Geosciences and Environmental Change Science Center
August 19, 2016
Total belowground carbon flux in subalpine forests is related to leaf area index, soil nitrogen, and tree height
By Erin Berryman (GECSC), Michael Ryan, John Bradford, Todd Hawbaker (GECSC), and Richard Birdsey. Published in Ecosphere.
In forests, total belowground carbon flux is a large component of the carbon budget and represents a critical pathway for delivery of plant carbon to soil. This study looked for predictable patterns of total belowground carbon flux with measured variability in leaf area index, soil nitrogen, and tree height across three different subalpine forests in the Rocky Mountains. The results, which varied in support among the relationships studied, can aid with estimates of forest soil respiration and total belowground carbon flux across landscapes, using spatially explicit forest data such as national inventories or remotely sensed data products.
August 16, 2016
GECSC Geologist Natalie Kehrwald was invited by the National Academy of Sciences to present her work on melting glaciers to Hollywood writers and directors as part of the Science & Entertainment Exchange. The goal of this exchange is to incorporate accurate science into entertainment media and to show the wonder and adventure of science in narratives. Natalie discussed her work with Adventurers and Scientists for Conservation, a nonprofit organization that recruits members of the outdoor adventure community to help gather data.
August 12, 2016
Iron oxide minerals in dust-source sediments from the Bodélé Depression, Chad: Implications for radiative properties and Fe bioavailability of dust plumes from the Sahara
By Bruce Moskowitz, Rich Reynolds (GECSC), Harland Goldstein (GECSC), Thelma Berquó, Raymond Kokaly, and Charlie Bristow. Published in Aeolian Research.
Researchers, including Scientist Emeritus Rich Reynolds and Geologist Harland Goldstein from the GECSC, examined dust-source sediments from the Bodélé Depression, central Chad, for their iron minerals. The Bodélé Depression has been a significant global dust source during most of the Holocene and perhaps during past interglacial stages. Because of the remote location of the Bodélé Depression, dusts from it are free from human influence, either by land disturbance or contaminants. Therefore, the generation and composition of Bodélé dust today provide a window into the emission and composition of dust in the past and into the effects of this dust on paleoclimates. This study discovered nano-size iron minerals in dust generated from the most prolific dust-producing area in the world that can affect both atmospheric dynamics and ocean fertilization with consequent draw-down of atmospheric carbon dioxide.
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