Posts tagged NASA
CU Boulder sends high school students experiments into space
Sep 11th
The two winning experiments — one of which tests the ability of spiders to learn how to catch prey in the low-gravity of space, and the other which investigates how nutrients and compounds affect virulent bacteria growth in space — were announced in March. The contest is sponsored by YouTube, Lenova and Space Adventures with the involvement of NASA, the European Space Agency and the Japanese Space Agency.
“We took the ideas of the two winning experiments and transformed them into actual experiments that could be conducted in space,” said Stefanie Countryman, the business manager and outreach coordinator for BioServe Space Technologies, a NASA-sponsored center located in CU-Boulder’s aerospace engineering sciences department. The CU team also manifested the payload on an unmanned Japanese HTV rocket, conducted safety verifications and trained the astronaut flight crew on using BioServe hardware aboard the International Space Station, or ISS, for the project.
The global initiative sponsoring the contest is a new program known as YouTube Space Lab. YouTube Space Lab is one component of YouTube for Schools, a program that allows educators to access YouTube’s broad library of educational content from inside their school network. The contest generated more than 2,000 entries.
The student winners are Amr Mohamed, 18, of Alexandria, Egypt, who developed the idea for the spider experiment, and Dorothy Chen and Sara Ma, both 16, of Troy, Mich., who created the idea for the bacteria study. BioServe completed all of the mission integration and operations work for the two experiments and hand-delivered the loaded space flight hardware to the Tanegashima National Space Flight Center in Japan for launch to ISS on July 21.
The live, 45-minute YouTube Space Lab program stream from ISS, slated for 8:30 a.m. MDT on Sept. 13 will be hosted by Bill Nye “The Science Guy” and will include Mohamed, Chen and Ma. The winning experiments — selected by a panel that included British theoretical physicist Stephen Hawking, two NASA administrators, European Space Agency and Japanese Space Agency astronauts and Cirque de Soleil founder Guy Laliberte — will be performed by NASA astronaut Sunita Williams.
Countryman, who also will be part of the YouTube Space Lab live stream as she describes the role of BioServe in the project to Nye, said she was surprised by the sophistication of some of the experiments entered in the contest. “Seeing the level of intellect, not only from the top two winners but from six regional winners, makes us feel confident in the next generation of scientists and engineers,” she said.
Countryman said BioServe worked closely with Paula Cushing at the Denver Museum of Nature and Science and MaryAnn Hamilton of the Butterfly Pavilion in Westminster, Colo., to obtain the jumping spiders and analyze their behavior. BioServe designed, developed and built the flight habitat for the spiders. Once aboard ISS, the habitat will be placed inside a BioServe-built device known as a Commercial Generic Bioprocessing Apparatus, or CGBA.
In addition, BioServe worked with AgraQuest in Davis, Calif., a company that manufactures and sells the bacteria strain B. subtilis, which will be used in the experiment by Chen and Ma. BioServe researchers worked with the students to design the experiment, which included 48 fluid processing devices carried in six Group Activation Packs built by BioServe and which have flown on dozens of space missions.
BioServe also developed an HD camera system to record high-resolution still images and HD video of the spider habitat, which included both the arachnids and their food, fruit flies, Countryman said. One of BioServe’s CGBA devices on board ISS is providing power for the lighting system of the spider habitat and thermal control for both experiments, said Countryman.
As part of the contest, 14- to 18-year-olds, either alone or in groups of up to three, submitted videos describing their experiments to YouTube. All experiments submitted to the contest had to involve either biology or physics. People tuned into the YouTube Space Lab event can vote for their favorite experiments, Countryman said.
“For decades, one of our major thrusts at CU-Boulder’s BioServe Space Technologies has been to provide educational opportunities for hundreds of thousands of K-12 students around the world,” said Countryman. “This has been another opportunity for us to work with students on space payloads, a unique project that we hope will help steer many students from around the world into careers in the sciences.”
BioServe is a nonprofit, NASA-funded center founded in 1987 at CU-Boulder to develop new or improved products through space life science research in partnership with industry, academia and government, said BioServe Director Louis Stodieck. Since 1991 BioServe has flown payloads on 40 NASA space shuttle microgravity missions and additional payloads on several Russian and Japanese space vehicles.
