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A23a Iceberg Shrinks 80%, Disrupting Global Climate Dynamics

9/5/2025

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Summary

Story summary

The A23a iceberg, once the largest, has lost about 80% of its mass since May 2025.
Scientists from the British Antarctic Survey report A23a now measures approximately 1,700 square kilometers.
A23a broke off Antarctica's Filchner-Ronne ice shelf in 1986 and remained grounded for over 30 years.
Its melting may disrupt ocean salinity and thermohaline circulation, affecting global climate.
D15a is now the largest iceberg, as A23a continues to fragment.

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Story summary

The A23a iceberg, once the largest, has lost about 80% of its mass since May 2025.
Scientists from the British Antarctic Survey report A23a now measures approximately 1,700 square kilometers.
A23a broke off Antarctica's Filchner-Ronne ice shelf in 1986 and remained grounded for over 30 years.
Its melting may disrupt ocean salinity and thermohaline circulation, affecting global climate.
D15a is now the largest iceberg, as A23a continues to fragment.