Tree-ring carbon isotope data and drought maps
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An explanation of 13C/12C variations in tree rings.
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Global land cover mapping from MODIS: algorithms and early results.
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Dupouey, J.-L., Leavitt, S., Choisnel, E. and Jourdain, S., 1993.
Modelling carbon isotope fractionation in tree rings based on effective evapotranspiration and soil water status.
Plant, Cell and Environ. 16: 939-947.
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Seasonal 13C/12C changes in tree rings: species and site coherence, and a possible drought influence.
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The global biosphere as net CO2 source or sink: evidence from carbon isotopes in tree rings.
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Leavitt, S.W. and Long, A., 1986.
Trends of 13C/12C ratios in pinyon pine tree rings of the American southwest and the global carbon cycle.
Radiocarbon 28: 376-382.
Leavitt, S.W. and Long, A. 1988.
Stable carbon isotope chronologies from trees in the southwestern United States.
Global Biogeochemical Cycles 2: 189-198.
Leavitt, S.W. and Long, A. 1989a.
Drought indicated in carbon-13/carbon-12 ratios of southwestern tree rings.
Water Resources Bulletin 25: 341-347.
Leavitt, S.W. and Long, A., 1989b.
The atmospheric d13C record as derived from 56 pinyon trees at 14 sites in the southwestern U.S.
Radiocarbon 31: 469-474.
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Spatial expression of ENSO, drought and summer monsoon in seasonal d13C of ponderosa pine tree rings in southern Arizona and New Mexico.
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Estimating Historical Changes in Global Land Cover: Croplands from 1700 to 1992.
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13C/12C ratios in tree are sensitive to relative humidity.
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The climate-carbon isotope relationship in tree rings and the significance of site conditions.
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Global map of irrigated areas version 4.0,
Johann Wolfgang Goethe University, Frankfurt am Main, Germany
Food and Agriculture Organization of the United Nations, Rome, Italy.
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