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-
Buff Golfers are hungry for NCAA championship
May 15th
FAYETTEVILLE, Ark. — The University of Colorado men’s golf team is back in the NCAA Championships for the first time since 2009, as the Buffaloes are ready to go in the Central/Fayetteville Regional which begins here Thursday.
Colorado, ranked No. 58 in the nation (GolfStat; No. 67 Golfweek) is the No. 10 seed in the field is looking to advance to the NCAA Championship Finals for the first time since 2002.
The Buffs have been idle since May 1, when they finished 10th at the Pac-12 Championships in Los Angeles. CU was in position for a first division (top six) finish, but had a disastrous final day that dropped it from seventh into 10th.
“We really haven’t practiced since the Pac-12 Championship,” said head coach Roy Edwards. “That is by design. These guys are students first and they had their semester projects and finals until (last) Thursday. So they were all in with those responsibilities. Now they can clearly and fully focus on the task at hand.
“We’re absolutely hungry to get back out there,” he continued. “We had a really odd weather month leading up to the Pac-12 Championships and couldn’t get in the kind of practice we needed, yet we were still in decent position for an upper division finish. Most of the guys got a solid competition round in for U.S. Open Local Qualifying (Monday) to get the rust off. They’re anxious to get out there and prove that the final round (at Pac-12’s) was a blip on the season.”
The four Buffs who have played in all 12 tournaments (38 rounds) this season, seniors Jason Burstyn andDerek Fribbs, sophomore David Oraee and freshman Philip Juel-Berg along with junior Johnny Hayes will represent Colorado in the regional. Only Fribbs, as an individual last year, and Hayes, with his former school Towson State in 2010, have played in the postseason before.
For the Buffaloes to have a chance to advance to the Finals, which run May 28-June 2 in Atlanta, its No. 1 golfer this season, Burstyn, needs to rebound from an uncharacteristic poor performance at the Pac-12s, where he just wasn’t able to get anything going; he tied for 66th with a 33-over score of 313. Edwards expects him to back to his old self.
“He was a little off, and he’s no different than most in that he needs to keep learning to adapt to different situations,” Edwards said of his team’s stroke average leader (72.8). “He normally does that, and in this case, I think he’s ready to move on. History shows that the few times he has played poorly, he’s bounced back to play really well. I don’t think it will be any different this week.”
As for the team to have overall success, he pointed to what the Buffaloes did when they won the Air Force Falcon Invitational last September and the Bandon Dunes Championship in March.
“We have to minimize our mistakes, the focus has to be on being as smart as possible,” he noted. “We haven’t seen the course yet, but I understand it’s very difficult. It’s an event where you don’t care if you finish first or fifth. We need to be patient, make good decisions and overall manage our individual games. When we’ve done that, we’ve played our best, and if we can do that here, we have a great shot at advancing to the Finals.”
“If we are disciplined in our decisions at all times we have a great shot. The five teams who make the least number of controllable mistakes will advance. This has more to do about us doing our job than anything else.”
Arkansas is the host school, with The Blessings Golf Club serving as the host course; BGC has a 7,251-yard, par-72 layout (37-35 configuration) that was designed by Robert Trent Jones, Jr. It opened in 2004, and its rating (79.1) and slope (153) makes it one of the most difficult courses in the U.S., as its topography is characterized by hilly terrain creating numerous sidehill lies, dramatic elevation changes, forced carries over ravines and valleys, and large, undulating Bent grass greens, with Clear Creek in play on several holes. The fairways/roughs are Zoysia.
Colorado will tee off at 8:10 a.m. (MDT) on Thursday off the No. 10 tee, with the Buffs paired with Indiana (No. 11 seed) and UNC-Wilmington (No. 12). The field will be re-paired according to score after the first and second rounds, with all tee times between 8:20 and 10:20 a.m. for the second round (Friday) and between 7:50 and 9:50 a.m. for the final round (Saturday).
The top five teams and top two individuals who are not members of those squads will advance to the NCAA Championship Finals, which are scheduled for May 28-June 2 in Atlanta, Ga.
David Plati
Associate AD/Sports Information
University of Colorado Buffaloes
357 UCB / Fieldhouse Annex #50
Boulder, CO 80309-0357
303/492-5626 (office)
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2013 Hessie Trailhead Shuttle Program Meeting – May 21 in Nederland
May 15th
Come out and meet the summer rangers and learn about the 2013 Hessie Trailhead shuttle program − Tuesday, May 21 at 6 p.m. at the Nederland Community Library
Boulder County, Colo. – Boulder County will run a free shuttle service again on weekends and holidays from June 2 to Oct. 6 to carry passengers from Nederland Middle/Senior High School to the Hessie Trailhead, a popular entry point for accessing the Indian Peaks Wilderness Area.
The Hessie Trailhead shuttle program began last summer to address the issue of increased parking and traffic congestion on the way to the trailhead. This year it will be extended to include peak “leaf peeping” weekends in the fall.
While the trailhead itself is managed by the Arapaho & Roosevelt National Forests, the road that accesses the trailhead is managed and maintained by Boulder County. Parking near the trailhead and on nearby roads such as 4th of July Road is extremely limited, and Boulder County Parks & Open Space rangers are responsible for enforcing strict parking regulations in the area.
Rather than driving directly to the trailhead, visitors are encouraged to take the RTD ‘N’ bus to Nederland from Boulder or park at Nederland Middle/Senior High School and take the free shuttle instead.
An informational meeting to discuss updates to the shuttle program and to meet the rangers who will be in charge of parking enforcement this summer has been scheduled for Tuesday, May 21:
What: 2013 Hessie Shuttle Kickoff Meeting and Meet the Rangers Event
When: 6 p.m., Tuesday, May 21
Where: Nederland Community Library, 200 Hwy 72, Nederland (map)
It is not necessary to RSVP to the meeting, and family, friends and neighbors are all encouraged to attend.
Shuttle Service:
The shuttle service will begin Sunday, June 2 and will run from 8 a.m. to 8 p.m. on Saturdays and from 8 a.m. to 6 p.m. on Sundays throughout the summer. The shuttle will also run on holidays over the summer including Independence Day (July 4) and Labor Day (Sept. 2). This year, the shuttle operation schedule has been extended until Sunday, Oct. 6 to accommodate the peak autumn leaf season.
Details:
- Park and catch the free shuttle at Nederland Middle/Senior High School (map)
- Take RTD’s ‘N’ route from Boulder and transfer to the shuttle at Nederland Middle/Senior High School
- Shuttle arrives every 15 minutes
- Leashed dogs are welcome on board on the shuttle
- Parking is for day use only; overnight users should make other arrangements
If you are unable to attend the meeting and would like more information or you would like to provide feedback, visit www.HessieTrailhead.com or contact Scott McCarey at smccarey@bouldercounty.org or 720-564-2665.
