@article{39ef47be89ec4ef0b4f80607a5d4f351,
title = "Direct measurement of the combined effects of lichen, rainfall, and temperature onsilicate weathering",
abstract = "A key uncertainty in models of the global carbonate-silicate cycle and long-term climate is the way that silicates weather under different climatologic conditions, and in the presence or absence of organic activity. Digital imaging of basalts in Hawaii resolves the coupling between temperature, rainfall, and weathering in the presence and absence of lichens. Activation energies for abiotic dissolution of plagioclase (23.1 ± 2.5 kcal/mol) and olivine (21.3 ± 2.7 kcal/mol) are similar to those measured in the laboratory, and are roughly double those measured from samples taken underneath lichen. Abiotic weathering rates appear to be proportional to rainfall. Dissolution of plagioclase and olivine underneath lichen is far more sensitive to rainfall.",
author = "Brady, {Patrick V.} and Ronald Dorn and Brazel, {Anthony J.} and James Clark and Moore, {Richard B.} and Tiffany Glidewell",
note = "Funding Information: This work was supported by the United States Department of Energy under Contract DE-AC04-94AL85000. Funding Information: We greatly appreciate helpful reviews from Heinrich D. Holland, Abraham Lerman, an anonymous reviewer, and the editor, K. Vala Ragnarsdottir. We appreciate funding from the Petroleum Research Fund of the American Chemical Society and DOE/BES-Geosciences. We particularly acknowledge an early, thorough review and tutorial on weathering in the Precambrian by T. A. Jackson, and helpful discussions with Eric Oelkers, Susan Stipp, and Steve Gordon. The senior author owes a particular debt of gratitude to Prof. Stumm who encouraged him on this track while at EAWAG in 1990.",
year = "1999",
month = oct,
doi = "10.1016/S0016-7037(99)00251-3",
language = "English (US)",
volume = "63",
pages = "3293--3300",
journal = "Geochmica et Cosmochimica Acta",
issn = "0016-7037",
publisher = "Elsevier Limited",
number = "19-20",
}