|
|
|
|
|
| Becquey, S; Gersonde, R. |
| Estimates of summer sea surface temperatures (SSSTs) derived from planktic foraminiferal associations using the Modern Analog Technique and combined with isotopic analyses and determination of ice-rafted debris, mirror the Pleistocene evolution of the planktic Subantarctic surface waters in the Atlantic Ocean. The SSSTs indicate that the isotherms that define the modern polar front zone and Subantarctic front, were located at more northerly latitudes (up to 7degrees) during most of the investigated period, which covers the past 550 kyr. Exceptions are during climatic optima in the early Holocene, at marine isotope stages (MIS) 5.5, 7.1, 7.5, 9.3, and presumably during MIS 11.3 when SSSTs exceeded modern values by 1degrees-5degreesC. The close similarity... |
| Tipo: Text |
Palavras-chave: Subantarctic zone; Sea surface temperatures; Planktic foraminifers; Ice rafted debris; Climate. |
| Ano: 2003 |
URL: https://archimer.ifremer.fr/doc/00224/33501/31947.pdf |
| |
|
| |
|
|
| Mcclymont, Erin L.; Sosdian, Sindia M.; Rosell-mele, Antoni; Rosenthal, Yair. |
| mid-Pleistocene climate transition (MPT) is defined by the emergence of high amplitude, quasi-100 ka glacial-interglacial cycles from a prior regime of more subtle 41 ka cycles. This change in periodicity and amplitude cannot be explained by a change in 'external' astronomical forcing. Here, we review and integrate published records of sea-surface temperatures (SSTs) to assess whether a common global expression of the MPT in the surface ocean can be recognized, and examine our findings in light of mechanisms proposed to explain climate system reorganization across the MPT. We show that glacial-interglacial variability in SSTs is superimposed upon a longer-term cooling trend in oceanographic systems spanning the low-to high-latitudes. Regional variability... |
| Tipo: Text |
Palavras-chave: Sea surface temperatures; Mid-Pleistocene transition; Ice sheets; 100 kyr world. |
| Ano: 2013 |
URL: https://archimer.ifremer.fr/doc/00264/37510/82770.pdf |
| |
|
| |
|
|
| Setiawan, Riza Yuliratno; Mohtadi, Mahyar; Southon, John; Groeneveld, Jeroen; Steinke, Stephan; Hebbeln, Dierk. |
| The advection of relatively fresh Java Sea water through the Sunda Strait is presently responsible for the low-salinity tongue in the eastern tropical Indian Ocean with salinities as low as 32. The evolution of the hydrologic conditions in the eastern tropical Indian Ocean since the last glacial period, when the Sunda shelf was exposed and any advection via the Sunda Strait was cutoff, and the degree to which these conditions were affected by the Sunda Strait opening are not known. Here we have analyzed two sediment cores (GeoB 10042-1 and GeoB 10043-3) collected from the eastern tropical Indian Ocean off the Sunda Strait that cover the past similar to 40,000years. We investigate the magnitude of terrigenous supply, sea surface temperature (SST), and... |
| Tipo: Text |
Palavras-chave: Indian Ocean; Sunda Strait; Seawater oxygen isotopes; Java Sea; Sea surface temperatures; Terrigenous supply. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00496/60729/65238.pdf |
| |
|
|
|
