Julia Marks Peterson
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View article: Global ocean heat content over the past 3 million years
Global ocean heat content over the past 3 million years Open
The Pleistocene Epoch is characterized by global cooling and an increase in the intensity and duration of glacial cycles. Regional surface and subsurface ocean temperature records follow distinct trends over this interval, suggesting dynam…
View article: Ice cores from the Allan Hills, Antarctica show relatively stable atmospheric CO2 and CH4 levels over the last 3 million years
Ice cores from the Allan Hills, Antarctica show relatively stable atmospheric CO2 and CH4 levels over the last 3 million years Open
The role greenhouse gases play in the evolution of Earth's climate over the last 3 million years is uncertain beyond the continuous ice core record (800,000 years). Here, we present new snapshots of carbon dioxide (CO2) and meth…
View article: Three-Dimensional Multitrack Electrical Conductivity Method for Interpretation of Complex Ice Core Stratigraphy
Three-Dimensional Multitrack Electrical Conductivity Method for Interpretation of Complex Ice Core Stratigraphy Open
Recent ice cores from the Allan Hills, a blue ice area in Antarctica, are nearly 3 million years old. These cores extend ice core chronologies, enabling new insight into key climate periods such as the Mid-Pleistocene Transition. The inter…
View article: Re-assessment of methane cycle dynamics from the preindustrial to present-day 
Re-assessment of methane cycle dynamics from the preindustrial to present-day  Open
Ice core reconstructions of atmospheric methane (CH4) and its stable carbon isotope ratio (δ13CH4) provide important constraints for understanding the links between human activity, methane and climate. However, uncertainties in existi…
View article: Late Pliocene and Early Pleistocene CO2 and CH4 from ice cores from the Allan Hills, Antarctica
Late Pliocene and Early Pleistocene CO2 and CH4 from ice cores from the Allan Hills, Antarctica Open
Currently, chronologically discontinuous ice cores from the Allan Hills Blue Ice Area (BIA), Antarctica, are our only direct insight into the atmospheric composition of periods beyond the continuous ice core record (800 ka BP). An accurate…