Dr Kevin Robert Gurney, assistant professor in the Earth & Atmospheric Science/Agronomy at Purdue University and Associate Director of the Purdue Climate Change Research Center, presented these results at the “Is a Warmer Arctic Adding Carbon Dioxide to the Atmosphere” session of American Association for the Advancement of Science meeting in San Francisco, CA on December 17th.
The research examined the variations in carbon flux from boreal ecosystems, uncovered by the “inverse” method, in relation to measurements of temperature, precipitation and climate indices. The study shows that Boreal N America removes carbon from the Earth’s atmosphere during years in which the region experiences warm Spring temperatures and rainfall. Boreal Asia, however, exhibits an opposing response - years with above normal Fall temperatures and rainfall result in net carbon emissions. “A warming Canada may mean Canadian forests will act as a sink to atmospheric CO2,” said Gurney, “while boreal Asia could lose ecosystem carbon to the atmosphere as the regions warms.”
The results are directly applicable to climate change studies which attempt to link the land and ocean carbon cycles to future warming. Some studies have shown an additional temperature increase (above that derived from industrial greenhouse gases) due primarily to carbon emissions from warmed global soils. The research presented by Gurney suggests that this may occur in Asia but not in North America. “This should help us perform better projections
The results for Boreal North America are further linked to El Nino events. “The greater uptake in Springtime Boreal North American in warm, wet years appears to be related to the El Nino/Southern Oscillation,” said Gurney. “The teleconnection is remarkable, you can see the tropical pacific temperature patterns associated with El Nino travel north and impact boreal North America, inducing greater uptake”.
Temperature and Precipitation are not the only drivers of ecosystem carbon exchange, noted Gurney, but approximately one-half of the variations in Spring and Fall carbon exchange were explained by variations in Temperature and Precipitation. “Human activity such as harvest or fire can also have a large impact on these systems and we are turning to exploring those next”.
Kevin Gurney | EurekAlert!
Waste in the water – New purification techniques for healthier aquatic ecosystems
24.07.2018 | Eberhard Karls Universität Tübingen
Plenty of habitat for bears in Europe
24.07.2018 | Deutsches Zentrum für integrative Biodiversitätsforschung (iDiv) Halle-Jena-Leipzig
New design tool automatically creates nanostructure 3D-print templates for user-given colors
Scientists present work at prestigious SIGGRAPH conference
Most of the objects we see are colored by pigments, but using pigments has disadvantages: such colors can fade, industrial pigments are often toxic, and...
Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...
Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.
When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...
Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.
Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....
Proteins must be folded correctly to fulfill their molecular functions in cells. Molecular assistants called chaperones help proteins exploit their inbuilt folding potential and reach the correct three-dimensional structure. Researchers at the Max Planck Institute of Biochemistry (MPIB) have demonstrated that actin, the most abundant protein in higher developed cells, does not have the inbuilt potential to fold and instead requires special assistance to fold into its active state. The chaperone TRiC uses a previously undescribed mechanism to perform actin folding. The study was recently published in the journal Cell.
Actin is the most abundant protein in highly developed cells and has diverse functions in processes like cell stabilization, cell division and muscle...
17.08.2018 | Event News
08.08.2018 | Event News
27.07.2018 | Event News
17.08.2018 | Physics and Astronomy
17.08.2018 | Information Technology
17.08.2018 | Life Sciences