What question did this study set out to answer?

To determine the influence of Earth's orbital parameters on cyclic ice-rafting episodes in the Northeast Atlantic Ocean over the past 130,000 years.

March 1, 1988Quaternary Research

Origin and Consequences of Cyclic Ice Rafting in the Northeast Atlantic Ocean During the Past 130,000 Years

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Authors

HHHartmut HeinrichMinistry of Transport, Maritime Affairs and Communications

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Implication

Deep-sea sediment core analysis reveals cyclic ice rafting occurring every 11,000 years in the Northeast Atlantic, highlighting orbital precession as a primary driver of global climate changes.

Key Points

To determine the influence of Earth's orbital parameters on cyclic ice-rafting episodes in the Northeast Atlantic Ocean over the past 130,000 years.
Examined deep-sea sediment cores from the Northeast Atlantic Ocean covering the past 130,000 years before present.
Quantified coarse-grained ice-rafted debris (dropstones) and planktonic foraminiferal assemblages to track shifts in polar surface waters and orbital cycles.
Identified dropstone layer deposition occurring systematically every half precessional cycle (11,000 ± 1,000 years).
Observed ice rafting during both winter minimum/summer maximum and summer minimum/winter maximum insolation phases, with each driving polar water southward via meltwater discharge or continental iceberg calving.

Cite This Study

Hartmut Heinrich (1988) studied this question.

synapsesocial.com/papers/69d7b9ec05ee2ba81dbed860 https://doi.org/10.1016/0033-5894(88)90057-9

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Implication

Deep-sea sediment core analysis reveals cyclic ice rafting occurring every 11,000 years in the Northeast Atlantic, highlighting orbital precession as a primary driver of global climate changes.

Origin and Consequences of Cyclic Ice Rafting in the Northeast Atlantic Ocean During the Past 130,000 Years

Discussion

Member takes

Implication

Key Points

Cite This Study

Origin and Consequences of Cyclic Ice Rafting in the Northeast Atlantic Ocean During the Past 130,000 Years

Discussion

Member takes

Implication

Key Points

Cite This Study

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