ORCID Profile
0000-0002-3754-1498
Current Organisation
University of St Andrews
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Publisher: Elsevier BV
Date: 12-2022
Publisher: Proceedings of the National Academy of Sciences
Date: 05-09-2017
Abstract: Cold and dry glacial-state climate conditions persisted in the Southern Hemisphere until approximately 17.7 ka, when paleoclimate records show a largely unexplained sharp, nearly synchronous acceleration in deglaciation. Detailed measurements in Antarctic ice cores document exactly at that time a unique, ∼192-y series of massive halogen-rich volcanic eruptions geochemically attributed to Mount Takahe in West Antarctica. Rather than a coincidence, we postulate that halogen-catalyzed stratospheric ozone depletion over Antarctica triggered large-scale atmospheric circulation and hydroclimate changes similar to the modern Antarctic ozone hole, explaining the synchronicity and abruptness of accelerated Southern Hemisphere deglaciation.
Publisher: American Geophysical Union (AGU)
Date: 05-11-2011
DOI: 10.1029/2011PA002174
Publisher: American Geophysical Union (AGU)
Date: 07-2019
DOI: 10.1029/2018PA003444
Publisher: Springer Science and Business Media LLC
Date: 12-10-2020
Publisher: American Association for the Advancement of Science (AAAS)
Date: 18-11-2022
Abstract: Using new and published marine fossil radiocarbon ( 14 C/C) measurements, a tracer uniquely sensitive to circulation and air-sea gas exchange, we establish several benchmarks for Atlantic, Southern, and Pacific deep-sea circulation and ventilation since the last ice age. We find the most 14 C-depleted water in glacial Pacific bottom depths, rather than the mid-depths as they are today, which is best explained by a slowdown in glacial deep-sea overturning in addition to a “flipped” glacial Pacific overturning configuration. These observations cannot be produced by changes in air-sea gas exchange alone, and they underscore the major role for changes in the overturning circulation for glacial deep-sea carbon storage in the vast Pacific abyss and the concomitant drawdown of atmospheric CO 2 .
Publisher: American Geophysical Union (AGU)
Date: 12-2020
DOI: 10.1029/2020PA003869
Location: United States of America
Location: United Kingdom of Great Britain and Northern Ireland
Location: United States of America
Location: United States of America
No related grants have been discovered for Andrea Burke.