Ocean Circulation
Scientists at the University of California, Riverside have identified a weakening Atlantic Meridional Overturning Circulation as the cause of a persistent cold water patch south of Greenland, observed for over a century. This slowdown in the ocean's climate-regulating conveyor belt explains the region's cooling and freshening trends. The findings, based on a century of temperature and salinity data, improve climate model accuracy and highlight ongoing shifts.
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A new study reveals that shifts in Antarctic Bottom Water circulation around 18,000 to 10,000 years ago drove the release of stored carbon into the atmosphere, contributing to the warming at the end of the last Ice Age. Researchers analyzed sediment cores to trace these changes, highlighting the Southern Ocean's role in the global carbon cycle. The findings suggest implications for modern Antarctic ice melt and climate projections.