American Geophysical Union (AGU)
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Paleoenvironmental implications of rock‐magnetic properties of Late Quaternary sediment cores from the eastern equatorial Atlantic
American Geophysical Union (AGU) - Tập 3 Số 1 - Trang 61-87 - 1988
Rapid and nondestructive rock‐magnetic measurements of late Quaternary sediment
cores from the Senegal continental slope and the Sierra Leone Rise in the
eastern equatorial Atlantic correlate strongly with the SPECMAP oxygen isotope
master curve and carbonate content. The rock‐magnetic‐paleoclimatic relationship
results from differences in the concentration, accumulation rate, grain size,
and comp...
Synchronous and proportional deglacial changes in Atlantic meridional overturning and northeast Brazilian precipitation
American Geophysical Union (AGU) - Tập 32 Số 6 - Trang 622-633 - 2017
AbstractChanges in heat transport associated with fluctuations in the strength
of the Atlantic meridional overturning circulation (AMOC) are widely considered
to affect the position of the Intertropical Convergence Zone (ITCZ), but the
temporal immediacy of this teleconnection has to date not been resolved. Based
on a high‐resolution marine sediment sequence over the last deglaciation, we
provide ...
Late Cenozoic environments in the Barents Sea
American Geophysical Union (AGU) - Tập 3 Số 5 - Trang 601-612 - 1988
We examine the paleoceanography and paleogeography of the Barents Sea during the
late Cenozoic glacial regime by seismostratigraphy and core analysis. During the
smaller glaciations which probably dominated the first period of the glaciogenic
regime (approximately 2.5–0.8 Ma?), glaciomarine processes with sediment influx
from the adjacent mainland prevailed. The Barents Sea has been covered by
gro...
New aspects of organic carbon deposition and its paleoceanographic implications along the Northern Barents Sea Margin during the last 30,000 years
American Geophysical Union (AGU) - Tập 13 Số 4 - Trang 384-394 - 1998
We studied variations in terrigenous (TOM) and marine organic matter (MOM) input
in a sediment core on the northern Barents Sea margin over the last 30 ka. Using
a multiproxy approach, we reconstructed processes controlling organic carbon
deposition and investigated their paleoceanographic significance in the North
Atlantic‐Arctic Gateways. Variations in paleo‐surface‐water productivity are not
do...
Changes in the flow of Atlantic water into the Arctic Ocean since the last deglaciation: Evidence from the northern Svalbard continental margin, 80°N
American Geophysical Union (AGU) - Tập 20 Số 4 - 2005
The Svalbard archipelago is located in the high Arctic (76°–80°N) within the
northernmost reach of the West Spitsbergen Current, which is the continuation of
the North Atlantic Current. In this specific setting close to the Polar Front,
even small variations in the current system are expected to give large and
distinct signals in paleoceanographic parameters. Thus the Svalbard area is
ideal for mo...
Multidecadal variations in the Early Holocene outflow of Red Sea water into the Arabian Sea
American Geophysical Union (AGU) - Tập 16 Số 6 - Trang 658-668 - 2001
We present Holocene stable oxygen isotope data from the deep Arabian Sea off
Somalia at a decadal time resolution as a proxy for the history of
intermediate/upper deep water. These data show an overall δ18O reduction by 0.5‰
between 10 and ∼6.5 kyr B.P. superimposed upon short‐term δ18O variations at a
decadal‐centennial timescale. The amplitude of the decadal variations is 0.3‰
prior, and up to 0...
Younger Dryas‐Style Cooling Events at Glacial Terminations I‐VI at ODP Site 658: Associated benthic δ13C anomalies constrain meltwater hypothesis
American Geophysical Union (AGU) - Tập 5 Số 6 - Trang 1041-1055 - 1990
High‐resolution planktonic and epibenthic stable isotope records from Ocean
Drilling Program site 658 off northwest Africa provide a basis for a detailed
study of glacial terminations I‐VI during the last 650,000 years. The duration
of the terminations was about one half to one quarter of an orbital precession
cycle (5800–10,700 years), when its amplitude was high. At low amplitudes, the
terminati...
Southwest Monsoon Circulation and Environments of Recent Planktonic Foraminifera in the Northwestern Arabian Sea
American Geophysical Union (AGU) - Tập 7 Số 6 - Trang 799-813 - 1992
Digital hydrographic data combined with satellite thermal infrared and visible
band remote sensing provide a synoptic climatological view of the shallow
planktonic environment. This paper uses wind, hydrographic, and ocean remote
sensing data to examine southwest monsoon controls on the foraminiferal faunal
composition of Recent seafloor sediments of the northwestern Arabian Sea. Ekman
pumping res...
Glacial conditions in the Red Sea
American Geophysical Union (AGU) - Tập 9 Số 5 - Trang 653-660 - 1994
In this paper, results from previous studies on planktonic foraminifera, δ18O,
and global sea level are combined to discuss climatic conditions in the Red Sea
during the last glacial maximum (18,000 B.P.). First, the influence of 120‐m sea
level lowering on the exchange transport through the strait of Bab‐el‐Mandab is
considered. This strait is the only natural connection of the Red Sea to the
ope...
Glacial/interglacial changes in the equatorial part of the Somali Basin (NW Indian Ocean) during the last 355 kyr
American Geophysical Union (AGU) - Tập 12 Số 5 - Trang 640-648 - 1997
Planktonic foraminiferal and radiolarian signatures are analyzed in the 355 kyr
record of a core from the equatorial part of the Somali Basin in order to
reconstruct the amplitude of oceanographic processes and to test the
reproducibility of the biological response to the glacial/interglacial changes
over four climatic cycles. The correspondence analysis applied to the faunal
data set reveals that...
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