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Updated: Aug 18, 2025

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A dimensionless framework for predicting submarine fan morphology.

Abdul Wahab1, David C Hoyal2, Mrugesh Shringarpure2

  • 1Department of Earth and Environmental Sciences, Tulane University, New Orleans, LA, 70118, USA. awahab@tulane.edu.

Nature Communications
|December 9, 2022
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Summary
This summary is machine-generated.

This study presents a framework for predicting submarine fan morphology using turbidity current dynamics. Increased densimetric Froude number or decreased Rouse number enhance fan rugosity and carbon sequestration potential.

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Area of Science:

  • Earth Science
  • Oceanography
  • Geology

Background:

  • Field observations of active turbidity currents are limited, hindering the development of theories linking flow dynamics to submarine fan morphology.
  • Understanding submarine fan formation is crucial for predicting sediment deposition and carbon sequestration in deep-ocean environments.

Purpose of the Study:

  • To develop a framework for predicting submarine fan morphologies by simplifying environmental forcings.
  • To establish relationships between turbidity current dynamics (densimetric Froude and Rouse numbers) and submarine fan complexity (rugosity).

Main Methods:

  • Utilized a depth-average process-based numerical model to simulate various submarine fan scenarios.
  • Quantified submarine fan morphological complexity using rugosity as a proxy.
  • Varied densimetric Froude and Rouse numbers to represent different flow dynamics and sediment properties.

Main Results:

  • Demonstrated a systematic increase in submarine fan rugosity with increasing densimetric Froude number.
  • Showed a systematic increase in submarine fan rugosity with decreasing Rouse number.
  • Linked fan morphology trends to channel migration dynamics and the sequestration of organic carbon-rich mud.

Conclusions:

  • The proposed framework effectively predicts submarine fan morphologies based on simplified turbidity current parameters.
  • Turbidity current dynamics significantly influence submarine fan complexity and their capacity for carbon sequestration.
  • Findings aid in discriminating submarine fans based on their potential to store organic carbon in deep-sea sediments.