Publications by authors named "Kendrick Taylor"
Glacial-state greenhouse gas concentrations and Southern Hemisphere climate conditions persisted until ∼17.7 ka, when a nearly synchronous acceleration in deglaciation was recorded in paleoclimate proxies in large parts of the Southern Hemisphere, with many changes ascribed to a sudden poleward shift in the Southern Hemisphere westerlies and subsequent climate impacts. We used high-resolution chemical measurements in the West Antarctic Ice Sheet Divide, Byrd, and other ice cores to document a unique, ∼192-y series of halogen-rich volcanic eruptions exactly at the start of accelerated deglaciation, with tephra identifying the nearby Mount Takahe volcano as the source.
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- - The text discusses the relationship between atmospheric carbon dioxide (CO2) levels and global climate, focusing on the rise of CO2 during the last glacial termination roughly 23,000 to 9,000 years ago, emphasizing the uncertain processes behind this increase.
- - New data from a West Antarctic ice core reveals that while CO2 changes generally align with Antarctic temperature shifts, there are abrupt CO2 increases tied to Northern Hemisphere climate changes, notably occurring in three rapid steps of 10 to 15 parts per million each.
- - The findings suggest that while Southern Ocean dynamics are important for understanding historical CO2 increases, there are also shorter-term fluctuations in CO2 linked to Atlantic ocean circulation that current Earth system models may not adequately account
Photosynthesis and respiration occur widely on Earth's surface, and the 18O/16O ratio of the oxygen produced and consumed varies with climatic conditions. As a consequence, the history of climate is reflected in the deviation of the 18O/16O of air (delta18Oatm) from seawater delta18O (known as the Dole effect). We report variations in delta18Oatm over the past 60,000 years related to Heinrich and Dansgaard-Oeschger events, two modes of abrupt climate change observed during the last ice age.
View Article and Find Full Text PDFImpurities trapped in ice sheets and glaciers have the potential to provide detailed, high temporal resolution proxy information on paleo-environments, atmospheric circulation, and environmental pollution through the use of chemical, isotopic, and elemental tracers. We present a novel approach to ice-core chemical analyses in which an ice-core melter is coupled directly with both an inductively coupled plasma mass spectrometer and a traditional continuous flow analysis system. We demonstrate this new approach using replicated measurements of ice-core samples from Summit, Greenland.
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