Posts tagged students
CU study: Melting glaciers are largely responsible for sea level rise
May 16th
While 99 percent of Earth’s land ice is locked up in the Greenland and Antarctic ice sheets, the remaining ice in the world’s glaciers contributed just as much to sea rise as the two ice sheets combined from 2003 to 2009, says a new study led by Clark University and involving the University Colorado Boulder.
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-
Pipe Bomb at Centaurus High School Suspect Arrested
May 14th
On Monday, 05/13/13, at approximately 9am officers of the Lafayette Police Department were dispatched to Centaurus High School located at 10300 South Boulder Road on the report of a possible explosive device located on campus.
Centaurus High School was placed on lockdown. Students were safely evacuated and transferred to nearby Ryan Elementary School.
Upon arriving on scene the responding Lafayette officers recognized the device to possibly be a pipe bomb and requested assistance from the Boulder County Bomb Squad. The FBI was also contacted and responded to the scene to assist with the investigation. The Boulder County Bomb Squad was able to render the device safe and recovered valuable evidence.
Bomb dogs and their handlers from around the metro area responded to the scene and by 2100 hours had completed searches of the school and the parking lot, including student vehicles that had been left behind when the school was evacuated. No other devices were located, all evidence indicated there were no additional threats to Centaurus High School and the area was determined safe. Students can respond to the school and pick up their vehicles at their convenience.
Due to the response and assistance of the Boulder County Bomb Squad, the FBI, the ATF and all other metro agencies who responded to the scene, the Lafayette Police Department identified a male Centaurus student as a person of interest.
Investigators worked throughout the night and arrested a 16 year old male Centaurus student in conjunction with the explosive device found at Centaurus High School. The juvenile male was located at his residence in Boulder County. Investigators searched the residence and located additional evidence. There is no known motive at this time, however the investigation is on-going.
The juvenile suspect has been arrested on the following charges:
1. Possession of Explosive/Incendiary Parts, 18-12-109(6), Class 4 Felony (for items found at the house), 2 Counts
2. Felony Menacing, 18-3-206, Class 5 Felony.
3. Interference of Educational Institution-Credible Threat w/Deadly Weapon, 18-9-109, Class 1 Misdemeanor.
Due to this being a juvenile suspect and an active investigation there will be no further information, press releases or interviews released by the Lafayette Police Department.
Lafayette PD news release
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Graduating seniors give CU Boulder high marks
May 8th
About four in five respondents reported satisfaction with their CU-Boulder education. A similar proportion would recommend CU-Boulder to a friend and nearly 98 percent of the seniors reported that their program of study met their educational goals.
The 2012 study is the latest edition of the senior survey, conducted 11 times since 1985 by CU-Boulder’s Office of Planning, Budget and Analysis, or PBA.
“The survey data clearly demonstrate that these students, from their perspective as seniors, judge the university in overwhelmingly positive terms,” said Michael Grant, CU-Boulder associate vice chancellor for undergraduate education. “CU-Boulder routinely invests a lot of time and energy in polling our senior students about their experiences, academic and otherwise, in order to continuously work toward improving those experiences.”
The online questionnaire was sent to 7,646 degree-seeking seniors and was completed by 2,890, or 38 percent, of the recipients. Comprising about 200 scaled items, plus four open-ended questions, the survey collected a massive amount of information including nearly 7,900 written comments.
The 2012 seniors’ ratings of CU-Boulder advising services were higher than those from any previous senior survey. The seniors’ satisfaction with numerous other CU-Boulder services, from libraries to information technology, was high and generally comparable to that of earlier cohorts.
“We use the survey results extensively to look at what’s popular and working well, to set goals to improve services, and even to pass along advice,” said Jim Davis Rosenthal, CU-Boulder director of orientation and director of the Office of Student Affairs Assessment. “Based on one of the survey questions, we are able to let incoming freshmen know what outgoing seniors wished they had gotten involved in. Other departments also use the results to encourage students to try opportunities they might not otherwise have considered. In a way, it’s like older siblings giving advice to their younger siblings.”
Large proportions of seniors said that if they were to start over at CU-Boulder, they would put more effort toward or spend more time on interacting with faculty (60 percent), career exploration (51 percent), and campus-related research projects, internships and applied experiences (45 percent).
Nearly two-thirds of seniors who expected to graduate by summer 2012 reported that their principal activity in fall 2012 was most likely to be paid employment, either full time (48 percent) or part time (15 percent). A combined 15 percent said they were most likely to be enrolled in graduate studies, professional school or other coursework. A combined 13 percent expected to go into military service, or pursue volunteer service, an internship, student teaching or travel.
The thousands of student comments included praise for various aspects of their major programs, suggestions for ways to enhance and improve major programs, and descriptions of ways in which their major program did or did not meet their educational goals.
One student wrote, “I feel that I am prepared to be an exceptional teacher after I graduate. The school had a lot to do with my preparedness.” Another wrote, “Excellent material, mostly great professors, and fantastic facilities all add up to a well-rounded education.”
The survey collects information on seniors’ satisfaction with their educational experiences at CU-Boulder and about their post-graduation plans. The survey’s findings are used primarily to provide systematic information for academic and service units to use in planning and improvement, and for use by prospective and current students, their advisers, and their families.
Preliminary results for the Seniors’ Future Plans Survey, which is separate from the comprehensive senior survey and which has been conducted each year since 2009, show a jump in full-time employment expectations. The initial data show that 54 percent of CU-Boulder seniors in 2013 expect full-time employment to be their principal activity after graduation, an increase from 48 percent in 2012. Expectations for part-time employment were reported by 15 percent of the 2013 seniors.
The 2012 questionnaire and comprehensive data from the senior survey, including summary reports from students in each of CU-Boulder’s schools and colleges and nearly 50 departments, are available athttp://www.colorado.edu/pba/surveys/senior/12/index.htm.
-CU-
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