Weather
Boulder weather from Boulder Channel 1 News : Includes latest up to the minute weather forecasts from Nationals Weather Service in Boulder. Team coverage from Boulder Channel 1 News during Snow, and floods. See our weather on Twitter @BoulderCh1News and FaceBook Boulder Channel one. Be a weather watcher: write Boulder.BoulderChannel1@gmail.com or call News 303-447-8531
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.
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Campus Alerts system gets a test Friday
Dec 3rd
“As we saw during the recent floods, emergencies can happen quickly and without warning,” said Stuart Pike, CU-Boulder emergency management director. “The Campus Alerts system is our most effective means of communicating key safety messages to the campus community. It’s important for students, faculty and staff to be aware of this critical messaging platform.”
If the emergency involves a threat to personal safety or a campus closure, a campus alert will be sent using one or all of the communication methods available. Text messaging is the backbone of the system as it reaches the most individuals in the least amount of time.
More than 90 percent of CU-Boulder students, faculty and staff are registered for the Campus Alerts system and over 90 percent of those have at least one mobile device registered, according to Pike.
During an emergency that affects the campus, critical updates, additional details, and any necessary instructions regarding the nature of the emergency will be posted at http://alerts.colorado.edu, university social media sites, and on the campus Emergency Information Line at 303-492-4636 (303-492-INFO).
Active CU-Boulder student email addresses (@colorado.edu) are automatically registered and the university encourages students to add mobile phone numbers in order to receive text notifications as well. Faculty, staff, or affiliates of the CU-Boulder community with an @colorado.edu (or cufund.org, or cu.edu) e-mail address are encouraged to register on a voluntary basis. Additional information is available at http://alerts.colorado.edu.
Details on the decision process for determining a closure, how administrative leave should be handled for essential personnel and other employees, and answers to questions that frequently arise are covered in “Campus Closing Procedures During Emergencies” located at http://www.colorado.edu/policies/campus-closing-procedures-during-emergencies.
Any user who expected to receive an alert and didn’t, or who needs help signing up for the system, should call the IT Service Center at 303-735-HELP or email help@colorado.edu.
CU study: Global warming no hoax in the Eastern Canadian Arctic
Oct 23rd
Average summer temperatures in the Eastern Canadian Arctic during the last 100 years are higher now than during any century in the past 44,000 years and perhaps as long ago as 120,000 years, says a new University of Colorado Boulder study.
The study is the first direct evidence the present warmth in the Eastern Canadian Arctic exceeds the peak warmth there in the Early Holocene, when the amount of the sun’s energy reaching the Northern Hemisphere in summer was roughly 9 percent greater than today, said CU-Boulder geological sciences Professor Gifford Miller, study leader. The Holocene is a geological epoch that began after Earth’s last glacial period ended roughly 11,700 years ago and which continues today.
Miller and his colleagues used dead moss clumps emerging from receding ice caps on Baffin Island as tiny clocks. At four different ice caps, radiocarbon dates show the mosses had not been exposed to the elements since at least 44,000 to 51,000 years ago.
Since radiocarbon dating is only accurate to about 50,000 years and because Earth’s geological record shows it was in a glaciation stage prior to that time, the indications are that Canadian Arctic temperatures today have not been matched or exceeded for roughly 120,000 years, Miller said.
“The key piece here is just how unprecedented the warming of Arctic Canada is,” said Miller, also a fellow at CU-Boulder’s Institute of Arctic and Alpine Research. “This study really says the warming we are seeing is outside any kind of known natural variability, and it has to be due to increased greenhouse gases in the atmosphere.”
A paper on the subject appeared online Oct. 23 in Geophysical Research Letters, a journal published by the American Geophysical Union. Co-authors include CU-Boulder Senior Research Associate Scott Lehman, former CU-Boulder doctoral student and now Prescott College Professor Kurt Refsnider, University of California Irvine researcher John Southon and University of Wisconsin, Madison Research Associate Yafang Zhong. The National Science Foundation provided the primary funding for the study.
Miller and his colleagues compiled the age distribution of 145 radiocarbon-dated plants in the highlands of Baffin Island that were exposed by ice recession during the year they were collected by the researchers. All samples collected were within 1 meter of the ice caps, which are generally receding by 2 to 3 meters a year. “The oldest radiocarbon dates were a total shock to me,” said Miller.
Located just east of Greenland, the 196,000-square-mile Baffin Island is the fifth largest island in the world. Most of it lies above the Arctic Circle. Many of the ice caps on the highlands of Baffin Island rest on relatively flat terrain, usually frozen to their beds. “Where the ice is cold and thin, it doesn’t flow, so the ancient landscape on which they formed is preserved pretty much intact,” said Miller.
To reconstruct the past climate of Baffin Island beyond the limit of radiocarbon dating, Miller and his team used data from ice cores previously retrieved by international teams from the nearby Greenland Ice Sheet.
The ice cores showed that the youngest time interval from which summer temperatures in the Arctic were plausibly as warm as today is about 120,000 years ago, near the end of the last interglacial period. “We suggest this is the most likely age of these samples,” said Miller.
The new study also showed summer temperatures cooled in the Canadian Arctic by about 5 degrees Fahrenheit from roughly 5,000 years ago to about 100 years ago – a period that included the Little Ice Age from 1275 to about 1900.
“Although the Arctic has been warming since about 1900, the most significant warming in the Baffin Island region didn’t really start until the 1970s,” said Miller. “And it is really in the past 20 years that the warming signal from that region has been just stunning. All of Baffin Island is melting, and we expect all of the ice caps to eventually disappear, even if there is no additional warming.”
Temperatures across the Arctic have been rising substantially in recent decades as a result of the buildup of greenhouse gases in Earth’s atmosphere. Studies by CU-Boulder researchers in Greenland indicate temperatures on the ice sheet have climbed 7 degrees Fahrenheit since 1991.
A 2012 study by Miller and colleagues using radiocarbon-dated mosses that emerged from under the Baffin Island ice caps and sediment cores from Iceland suggested that the trigger for the Little Ice Age was likely a combination of exploding tropical volcanoes – which ejected tiny aerosols that reflected sunlight back into space – and a decrease in solar radiation.
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