The Effect of Elevated Carbon Dioxide (CO2) Concentrations and Vegetation Mortality on Mineral Weathering in SoilsEPA Grant Number: U915625
Title: The Effect of Elevated Carbon Dioxide (CO2) Concentrations and Vegetation Mortality on Mineral Weathering in Soils
Investigators: Stephens, Jennie C.
Institution: California Institute of Technology
EPA Project Officer: Michaud, Jayne
Project Period: September 1, 1999 through September 1, 2002
Project Amount: $99,167
RFA: STAR Graduate Fellowships (1999) RFA Text | Recipients Lists
Research Category: Academic Fellowships , Ecological Indicators/Assessment/Restoration , Fellowship - Earth Sciences
The primary objective of this research project is to determine the response of mineral weathering to both elevated soil carbon dioxide (CO2) concentrations and varying organic acid concentrations in soils from Mammoth Mountain, CA.
This research involves field sampling and analysis that compares the mineralogical and organic acid characteristics of soil samples from a high CO2 site on Mammoth Mountain to control soil samples collected from the same area that have not been exposed to elevated CO2 concentrations. This field work will be complemented with laboratory studies that assess weathering rates of soil minerals under controlled partial pressures of CO2 and varied organic acid concentrations.
Research of the Mammoth Mountain high CO2 site will provide data about the response of mineral weathering in soils to high CO2 concentrations, in conjunction with changes in organic acid concentrations caused by vegetation mortality.