Modeling the Production of Heinrich Layers With a Sediment‐Enabled Iceberg Model
Name
Paleoceanog and Paleoclimatol - 2023 - Fendrock - Modeling the Production of Heinrich Layers With a Sediment‐Enabled.pdf
Description
Published version
Size
3.05 MB
Format
Adobe PDF
Checksum (MD5)
15b287e8c8a7f0d537e69651f2838f73
Author(s)
Fendrock, Michaela
Condron, Alan
McGee, David
Date Issued
May 19, 2023
Journal
Paleoceanography and Paleoclimatology
Publisher
American Geophysical Union
Citation
Fendrock, M., Condron, A., & McGee, D. (2023). Modeling the production of Heinrich Layers with a sediment-enabled iceberg model. Paleoceanography and Paleoclimatology, 38, e2022PA004583.
Version
Final published version
Abstract
In the North Atlantic, relatively coarse grained sediments can be found periodically throughout sediment cores spanning the Last Glacial Period. These sediments were rafted by icebergs released from the Laurentide Ice Sheet (LIS) in so‐called Heinrich Events. These “Heinrich Layers” coincide with records of global climate change, suggesting that the impact of these events was propagated beyond the North Atlantic. In order to best understand the climate context and significance of Heinrich Events, it is important to constrain the mechanism for their release from the LIS and the nature of the ice sheet itself. One approach for investigating the source of Heinrich Events is to understand the sediment load of icebergs involved, information that would inform interpretations of how those icebergs were produced. By simulating Heinrich Events in a high resolution global climate model (20–40 times the resolution of previous studies), this work investigates the processes involved in the deposition of Heinrich Layers in the North Atlantic. In these simulations, the same volume of sediment is distributed differently through the same volume of icebergs, producing profoundly different sediment records. Due to the high resolution of the model, these simulated sedimentary layers can be inspected in great detail, revealing nuances of the deposit. Only when sediment is distributed throughout the entire iceberg does the model produce a sediment pattern in agreement with observations, yet icebergs with this sediment distribution are not observed in the modern‐day.
MIT Department
Woods Hole Oceanographic Institution
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
10.1029/2022pa004583
