The Paleocene-Eocene Thermal Maximum: How much carbon is enough?
نویسندگان
چکیده
منابع مشابه
Sharply increased insect herbivory during the Paleocene-Eocene Thermal Maximum.
The Paleocene-Eocene Thermal Maximum (PETM, 55.8 Ma), an abrupt global warming event linked to a transient increase in pCO2, was comparable in rate and magnitude to modern anthropogenic climate change. Here we use plant fossils from the Bighorn Basin of Wyoming to document the combined effects of temperature and pCO2 on insect herbivory. We examined 5,062 fossil leaves from five sites positione...
متن کاملEvidence for a rapid release of carbon at the Paleocene-Eocene thermal maximum.
The Paleocene/Eocene thermal maximum (PETM) and associated carbon isotope excursion (CIE) are often touted as the best geologic analog for the current anthropogenic rise in pCO2. However, a causal mechanism for the PETM CIE remains unidentified because of large uncertainties in the duration of the CIE's onset. Here, we report on a sequence of rhythmic sedimentary couplets comprising the Paleoce...
متن کاملOnset of carbon isotope excursion at the Paleocene-Eocene thermal maximum took millennia, not 13 years.
The Paleocene-Eocene thermal maximum (PETM) may represent the best paleo-analog for rapid and massive carbon release to the ocean and atmosphere. Thus, constraining the carbon release rate at its onset is critical. Wright and Schaller (1) use records from apparently rhythmically layered shelf sediments to argue that the layering is annual and that the onset of the carbon isotope excursion (CIE,...
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often the subject of fierce debate. Cost increases are determined by dynamic relationships between many factors, including acts of nature, interest rates, oil prices, global commodity markets, wars, wage rates, and the overall health of the economy, as well as supply and demand for the required goods or services. How much escalation is enough? Are the recent price increases temporary aberration...
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Recent papers published in Nature by Guardavaccaro et al. and Westbrook et al. describe a nexus of two masters of negative regulation of protein levels. Both of these studies establish that the transcriptional repressor REST/NRSF is regulated by the highly versatile ubiquitin protein ligase (E3) SCF(beta-TrCP), adding a new dimension to the relationship between the ubiquitin-proteasome system a...
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ژورنال
عنوان ژورنال: Paleoceanography
سال: 2014
ISSN: 0883-8305
DOI: 10.1002/2014pa002650