Global CO2-consumption by chemical weathering: What is the contribution of highly active weathering regions?
نویسندگان
چکیده
منابع مشابه
Biota and Chemical Weathering
The Earth has an average surface temperature of about 15°C, which is, in terms of planetary conditions suitable for life, the equivalent of winning the cosmic lottery. Yet, without an atmosphere filled with biological waste gases capable of retaining heat (O2, N2O, CH4, CO2), the average temperature of the planet would be about −18°C (Smil 2002), making the present diversity and abundance of li...
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Temperate forests provide favorable conditions for carbonate bedrock weathering as the soil CO2 partial pressure is high and soil water is regularly available. As a result of weathering, abiotic CO2 can be released and contribute to the soil CO2 efflux. We used the distinct isotopic signature of the abiotic CO2 to estimate its contribution to the total soil CO2 efflux. Soil cores were sampled f...
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Introduction: Spectroscopic observations offer the best means to evaluate chemical weathering on Mars at regional and global scales. Near-infrared (NIR) spectral data from OMEGA and CRISM have revealed hydrated minerals that indicate aqueous alteration, including different clay minerals [1-3], sulfates [1,4], silica [5], and carbonates [6], which are regionally localized across the Martian high...
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It has been proposed that increased rates of chemical weathering and the related drawdown of atmospheric CO on the 2 Ž . continents may have at least partly contributed to the low CO concentrations during the last glacial maximum LGM . 2 Variations in continental erosion could thus be one of the driving forces for the glacialrinterglacial climate cycles during Quaternary times. To test such an ...
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ژورنال
عنوان ژورنال: Global and Planetary Change
سال: 2009
ISSN: 0921-8181
DOI: 10.1016/j.gloplacha.2009.07.007