Nature 2020 01 30 Part.01

(Ann) #1

Article


Extended Data Fig. 2 | Sea-level records for the last two terminations and
interglaciations. a, Sea-level reconstructions for the penultimate deglaciation
and the LIG (the latter identified by the grey-shaded area). The eustatic sea-
level record is based on benthic foraminifera isotopes (blue line with 1σ
uncertainty)^1 and the RSL record is based on Red Sea isotopes (grey crosses;
green line, 1-kyr moving Gaussian filter)^34 placed on a revised age model^91. Also
shown are RSL data from U-series dated corals at Tahiti (sky blue circles)^92 , the
Huon Peninsula (light blue–green circle; altered samples shown by grey
circles)^93 , the Seychelles (light green circles)^25 , western Australia (blue circles)^24
and the Bahamas (cyan circles)^24. All of the U-series ages have been recalculated
to normalize them with the same set of decay constants for^234 U and^230 Th
(ref. ^94 ) and are shown with 2σ age uncertainty. We note that the offset between
the Red Sea record (green line) and the benthic foraminifera record (blue line)
may ref lect the complex three-dimensional Earth structure in the vicinity of


the Red Sea rift^95 ,^96. The variability in the Red Sea and Huon Peninsula RSL
records may ref lect a sea-level reversal at ~137 ka (ref. ^91 ), which, if it existed, was
too small to be recorded by the benthic foraminiferal record. The rate of sea-
level change based on the benthic foraminiferal record is also shown. b, Sea-
level reconstructions for the last deglaciation and the present interglaciation
(the latter identified by the grey-shaded area). The record of global mean sea
level is based on benthic foraminifera isotopes (blue line with 1σ uncertainty)^1.
Also shown are individual sea-level estimates (black circles, 2σ uncertainty)
that have been corrected for glacial isostatic adjustment^97. The rate of sea-level
change based on the benthic foraminiferal record is also shown. c, Top, eustatic
sea-level reconstructions for the penultimate deglaciation (blue line with 1σ
uncertainty) and the last deglaciation (black line with 1σ uncertainty)^1. Bottom,
21 June insolation for 65° N for the penultimate deglaciation (blue line) and the
last deglaciation (black line)^7.
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