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Zoology and wildlife conservation

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Abstracts » Zoology and wildlife conservation

Changes in carbon dioxide during an oceanic anoxic event linked to intrusion into Gondwana coals

Article Abstract:

Two leading hypotheses are tested for a negative carbon isotopic excursion marking the initiation of the Toarcian oceanic anoxic events (OAE) using a high-resolution atmospheric carbon dioxide record obtained from fossil leaf stomatal frequency. The marine sedimentary record exhibits evidence for episodes of enhanced organic burial known as OAE.

Author: Hesselbo, Stephen P., McElwain, Jennifer C., Wade-Murphy, Jessica
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2005
United States, Marine sediments, Gondwana

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Export of dissolved organic carbon from peatlands under elevated carbon dioxide levels

Article Abstract:

A discussion on the three potential causal mechanisms of rapidly rising dissolved organic carbon (DOC) concentrations in rivers draining peatlands is presented. Three main factors are put forward as potential causal mechanisms but it appears that two alternatives-warming and increased river discharge cannot offer satisfactory explanations.

Author: Freeman, C., Fenner, N., Ostle, N. J., Kang, H., Dowrick, D.J., Reynolds, B., Lock, M.A., Sleep, D., Hughes, S., Hudson, J.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2004
Analysis, Rivers, Organic compound synthesis

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High levels of atmospheric carbon dioxide necessary for the termination of global glaciation

Article Abstract:

Simulations with a general circulation model, using elevated carbon dioxide levels to estimate the deglaciations threshold is presented. It is found that the system remains for short of deglaciation even at atmospheric carbon dioxide concentrations of 550 times the present levels.

Author: Pierrehumbert, Raymond T.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2004
Simulation methods, Simulation, Glaciation

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Subjects list: Research, Environmental aspects, Carbon dioxide, Composition
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