[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)