Deep Atlantic variability during the last interglacial period
نویسندگان
چکیده
منابع مشابه
Rapid reductions in North Atlantic Deep Water during the peak of the last interglacial period.
Deep ocean circulation has been considered relatively stable during interglacial periods, yet little is known about its behavior on submillennial time scales. Using a subcentennially resolved epibenthic foraminiferal δ(13)C record, we show that the influence of North Atlantic Deep Water (NADW) was strong at the onset of the last interglacial period and was then interrupted by several prominent ...
متن کاملThe deep ocean during the last interglacial period.
Oxygen isotope analysis of benthic foraminifera in deep sea cores from the Atlantic and Southern Oceans shows that during the last interglacial period, North Atlantic Deep Water (NADW) was 0.4 degrees +/- 0.2 degrees C warmer than today, whereas Antarctic Bottom Water temperatures were unchanged. Model simulations show that this distribution of deep water temperatures can be explained as a resp...
متن کاملRapid sea-level fall and deep-ocean temperature change since the last interglacial period
We have dated Huon Peninsula, Papua New Guinea and Barbados corals that formed at times since the Last Interglacial Period, applying both 230Th and 231Pa dating techniques as a test of age accuracy. We show that Marine Isotope Stage (MIS) 5e ended prior to 113.18 0.7 kyr, when sea level was 319 m. During MIS 5b sea level was 357 m at 92.68 0.5 kyr, having dropped about 40 m in approximately 10 ...
متن کاملNorth Atlantic Deep Water Production during the Last Glacial Maximum
Changes in deep ocean ventilation are commonly invoked as the primary cause of lower glacial atmospheric CO2. The water mass structure of the glacial deep Atlantic Ocean and the mechanism by which it may have sequestered carbon remain elusive. Here we present neodymium isotope measurements from cores throughout the Atlantic that reveal glacial-interglacial changes in water mass distributions. T...
متن کاملRapid switches in subpolar North Atlantic hydrography and climate during the Last Interglacial (MIS 5e)
[1] At the peak of the previous interglacial period, North Atlantic and subpolar climate shared many features in common with projections of our future climate, including warmer-than-present conditions and a diminished Greenland Ice Sheet (GIS). Here we portray changes in North Atlantic hydrography linked with Greenland climate during Marine Isotope Stage (MIS) 5e using (sub)centennially sampled...
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ژورنال
عنوان ژورنال: Past Global Changes Magazine
سال: 2015
ISSN: 2411-605X,2411-9180
DOI: 10.22498/pages.23.1.20