Geological Society of America

8:05 AM

Estimates of Atmospheric CO2 For the Past 420 Million Years and Its Relationship to Temperature

Dana L. Royer, Wesleyan Univ, Middletown, CT and Robert A. Berner, Yale Univ, New Haven, CT and Jeffrey Park, Yale Univ, New Haven, CT

147768 (JOINT SESSIONS)

8:25 AM

Forest Soil Respiration: What Don't We Know?

Jim Raich, Iowa State University, Ames, IA

142419 (JOINT SESSIONS)

8:45 AM

Sniffing the Air In Ancient Soils: Pedogenic Goethite and Soil Carbon Dioxide

Crayton J. Yapp, Southern Methodist University, Dallas, TX

146278 (JOINT SESSIONS)

9:05 AM

Soil Respiration: Influence of Agricultural Management

Philippe Rochette, Agriculture and Agri-Food Canada, Québec City, QC

142706 (JOINT SESSIONS)

9:25 AM

Carbon Isotope Geochemistry of Co-Existing Paleosol Calcite and Organic Matter: Indicator of Soil CO2 Concentration, Actual Evapotranspiration, and the Driest Landscapes on Earth

Neil Tabor, Dallas, TX and Isabel Montanez, University of California, Davis, Davis, CA and Christopher J. Poulsen, University of Michigan, Ann Arbor, MI

146394 (JOINT SESSIONS)

9:45 AM

Methodological Considerations of High Frequency Automated Soil Respiration Measurements

Eric Davidson, California Institute of Technology, Pasadena, CA and Kathleen E. Savage, The Woods Hole Research Center, Falmouth, MA and Andrew D. Richardson, University of New Hampshire, Durham, NH

147325 (JOINT SESSIONS)

10:05 AM

Possible Implications of Variations of Carbon Dioxide Concentration and 13C/12C In a Mid-Cretaceous Paleosol as Estimated from the Fe(CO3)OH Component of Goethite

Weimin Feng, Southern Methodist Univ, Dallas, TX and Crayton J. Yapp, Southern Methodist University, Dallas, TX

148738 (JOINT SESSIONS)

10:20 AM

Comparison of Soil CO2 Fluxes by Eddy-Covariance and Chamber Methods in Fallow Periods of a Corn-Soybean Rotation

Guillermo Hernandez-Ramirez, USDA-ARS, National Soil Tilth Laboratory, Ames, IA and Timothy B. Parkin, USDA-ARS, National Soil Tilth Laboratory, Ames, IA and Jerry Hatfield, USDA-ARS, National Soil Tilth Laboratory, Ames, IA and Thomas J. Sauer, USDA-ARS, National Soil Tilth Laboratory, Ames, IA and John Prueger, USDA-ARS, National Soil Tilth Laboratory, Ames, IA

148105 (JOINT SESSIONS)

10:35 AM

Exploring the Sensitivity of Paleo-PCO2 Models Based on δ13C of Pedogenic Gibbsite to Changing Soil Variables with Depth Using Numerical Methods

Jason C. Austin, University of Georgia, Hoschton, GA and Paul Schroeder, University of Georgia, Athens, GA and John Dowd, University of Georgia, Athens, GA

149128 (JOINT SESSIONS)

10:50 AM

Impact of Urbanization on CO2 Fluxes and Sources from Houston-Area Watersheds

Fanwei Zeng, Rice University, Houston, TX and Carrie A. Masiello, Rice University, Houston, TX

150207 (JOINT SESSIONS)

11:05 AM

Estimating Soil C, N, and P Mineralization from Short-Term CO2 Respiration

Richard L. Haney, USDA-ARS, Temple, TX

150284 (JOINT SESSIONS)

11:20 AM

Influences of Stand Density on Soil Respiration for Pinus Densiflora

Y. Son, Korea University, Seoul, N/A and J.H. Hwang, Korea Forest Research Institute, Pochon, N/A and N.J. Noh, Korea University, Seoul, N/A and K.W. Seo, Korea University, Seoul, N/A and S.J. Heo, Korea University, Seoul, N/A and S.K. Lee, Korea University, Seoul, N/A and D.H. Kim, Korea University, Seoul, N/A and W.K. Lee, Korea University, Seoul, N/A and C. Kim, Jinju National University, Jinju, N/A and S.W. Bae, Korea Forest Research Institute, Pochon, N/A

140665 (JOINT SESSIONS)

11:35 AM

Variation In Soil CO2 Flux In a Tropical Dryland Agroecosystem: Impact of Addition of Various Resource Quality Inputs

Nandita Ghoshal, Banaras Hindu University, Varanasi, N/A and Sonu Singh, Banaras Hindu University, Varanasi, N/A and K.P. Singh, N/A

147046 (JOINT SESSIONS)

63 Soil Respiration: From Human to Geologic Time Scales

Presentations