Results 11 to 20 of about 52,149 (242)

Isotopes in pyrogenic carbon: A review [PDF]

Organic Geochemistry, 2012
Pyrogenic carbon (PC; also known as biochar, charcoal, black carbon and soot) derived from natural and anthropogenic burning plays a major, but poorly quantified, role in the global carbon cycle. Isotopes provide a fundamental fingerprint of the source of PC and a powerful tracer of interactions between PC and the environment.
Bird, M.I., Ascough, P.L.
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Applications of stable water and carbon isotopes in watershed research: Weathering, carbon cycling, and water balances [PDF]

, 2011
Research on rivers has traditionally involved concentration and flux measurements to better understand weathering, transport and cycling of materials from land to ocean.
Petelet-Giraud, Emmanuelle, Philippe Négrel, Heiko Freitag, Schulte, Peter, Van Geldern, Robert, Jean-Luc Probst, Peter Schulte, Ajaz Karim, Kevin Telmer, Johannes A.C. Barth, Probst, Jean-Luc, Freitag, Heiko, Karim, Ajaz, Robert van Geldern, Anne Probst, Telmer, Kevin, Négrel, Philippe, Barth, Johannes A.C., Probst, Anne, Ján Veizer, Veizer, Jan, Emmanuelle Petelet-Giraud, Barth, J. A. C., Barth, Johannes A. C.   +23 more
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Degradation changes stable carbon isotope depth profiles in palsa peatlands [PDF]

, 2014
Palsa peatlands are a significant carbon pool in the global carbon cycle and are projected to change by global warming due to accelerated permafrost thaw. Our aim was to use stable carbon isotopes as indicators of palsa degradation.
Leifeld, J., C. Alewell, J. P. Krüger, Alewell, C., Krueger, J. P., J. Leifeld   +5 more
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A STUDY OF QUANTUM ISOTOPIC SIEVING THORUGH CARBON NANOTUBES [PDF]

, 2013
The theory of molecular sieving has long been a subject of importance because of its widespread technological applications .Classical molecular sieving mainly de- pends on the size and shape of the guest molecules and the size of the host solid.
Dasgupta, Devagnik
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Stable and radiogenic isotopes as tracers for soil degradation [PDF]

, 2008
Soil erosion seriously threatens mountain slopes. Direct measurement of soil erosion in the field is difficult and needs long term recording. However, stable and radiogenic isotopes are potential tracers for soil erosion estimation and would enable a ...
Schaub, Monika
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EXOTIC STRUCTURE OF CARBON ISOTOPES [PDF]

Frontiers of Collective Motions, 2003
31 pages, 19 eps ...
Suzuki, Toshio, Sagawa, Hiroyuki, Hagino, Kouichi   +2 more
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A method to detect soil carbon degradation during soil erosion [PDF]

, 2009
Soil erosion has been discussed intensively but controversial both as a significant source or a significant sink of atmospheric carbon possibly explaining the gap in the global carbon budget.
Conen, F., C. Alewell, F. Conen, Schaub, M., Alewell, C., M. Schaub   +5 more
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Radiocarbon reservoir effects in human bone collagen from northern Iceland [PDF]

, 2012
Human bone collagen from a series of Icelandic human pagan graves was radiocarbon (14C) dated to aid understanding of early settlement (landnám) chronologies in northern Iceland. These individuals potentially consumed marine protein.
Dugmore, A.J., Cook, G.T., McGovern, T.H., Church, M.J., Ascough, P.L., Gestsdóttir, H., Friðriksson, A., Edwards, K.J., Dunbar, E.   +8 more
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Seasonally resolved growth of freshwater bivalves determined by oxygen and carbon isotope shell chemistry [PDF]

, 2010
By means of a monitoring experiment in two rivers in the Netherlands, we establish a relationship between seasonally resolved growth rates in unionid freshwater bivalves and their environment.
Dick Kroon, Kroon, Dick, Versteegh, E.A.A., Troelstra, S R, Ron J. G. Kaandorp, Vonhof, H B, Versteegh, Emma A. A., Simon R. Troelstra, Troelstra, Simon R., Kaandorp, R J G, Hubert B. Vonhof, Troelstra, S.R., Kroon, D., Vonhof, Hubert B., Vonhof, H.B., Kaandorp, Ron J. G., Kaandorp, R.J.G., Emma A. A. Versteegh, Kroon, D   +18 more
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Convergence of soil nitrogen isotopes across global climate gradients [PDF]

, 2015
Quantifying global patterns of terrestrial nitrogen (N) cycling is central to predicting future patterns of primary productivity, carbon sequestration, nutrient fluxes to aquatic systems, and climate forcing.
Brookshire, E. N. Jack, Brookshire, E N J, Mack, Michelle C., Stevenson, Bryan A, Cramer, Michael Denis, Hobbie, Erik A, Richter, Andreas, Viani, Ricardo A.G., Oliveira, Rafael S., Tumer, Benjamin L., Oliveira, Rafael S, McLauchlan, Kendra K, Peri, Pablo L, Mack, Michelle C, Zeller, Bernd, Kahmen, Ansgar, Brookshire, E. N. J., Hasselquist, Niles J., Nardoto, G. B., Craine, Joseph M., Viani, Ricardo A G, Wan?k, Wolfgang, Stevenson, Bryan A., Nardoto, Gabriela B, Nardoto, Gabriela B., Quesada, Carlos Alberto, Brookshire, E.N.J., Turner, Benjamin L., Turner, Benjamin L, Craine, Joseph M, Viani, Ricardo A. G., Cramer, Michael D, Peri, Pablo Luis, Elmore, Andrew J., McLauchlan, Kendra K., Augusto, Laurent, Marin-Spiotta, Erika, Zeller, Bernhard, Kranabetter, J. Marty, Mayor, Jordan R., Hasselquist, Niles J, Richter, Andreas A., Quesada, Carlos A, Kranabetter, John Marty, Hobbie, Erik A., Brookshire, E. N.Jack, Michelsen, Anders, Perakis, Steven S, Wanek, Wolfgang, Craine, Joseph Mitchell, Schipper, L. A., Peri, Pablo L., Elmore, Andrew J, Perakis, Steven S., Kranabetter, J Marty, Schipper, Louis A., Baisden, W. Troy, Koba, Keisuke, Elmore, Andrew James, Viani, Ricardo Augusto Gorne, Baisden, W Troy, Wang, Lixin, Schipper, Louis A, Mayor, Jordan R, Cramer, Michael D., Quesada, Carlos A.   +65 more
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