YouTube, a video-sharing website, is a subsidiary of Google. Lenovo, a global company headquartered in Morrisville, N.C., is the world’s third-largest PC maker. Space Adventures, headquartered in Vienna, Va., provides flights for private citizens into space, including trips to the ISS.
To watch the winning experiments being performed on ISS go to http://www.youtube.com/spacelab. For more information on BioServe visithttp://www.colorado.edu/engineering/BioServe/.
CU led mountain forest study shows vulnerability to climate change
Sep 9th
Forests where people live and play to be hit hardest
Led by CU-Boulder researcher Ernesto Trujillo and Assistant Professor Noah Molotch, the study team used the data — including satellite images and ground measurements — to identify the threshold where mid-level forests sustained primarily by moisture change to higher-elevation forests sustained primarily by sunlight and temperature. Being able to identify this “tipping point” is important because it is in the mid-level forests — at altitudes from roughly 6,500 to 8,000 feet — where many people live and play in the West and which are associated with increasing wildfires, beetle outbreaks and increased tree mortality, said Molotch.
“Our results provide the first direct observations of the snowpack-forest connections across broad spatial scales,” said Molotch, also a research scientist at CU-Boulder’s Institute of Arctic and Alpine Research. “Finding the tipping point between water-limited forests and energy-limited forests defines for us the region of the greatest sensitivity to climate change — the mid-elevation forests — which is where we should focus future research.”
While the research by Molotch and his team took place in the Sierra Nevada mountain range in California, it is applicable to other mountain ranges across the West, he said. The implications are important, since climate studies indicate the snowpack in mid-elevation forests in the Western United States and other similar forests around the world has been decreasing in the past 50 years because of regional warming.
Forests are drying and becoming more vulnerable
“We found that mid-elevation forests show a dramatic sensitivity to snow that fell the previous winter in terms of accumulation and subsequent melt,” said Molotch, also a scientist at NASA’s Jet Propulsion Laboratory in Pasadena, Calif. “If snowpack declines, forests become more stressed, which can lead to ecological changes that include alterations in the distribution and abundance of plant and animal species as well as vulnerability to perturbations like fire and beetle kill.”
A paper on the subject was published online Sept. 9 in Nature Geosciences. Co-authors on the study include Ernesto Trujillo of INSTAAR and the Ecole Polytechnique Fédérale de Lausanne in Switzerland, Michael Golden and Anne Kelly of the University of California, Irvine, and Roger Bales of the University of California, Merced. The National Science Foundation and NASA funded the study.
Molotch said the study team attributed about 50 percent of the greenness in mid-elevation forests by satellites to maximum snow accumulation from the previous winter, with the other 50 percent caused by conditions like soil depth, soil nutrients, temperature and sunlight. “The strength of the relationship between forest greenness and snowpack from the previous year was quite surprising to us,” Molotch said.
The research team initially set out to identify the various components of drought that lead to vegetation stress, particularly in mountain snowpack, said Molotch. “We went after snowpack in the western U.S. because it provides about 60 to 80 percent of the water input in high elevation mountains.”
The team used 26 years of continuous data from the Advanced Very High Resolution Radiometer, a space-borne sensor flying on a National Oceanic and Atmospheric Administration satellite, to measure the forest greenness. The researchers compared it to long-term data from 107 snow stations maintained by the California Cooperative Snow Survey, a consortium of state and federal agencies.
In addition, the researchers used information gathered from several “flux towers” in the southern Sierra Nevada mountain range, which measure the exchanges of carbon dioxide, water vapor and energy between terrestrial ecosystems and the atmosphere. Instruments on the towers, which are roughly 100 feet high, allowed them to measure the sensitivity of both mid-level and high-level mountainous regions in both wet and dry years — data that matched up well with the satellite and ground data, he said.
“The implications of this study are profound when you think about the potential for ecological change in mountainous environments in the West in the not too distant future,” said Molotch, an assistant professor in the geography department. “If we take our study and project forward in time when climate models are calling for warming and drying conditions, the implication is that forests will be increasingly water-stressed in the future and thus more vulnerable to fires and insect outbreaks.
