Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

NCAR Aircraft, Ground Instruments to Track Carbon Dioxide Uptake along Colorado’s Drought-Plagued Front Range

27.04.2004


The National Center for Atmospheric Research will fly a C-130 research aircraft over Colorado’s Front Range this May and July to measure how much carbon dioxide mountain forests remove from the air as spring turns into summer. NCAR scientists and their university colleagues are developing new methods for assessing carbon uptake over complex terrain on regional scales. Accurate assessments could help show to what extent carbon dioxide storage in Western mountain forests-- a potentially important "sink" for the greenhouse gas--may be slowing down as the ongoing drought affects tree growth.



International pressure is mounting to limit carbon emissions because of their role in global climate change. Better understanding of natural processes involved in forest-air carbon exchange may lead to more accurate monitoring methods and new ways to enhance carbon uptake. High carbon-emitting nations and industries are interested in devising strategies for meeting quotas and trading carbon credits.

ACME (short for the Airborne Carbon in the Mountains Experiment) gives scientists an opportunity to combine airborne data with ground-based measurements for the first time to paint a more accurate picture of carbon exchanges in rolling hills and mountain ranges. Results from the field program will also be used in testing computer models of forest ecosystem function. The models will help scientists understand the response of forests to drought, fire, insects, and climate change.


Local researchers are especially interested in a side trip to assess forest-air exchange over the 150,000-acre Hayman fire burn area.

"Wildfires play a big role in controlling vegetation and carbon exchange in the Rockies," says NCAR scientist Dave Schimel, "but most burn areas are too small to assess from an aircraft. For the first time we have a chance to get airborne measurements of carbon directly over a large, disturbed area."

Forest losses during the 2002 wildfire season in Colorado reversed years of carbon uptake. The amount of carbon dioxide released from trees during the fires equaled an entire year’s emissions from statewide transportation activities.

As the research plane samples air aloft, a dense network of instruments will gather data over a half square mile on Niwot Ridge near Nederland. Perched atop three steel towers provided by NCAR, each between 100 and 200 feet tall, carbon dioxide sensors and sonic anemometers will measure changes in carbon levels and winds high above the tree tops.

"Today we usually look for carbon in all the wrong places,” says Schimel, "focusing on where it’s easy to measure rather than where fluxes are largest.” Most current studies are in flat areas, but most western forests are in the mountains, he explains. Schimel and colleagues have estimated that 25-50% of U.S. carbon uptake occurs in mountainous terrain.

In the northern midlatitudes, significant carbon uptake occurs in forests, which are typically left to grow undisturbed in mountainous regions. Ground-based sensors work well in flat land: there are 200 such sites around the world. But in mountain ranges special conditions, such as turbulent airflow, snow pack, vegetation patterns, and contrasts
in sunshine and shade, complicate data gathering.

The National Science Foundation, NCAR’s primary sponsor and owner of the C-130 aircraft, is funding the project. The universities of Colorado, Florida, and Utah, Colorado State University, and Scripps Institution of Oceanography are participating, along with NCAR.

C-130 Flight Schedule and Paths

Heading out at sunrise from Jefferson County Airport, the C-130 will travel along a 30-mile arm from Winter Park east to Longmont and around a 71-mile oval loop from Idaho Springs north to Allenspark (see map below), carrying a belly full of specialized instruments. The aircraft will retrace the pattern again between 2:00 and 4:00 p.m. the same day, flying as low as 1,000 feet above the ground in some places and rising to 16,500 feet in others. The pilots expect to fly four or five days in May and the same number in July. They will also head south to the Hayman burn area southwest of Denver once in May and once in July.

Anatta | NCAR
Further information:
http://www.ucar.edu/communications/newsreleases/2004/acme.html

More articles from Earth Sciences:

nachricht Heavy nitrogen molecules reveal planetary-scale tug-of-war
20.11.2017 | Rice University

nachricht Colorado River's connection with the ocean was a punctuated affair
16.11.2017 | University of Oregon

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: A “cosmic snake” reveals the structure of remote galaxies

The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.

Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...

Im Focus: Visual intelligence is not the same as IQ

Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.

That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...

Im Focus: Novel Nano-CT device creates high-resolution 3D-X-rays of tiny velvet worm legs

Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.

During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....

Im Focus: Researchers Develop Data Bus for Quantum Computer

The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.

Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...

Im Focus: Wrinkles give heat a jolt in pillared graphene

Rice University researchers test 3-D carbon nanostructures' thermal transport abilities

Pillared graphene would transfer heat better if the theoretical material had a few asymmetric junctions that caused wrinkles, according to Rice University...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Ecology Across Borders: International conference brings together 1,500 ecologists

15.11.2017 | Event News

Road into laboratory: Users discuss biaxial fatigue-testing for car and truck wheel

15.11.2017 | Event News

#Berlin5GWeek: The right network for Industry 4.0

30.10.2017 | Event News

 
Latest News

Water world

20.11.2017 | Life Sciences

Less is more to produce top-notch 2D materials

20.11.2017 | Materials Sciences

Carefully crafted light pulses control neuron activity

20.11.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>