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Depletion of 13C in seawater ΣC02 on modern carbonate platforms: Significance for the carbon isotopic record of carbonates
Seawater ΣCO2 from modern carbonate platforms (Bahama Banks and Florida) is depleted in 13C by as much as 4‰ relative to open-ocean water. Depletion in 13C is caused by isotopically light CO2 inputExpand
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Increasing Great Lake-Effect Snowfall during the Twentieth Century: A Regional Response to Global Warming?.
Abstract The influence of the Laurentian Great Lakes on the climate of surrounding regions is significant, especially in leeward settings where lake-effect snowfall occurs. Heavy lake-effect snowExpand
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Local and global perspectives on carbon and nitrogen cycling during the Hirnantian glaciation
Abstract The impact of climate and ocean circulation changes on marine carbon and nitrogen cycling was investigated for a period covering the Late Ordovician Hirnantian glaciation. Three sectionsExpand
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Cooler winters as a possible cause of mass extinctions at the Eocene/Oligocene boundary
The Eocene/Oligocene boundary, at about 33.7 Myr ago, marks one of the largest extinctions of marine invertebrates in the Cenozoic period. For example, turnover of mollusc species in the US GulfExpand
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Oxygen isotope values of precipitation and surface waters in northern Central America (Belize and Guatemala) are dominated by temperature and amount effects
Abstract An understanding of the climatic controls on precipitation δ 18 O is required to interpret isotopic records of paleoclimate and paleoaltimetry. However, variations in precipitation δ 18 O inExpand
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Dissolution and recrystallization in modern shelf carbonates: evidence from pore water and solid phase chemistry
We present an overview of geochemical data from pore waters and solid phases that clarify earliest diagenetic processes affecting modern, shallow marine carbonate sediments. Acids produced by organicExpand
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Fractionation between inorganic and organic carbon during the Lomagundi (2.22–2.1 Ga) carbon isotope excursion
ARTICLE I NFO The Lomagundi (2.22-2.1 Ga) positive carbon isotope excursion in shallow-marine sedimentary carbonates has been associated with the rise in atmospheric oxygen, but subsequent studiesExpand
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Early life history of Lake Michigan alewives (Alosa pseudoharengus) inferred from intra-otolith stable isotope ratios
We apply a robotic micromilling technique to the sampling of young-of-the-year (YOY) and 1+ otoliths from alewives (Alosa pseudoharengus) captured in different habitat types of Lake Michigan duringExpand
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Tropical response to the 8200 yr B.P. cold event? Speleothem isotopes indicate a weakened early Holocene monsoon in Costa Rica
A δ 1 8 O monsoon rainfall proxy record from a U-Th-dated Costa Rican stalagmite (8840-4920 yr B.P.) documents an early Holocene dry period correlative with the high-latitude 8200 yr B.P. cold event.Expand
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