“When you put this into the context of recent losses in Colorado and elsewhere in the West to forest fire devastation, then it becomes something we really have to pay attention to,” he said. “This tipping-point elevation is very likely to migrate up the mountainsides as the climate warms.”
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Arctic sea ice reaches lowest extent ever recorded, says CU-Boulder research team
Aug 27th
On Aug. 26, the Arctic sea ice extent fell to 1.58 million square miles, or 4.10 million square kilometers. The number is 27,000 square miles, or 70,000 square kilometers below the record low daily sea ice extent set Sept. 18, 2007. Since the summer Arctic sea ice minimum normally does not occur until the melt season ends in mid- to late September, the CU-Boulder research team expects the sea ice extent to continue to dwindle for the next two or three weeks, said Walt Meier, an NSID scientist.
“It’s a little surprising to see the 2012 Arctic sea ice extent in August dip below the record low 2007 sea ice extent in September,” he said. “It’s likely we are going to surpass the record decline by a fair amount this year by the time all is said and done.”
On Sept. 18, 2007, the September minimum extent of Arctic sea ice shattered all satellite records, reaching a five-day running average of 1.61 million square miles, or 4.17 million square kilometers. Compared to the long-term minimum average from 1979 to 2000, the 2007 minimum extent was lower by about a million square miles — an area about the same as Alaska and Texas combined, or 10 United Kingdoms.
While a large Arctic storm in early August appears to have helped to break up some of the 2012 sea ice and helped it to melt more quickly, the decline seen in in recent years is well outside the range of natural climate variability, said Meier. Most scientists believe the shrinking Arctic sea ice is tied to warming temperatures caused by an increase in human-produced greenhouse gases pumped into Earth’s atmosphere.
CU-Boulder researchers say the old, thick multi-year ice that used to dominate the Arctic region has been replaced by young, thin ice that has survived only one or two melt seasons — ice which now makes up about 80 percent of the ice cover. Since 1979, the September Arctic sea ice extent has declined by 12 percent per decade.
The record-breaking Arctic sea ice extent in 2012 moves the 2011 sea ice extent minimum from the second to the third lowest spot on record, behind 2007. Meier and his CU-Boulder colleagues say they believe the Arctic may be ice-free in the summers within the next several decades.
“The years from 2007 to 2012 are the six lowest years in terms of Arctic sea ice extent in the satellite record,” said Meier. “In the big picture, 2012 is just another year in the sequence of declining sea ice. We have been seeing a trend toward decreasing minimum Arctic sea ice extents for the past 34 years, and there’s no reason to believe this trend will change.”
The Arctic sea ice extent as measured by scientists is the total area of all Arctic regions where ice covers at least 15 percent of the ocean surface, said Meier.
Scientists say Arctic sea ice is important because it keeps the polar region cold and helps moderate global climate — some have dubbed it “Earth’s air conditioner.” While the bright surface of Arctic sea ice reflects up to 80 percent of the sunlight back to space, the increasing amounts of open ocean there — which absorb about 90 percent of the sunlight striking the Arctic — have created a positive feedback effect, causing the ocean to heat up and contribute to increased sea ice melt.
Earlier this year, a national research team led by CU embarked on a two-year effort to better understand the impacts of environmental factors associated with the continuing decline of sea ice in the Arctic Ocean. The $3 million, NASA-funded project led by Research Professor James Maslanik of aerospace engineering sciences includes tools ranging from unmanned aircraft and satellites to ocean buoys in order to understand the characteristics and changes in Arctic sea ice, including the Beaufort Sea and Canada Basin that are experiencing record warming and decreased sea ice extent.
NSIDC is part of CU-Boulder’s Cooperative Institute for Research in Environmental Sciences — a joint institute of CU-Boulder and the National Oceanic and Atmospheric Administration headquartered on the CU campus — and is funded primarily by NASA. NSIDC’s sea ice data come from the Special Sensor Microwave Imager/Sounder sensor on the Defense Meteorological Satellite Program F17 satellite using methods developed at NASA’s Goddard Space Flight Center in Greenbelt, Md.
For more information and graphics visit CU-Boulder’s NSIDC website at http://nsidc.org/arcticseaicenews/2011/091511.html. For more information on CIRES visithttp://cires.colorado.edu/.