Antarctic Ocean Alarming Shift: Deep Currents Slowing, Oxygen Levels Declining.

Antarctic sea ice has hit record lows, with levels falling below average every day so far in 2023. The current extent is about 1.8 million square kilometers below the average for this time of year, and scientists are concerned about an enduring pattern. Losing sea ice won't add to sea levels, but it plays a critical role in protecting Antarctica's colossal ice shelves from deteriorating. The loss of sea ice will also affect the efficiency with which the oceans distribute energy, ultimately affecting the global climate. It's unclear whether this year's record low is due to natural variability or climate change.