Arctic late Paleocene-early Eocene paleoenvironments with special emphasis on the Paleocene-Eocene thermal maximum (Lomonosov Ridge, Integrated Ocean Drilling Program Expedition 302)
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 کاملRapid acidification of the ocean during the Paleocene-Eocene thermal maximum.
The Paleocene-Eocene thermal maximum (PETM) has been attributed to the rapid release of approximately 2000 x 10(9) metric tons of carbon in the form of methane. In theory, oxidation and ocean absorption of this carbon should have lowered deep-sea pH, thereby triggering a rapid (<10,000-year) shoaling of the calcite compensation depth (CCD), followed by gradual recovery. Here we present geochemi...
متن کاملA continental shelf perspective of ocean acidification and temperature evolution during the Paleocene-Eocene Thermal Maximum
A rapid and large injection of isotopically light carbon into the ocean-atmosphere reservoirs is signaled by a negative carbon isotope excursion (CIE) at the Paleocene-Eocene boundary ~56 m.y. ago. To better understand the extent of ocean warming and acidification associated with the carbon injection we generated elemental and isotopic records of surface and thermocline planktonic foraminifera ...
متن کاملA statistical interpretation of surface ocean temperature trends during the Paleocene-Eocene Thermal Maximum
often considered a geologic analog to the modern, rapid addition of carbon dioxide to the atmosphere. The ability to assess the sensitivity of many rate-dependent climate change impacts, based on the PETM analogy, hinges critically on the PETM warming rate. Current estimates of the PETM warming rate face considerable problems, for example, due to the nontrivial statistical challenges in account...
متن کاملEarly Eocene deep-sea benthic foraminiferal faunas: Recovery from the Paleocene Eocene Thermal Maximum extinction in a greenhouse world
The early Eocene greenhouse world was marked by multiple transient hyperthermal events. The most extreme was the Paleocene-Eocene Thermal Maximum (PETM, ~56 Ma), linked to the extinction of the globally recognised deep-sea benthic foraminiferal Velasco fauna, which led to the development of early Eocene assemblages. This turnover has been studied at high resolution, but faunal development into ...
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ژورنال
عنوان ژورنال: Paleoceanography
سال: 2008
ISSN: 0883-8305
DOI: 10.1029/2007pa001495