A huge drop in sea levels trapped extremely salty water in the Indian Ocean, which then gushed into the Atlantic when currents changed 15,000 years ago.
Extremely salty water flooding into the Atlantic Ocean from the Indian Ocean may have contributed to the end of the last ice age 15,000 years ago, researchers have found.
Scientists already knew that the end of the last ice age saw significant changes in ocean currents and salinity, but until now they were unsure how this occurred."We discovered more than ten years ago that the end of the ice age saw a massive pulse in Atlantic currents, which helped usher in warmer interglacial conditions," Steve Barker , a professor of earth science at Cardiff University in Wales who participated in the research, said in a statement .
In the new study, published Wednesday in the journal Nature , researchers describe how drops in sea levels during glacial periods over the last 1.2 million years drove a huge increase in salt concentrations in the Indian Ocean. The cold temperatures locked so much water from the oceans in giant ice sheets that sea levels fell by an average of 157 feet compared with sea levels today.
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