Recent research indicates that the Antarctic Circumpolar Current (ACC) is decreasing in speed

What is the meaning of ACC?

The largest and strongest wind-driven current on Earth is the ACC, which travels clockwise around Antarctica while being influenced by strong westerly winds. It is the only stream that encircles the entire earth and connects the Atlantic, Pacific, and Indian Oceans.

Significance: By acting as a barrier, this specific cold circulation prevents warmer seas from reaching Antarctica, impacts the ocean's ability to absorb heat and carbon dioxide. Stops invasive species like bull kelp, shrimp, and mollusks from coming to Antarctica from other continents.

Reasons why ACC is becoming weaker

Ocean Salinity Changes: The Antarctic Bottom Water (AABW) has become weaker as a result of the accelerated melting of ice shelves surrounding Antarctica brought on by global warming.

AABW is a sinking process and an essential part of the global ocean circulation that is connected to the ACC circulation.

Modifications to Wind Patterns: The Southern Hemisphere's westerly wind pattern may change due to climate change.

Loop of Positive Feedback: Decreased sea ice can worsen freshwater input and warming, generating a vicious cycle that erodes ACC even more.

Possible Repercussions of ACC Weakening

Extreme weather events are becoming more frequent in some areas due to high climate variability.

Global warming has accelerated as a result of the ocean's diminished ability to absorb carbon.

Influence on the food chain as a result of invasive species entering the delicate Antarctic continent. Impact of the AABW's weakening on the world's ocean current system.