Seasonal dynamics of CO2 profiles across a soil chronosequence,Santa Cruz,California |
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| Authors: | Marjorie Schulz David Stonestrom Guntram Von Kiparski Corey Lawrence Carrie Masiello Art White John Fitzpatrick |
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| Institution: | 1. US Geological Survey, 345 Middlefield Rd., Menlo Park, CA 94025, USA;2. Dept. of Environmental Sciences, University of California, Room 2327 Geology, Riverside, CA 92521, USA;3. Department of Earth Science MS 126, Rice University, 6100 Main St., Houston, TX 77005, USA |
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| Abstract: | Concentrations of CO2 in soil atmosphere and CO2 efflux were measured across a marine terrace soil chronosequence near Santa Cruz, California. Soil development, specifically the formation of an argillic horizon, has created a two-tier soil gas profile in the older terrace soils. The soil above the argillic horizon has seasonal variations in soil CO2 associated with plant respiration. The older soils with dense argillic horizons maintain a year round ～1%CO2 below the argillic horizon. The CO2efflux during the growing season is higher on the older terraces. |
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