Less Remineralized Carbon in the Intermediate‐Depth South Atlantic During Heinrich Stadial 1
نویسندگان
چکیده
منابع مشابه
Pronounced interannual variability in tropical South Pacific temperatures during Heinrich Stadial 1.
The early last glacial termination was characterized by intense North Atlantic cooling and weak overturning circulation. This interval between ~18,000 and 14,600 years ago, known as Heinrich Stadial 1, was accompanied by a disruption of global climate and has been suggested as a key factor for the termination. However, the response of interannual climate variability in the tropical Pacific (El ...
متن کامل231Pa/230Th evidence for a weakened but persistent Atlantic meridional overturning circulation during Heinrich Stadial 1.
The strength of Atlantic meridional overturning circulation is believed to affect the climate over glacial-interglacial and millennial timescales. The marine sedimentary (231)Pa/(230)Th ratio is a promising paleocirculation proxy, but local particle effects may bias individual reconstructions. Here we present new Atlantic sedimentary (231)Pa/(230)Th data from the Holocene, the last glacial maxi...
متن کاملWhat do benthic δ13C and δ18O data tell us about Atlantic circulation during Heinrich Stadial 1?
Approximately synchronous with the onset of Heinrich Stadial 1 (HS1), δC decreased throughout most of the upper (~1000–2500m) Atlantic, and at some deeper North Atlantic sites. This early deglacial δC decrease has been alternatively attributed to a reduced fraction of high-δC North Atlantic Deep Water (NADW) or to a decrease in the NADW δC source value. Here we present new benthic δO and δC rec...
متن کاملEquatorial Pacific forcing of western Amazonian precipitation during Heinrich Stadial 1
Abundant hydroclimatic evidence from western Amazonia and the adjacent Andes documents wet conditions during Heinrich Stadial 1 (HS1, 18-15 ka), a cold period in the high latitudes of the North Atlantic. This precipitation anomaly was attributed to a strengthening of the South American summer monsoon due to a change in the Atlantic interhemispheric sea surface temperature (SST) gradient. Howeve...
متن کاملTiming and structure of Mega-SACZ events during Heinrich Stadial 1
A substantial strengthening of the South American monsoon system (SAMS) during Heinrich Stadials (HS) points toward decreased cross-equatorial heat transport as the main driver of monsoonal hydroclimate variability at millennial time scales. In order to better constrain the exact timing and internal structure of HS1 over tropical South America, we assessed two precisely dated speleothem records...
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ژورنال
عنوان ژورنال: Paleoceanography and Paleoclimatology
سال: 2019
ISSN: 2572-4517,2572-4525
DOI: 10.1029/2018pa003537