- Salt crystals left behind on extremely cold tropical sea ice may have reflected as much as 93% of incoming sunlight, amplifying the cooling that drove Snowball Earth.
- A new climate model produced two stable globally frozen states, with the salt-covered version substantially colder and more difficult to thaw than the version without salt.
- The researchers do not argue that salt triggered Snowball Earth, and the proposed feedback still needs testing in models that include moving ice,…
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