From theory to RAPID AMOC observations: a personal voyage of discovery

Area of Science:

• Oceanography
• Climate Science
• Geophysics

Background:

• The Atlantic Meridional Overturning Circulation (AMOC) is a critical component of Earth's climate system.
• Understanding AMOC variability is essential for predicting climate change impacts.
• Early attempts to model AMOC dynamics faced significant theoretical challenges.

Purpose of the Study:

• To review the historical development of the RAPID monitoring system for the AMOC.
• To highlight theoretical advancements enabling the establishment of the RAPID array.
• To propose future research directions for improving AMOC variability understanding.

Main Methods:

• Review of historical scientific ideas and personal career milestones.
• Theoretical advancements in predicting boundary densities and invoking geostrophic balance.
• Establishment and utilization of the RAPID monitoring array at 26.5° N.

Main Results:

• The RAPID array, based on boundary density monitoring and geostrophy, was successfully established.
• RAPID observations revealed significant sub-seasonal variability in the AMOC.
• These findings have spurred AMOC monitoring efforts at other latitudes.

Conclusions:

• Continued observations and high-resolution simulations are crucial for understanding AMOC variability.
• Theoretical advancements, including distinguishing convective mixing from sinking and understanding density perturbation propagation, are key.
• Future research will integrate these concepts to enhance AMOC process understanding.