITY —
CU study: Melting glaciers are largely responsible for sea level rise
May 16th
The new research found that all glacial regions lost mass from 2003 to 2009, with the biggest ice losses occurring in Arctic Canada, Alaska, coastal Greenland, the southern Andes and the Himalayas. The glaciers outside of the Greenland and Antarctic sheets lost an average of roughly 260 billion metric tons of ice annually during the study period, causing the oceans to rise 0.03 inches, or about 0.7 millimeters per year.
The study compared traditional ground measurements to satellite data from NASA’s Ice, Cloud and Land Elevation Satellite, or ICESat, and the Gravity Recovery and Climate Experiment, or GRACE, missions to estimate ice loss for glaciers in all regions of the planet.
“For the first time, we’ve been able to very precisely constrain how much these glaciers as a whole are contributing to sea rise,” said geography Assistant Professor Alex Gardner of Clark University in Worcester, Mass., lead study author. “These smaller ice bodies are currently losing about as much mass as the ice sheets.”
A paper on the subject is being published in the May 17 issue of the journal Science.
“Because the global glacier ice mass is relatively small in comparison with the huge ice sheets covering Greenland and Antarctica, people tend to not worry about it,” said CU-Boulder Professor Tad Pfeffer, a study co-author. “But it’s like a little bucket with a huge hole in the bottom: it may not last for very long, just a century or two, but while there’s ice in those glaciers, it’s a major contributor to sea level rise,” said Pfeffer, a glaciologist at CU-Boulder’s Institute of Arctic and Alpine Research
ICESat, which ceased operations in 2009, measured glacier changes using laser altimetry, which bounces laser pulses off the ice surface to determine changes in the height of ice cover. The GRACE satellite system, still operational, detects variations in Earth’s gravity field resulting from changes in the planet’s mass distribution, including ice displacements.
GRACE does not have a fine enough resolution and ICESat does not have sufficient sampling density to study small glaciers, but mass change estimates by the two satellite systems for large glaciated regions agree well, the scientists concluded.
“Because the two satellite techniques, ICESat and GRACE, are subject to completely different types of errors, the fact that their results are in such good agreement gives us increased confidence in those results,” said CU-Boulder physics Professor John Wahr, a study co-author and fellow at the university’s Cooperative Institute for Research in Environmental Sciences.
Ground-based estimates of glacier mass changes include measurements along a line from a glacier’s summit to its edge, which are extrapolated over a glacier’s entire area. Such measurements, while fairly accurate for individual glaciers, tend to cause scientists to overestimate ice loss when extrapolated over larger regions, including individual mountain ranges, according to the team.
Current estimates predict if all the glaciers in the world were to melt, they would raise sea level by about two feet. In contrast, an entire Greenland ice sheet melt would raise sea levels by about 20 feet, while if Antarctica lost its ice cover, sea levels would rise nearly 200 feet.
The study involved 16 researchers from 10 countries. In addition to Clark University and CU-Boulder, major research contributions came from the University of Michigan, the Scripps Institution of Oceanography in San Diego, Trent University in Ontario, Canada, and the University of Alaska Fairbanks.
Built by Ball Aerospace & Technologies in Boulder, NASA’s ICESat satellite was successfully operated from the CU-Boulder campus by a team made up primarily of undergraduates from its launch in 2003 to its demise in 2009 when the science payload failed. The students participated in the unusual decommissioning of a functioning satellite in 2010, bringing the craft into Earth re-entry to burn up. ICESat’s successor, ICESat-2, is slated for launch in 2016 by NASA.
-CU media release-
Frozen Dead Guy Daze
Feb 2nd
Frozen Dead Guy Daze, started in 2002, is an annual celebration held in the town of Nederland, Colorado to loosely celebrate, through a theme of frozen,ice,blue,winter, the 1994 discovery of the cryonic state corpse of Bredo Morstel.