Geochemistry of oceanic anoxic events

HC Jenkyns - Geochemistry, Geophysics, Geosystems, 2010 - Wiley Online Library
Oceanic anoxic events (OAEs) record profound changes in the climatic and
paleoceanographic state of the planet and represent major disturbances in the global …

Stratigraphy of the Anthropocene

J Zalasiewicz, M Williams, R Fortey… - … of the Royal …, 2011 - royalsocietypublishing.org
The Anthropocene, an informal term used to signal the impact of collective human activity on
biological, physical and chemical processes on the Earth system, is assessed using …

When did the Anthropocene begin? A mid-twentieth century boundary level is stratigraphically optimal

J Zalasiewicz, CN Waters, M Williams… - Quaternary …, 2015 - Elsevier
We evaluate the boundary of the Anthropocene geological time interval as an epoch, since it
is useful to have a consistent temporal definition for this increasingly used unit, whether the …

[PDF][PDF] Are we now living in the Anthropocene?

J Zalasiewicz, M Williams, A Smith, TL Barry, AL Coe… - Gsa Today, 2008 - academia.edu
The term Anthropocene, proposed and increasingly employed to denote the current interval
of anthropogenic global environmental change, may be discussed on stratigraphic grounds …

The evolution of pCO2, ice volume and climate during the middle Miocene

GL Foster, CH Lear, JWB Rae - Earth and Planetary Science Letters, 2012 - Elsevier
The middle Miocene Climatic Optimum (17–15Ma; MCO) is a period of global warmth and
relatively high CO2 and is thought to be associated with a significant retreat of the Antarctic …

[PDF][PDF] The “Anthropocene” epoch: Scientific decision or political statement

SC Finney, LE Edwards - Gsa Today, 2016 - exploreiowageology.org
The proposal for the “Anthropocene” epoch as a formal unit of the geologic time scale has
received extensive attention in scientific and public media. However, most articles on the …

Can an Anthropocene Series be defined and recognized?

J Zalasiewicz, M Williams… - Geological Society, London …, 2014 - lyellcollection.org
We consider the Anthropocene as a physical, chronostratigraphic unit across terrestrial and
marine sedimentary facies, from both a present and a far future perspective, provisionally …

A record of Neogene seawater δ11B reconstructed from paired δ11B analyses on benthic and planktic foraminifera

R Greenop, MP Hain, SM Sosdian, KIC Oliver… - Climate of the …, 2017 - cp.copernicus.org
The boron isotope composition (δ 11 B) of foraminiferal calcite reflects the pH and the boron
isotope composition of the seawater the foraminifer grew in. For pH reconstructions, the δ 11 …

Is there an isotopic signature of the Anthropocene?

JR Dean, MJ Leng, AW Mackay - The Anthropocene Review, 2014 - journals.sagepub.com
We consider whether the Anthropocene is recorded in the isotope geochemistry of the
atmosphere, sediments, plants and ice cores, and the time frame during which any changes …

[HTML][HTML] No detectable influence of the carbonate ion effect on changes in stable carbon isotope ratios (C) of shallow dwelling planktic foraminifera over the past …

P Köhler, S Mulitza - Climate of the Past, 2024 - cp.copernicus.org
Laboratory experiments showed that the isotopic fractionation of δ 13 C and of δ 18 O during
calcite formation of planktic foraminifera are species-specific functions of ambient CO 3 2 …