B43L:
The Depth Attenuation of Soil Organic Carbon Storage, Turnover, and Fate: Observations, Data Synthesis, and Modeling II


Session ID#: 8325

Session Description:
Soil is the biggest reservoir of carbon in terrestrial ecosystems, but significant uncertainty remains in the soil carbon-atmosphere interactions under climate change. Deep soil (>20cm) contains the majority (>80%) of the total soil organic carbon stock, however, there is little consensus on depth dependent biogeochemical controls, highlighting major gaps in our understanding of processes and mechanisms that control the soil carbon vertical distribution and its dynamics at large scales. This proposed session solicits experimental and modeling studies that address depth-related controls on the stock, fluxes, turnover time, and fate of soil organic carbon, such as organo-mineral associations and radiocarbon based increasing residence time with depth. Large scale and process-based mechanisms that are useful for vertically-resolved soil biogeochemical models in Earth System Models in the next round of IPCC assessment are particularly solicited.
Primary Convener:  Yujie He, University of California Irvine, Earth System Science, Irvine, CA, United States
Conveners:  Jennifer W W Harden, USGS, Menlo Park, United States and Evan S Kane, Michigan Technological University, School of Forest Resources and Environmental Sciences, Houghton, MI, United States
Chairs:  Yujie He, University of California Irvine, Earth System Science, Irvine, CA, United States and Jennifer W W Harden, USGS California Water Science Center Menlo Park, Menlo Park, CA, United States
OSPA Liaison:  Claire C Treat, University of Alaska Fairbanks, Fairbanks, AK, United States
Index Terms:

0414 Biogeochemical cycles, processes, and modeling [BIOGEOSCIENCES]
0428 Carbon cycling [BIOGEOSCIENCES]
0429 Climate dynamics [BIOGEOSCIENCES]
0486 Soils/pedology [BIOGEOSCIENCES]

Abstracts Submitted to this Session:

Comparing global soil models to soil carbon profile databases (Invited) (48097)
Charles D Koven, Lawrence Berkeley National Laboratory, Berkeley, CA, United States, Jennifer W W Harden, Stanford University, Earth System Science, Stanford, United States, Yujie He, University of California Irvine, Earth System Science, Irvine, CA, United States, David M Lawrence, NSF National Center for Atmospheric Research, Climate and Global Dynamics Laboratory, Boulder, United States, Lucas E Nave, University of Michigan Ann Arbor, Ann Arbor, MI, United States, Jonathan A O'Donnell, National Park Service Anchorage, Anchorage, AK, United States, Claire C Treat, USGS Geological Survey, Menlo Park, CA, United States, Benjamin N Sulman, Princeton University, Atmospheric and Oceanic Sciences, Princeton, NJ, United States and Evan S Kane, Michigan Technological University, School of Forest Resources and Environmental Sciences, Houghton, MI, United States
Vertical Soil Carbon Distributions in the Contiguous United States: Effects of Land Cover and History of Cultivation (Invited) (48098)
Benjamin N Sulman, Princeton University, Atmospheric and Oceanic Sciences, Princeton, NJ, United States, Lucas E Nave, University of Michigan Ann Arbor, Ann Arbor, MI, United States, Claire C Treat, University of Alaska Fairbanks, Fairbanks, AK, United States and Yujie He, University of California Irvine, Earth System Science, Irvine, CA, United States
Soil Warming and Rhizosphere Effects on Root Litter Decomposition at Two Depths in a Mediterranean Grassland Ecosystem (85213)
Cristina Castanha, Lawrence Berkeley National Laboratory, Climate and Ecosystem Sciences Division, Berkeley, United States, Biao Zhu, Peking University, Beijing, China, Caitlin Hicks Pries, Lawrence Berkeley National Laboratory, Berkeley, CA, United States and Margaret S Torn, Lawrence Berkeley National Laboratory, Climate and Ecosystem Sciences Division, Berkeley, CA, United States
Chemical characterization of iron-mediated soil organic matter stabilization in tropical subsoils (65442)
Elizabeth K Coward, University of Pennsylvania, Philadelphia, PA, United States, Alain F Plante, University of Pennsylvania, Earth & Environmental Science, Philadelphia, PA, United States and Aaron Thompson, University of Georgia, Crop and Soil Sciences, Athens, GA, United States
The Impact of Buried Horizons and Deep Soil Pedogenesis on Soil Carbon Content and Vertical Distribution (67626)
Jason Nathaniel James1, Christiana Dietzen1, Robert B Harrison1, Cole D. Gross1 and Alexandr Kirpach2, (1)University of Washington Seattle Campus, Seattle, WA, United States, (2)Tufts University, Medford, MA, United States
Recent advances in modeling depth distribution of soil carbon storage (Invited) (74388)
Umakant Mishra, Argonne National Laboratory, Environmental Science Division, Argonne, United States and Shijie Shu, University of Illinois at Urbana Champaign, Department of Atmospheric Sciences, Urbana, IL, United States
Grassland Degradation Alters Soil Carbon Turnover through Depth (82070)
Courtney Creamer, CSIRO, Agriculture, Glen Osmond, SA, Australia, Suzanne M. Prober, CSIRO Land and Water Flagship, Wembley, WA, Australia, Adrian Chappell, CSIRO, Land and Water Flagship, Canberra, ACT, Australia, Mark Farrell, Commonwealth Science and Industrial Research Organisation, Agriculture and Food, Glen Osmond, Australia and Jeff Baldock, CSIRO Land and Water, Glen Osmond, Australia
Cryoturbation, Peat Accumulation, And Gleying: Do These Processes Affect Soil Carbon Distribution Within Permafrost Profiles? (Invited) (48143)
Claire C Treat, University of Alaska Fairbanks, Fairbanks, AK, United States, Jennifer W W Harden, Stanford University, Earth System Science, Stanford, United States, Charles Koven, Lawrence Berkeley National Laboratory, Climate & Ecosystem Sciences Division, Berkeley, United States and Evan S Kane, Michigan Technological University, School of Forest Resources and Environmental Sciences, Houghton, MI, United States

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