[HN Gopher] The Arctic Ocean was covered by a shelf ice and fill... ___________________________________________________________________ The Arctic Ocean was covered by a shelf ice and filled with freshwater Author : gmays Score : 16 points Date : 2021-02-04 21:37 UTC (1 hours ago) (HTM) web link (www.awi.de) (TXT) w3m dump (www.awi.de) | sradman wrote: | The paper _Glacial episodes of a freshwater Arctic Ocean covered | by a thick ice shelf_ [1]: | | > Here we provide evidence for at least two episodes during which | the Arctic Ocean and the adjacent Nordic seas were not only | covered by an extensive ice shelf, but also filled entirely with | fresh water, causing a widespread absence of thorium-230 in | marine sediments. We propose that these Arctic freshwater | intervals occurred 70,000-62,000 years before present and | approximately 150,000-131,000 years before present, corresponding | to portions of marine isotope stages 4 and 6. | | > A freshwater mass of this size--stored in oceans, rather than | land--suggests that a revision of sea-level reconstructions based | on freshwater-sensitive stable oxygen isotopes may be required, | and that large masses of fresh water could be delivered to the | north Atlantic Ocean on very short timescales. | | [1] https://www.nature.com/articles/s41586-021-03186-y ___________________________________________________________________ (page generated 2021-02-04 23:00 UTC)