Western Mediterranean planktonic foraminifera events and millennial climatic variability during the last 70 kyr

Pérez-Folgado, Marta; Sierro, Francisco J.; Flores, José Abel; Cacho, Isabel; Grimalt, Joan O.; Zahn, Rainer; Shackleton, N. J.

doi:10.1016/s0377-8398(02)00160-3

Cited by 134 publications

(116 citation statements)

References 43 publications

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“…Contrary to G. ruber, G. inflata thrives under normal salinity conditions as during its life cycle this species undergoes vertical migrations from shallow to intermediate water depths with low vertical salinity gradients (Martinez et al, 2007). A similar inverse correlation between these two species, as noticed by us for MIS 11c, is also recognized in various cores from the western Mediterranean basin for the Holocene African Wet Period (Pérez-Folgado et al, 2003). Our data do not allow to speculate in detail about the origin of increased moisture supply embedded in the 975 records.…”

Section: Dynamics Of Sea-surface Properties In the Lower Latitudessupporting

confidence: 79%

“…Here, as well as in the Caribbean Sea, the relative abundances of these two species appear to exhibit an inverse correlation to salinity (Pérez-Folgado et al, 2003;Martinez et al, 2007).…”

Section: Planktic Foraminiferal Census Counts and Foraminiferal Sst Cmentioning

confidence: 64%

“…Because foraminiferal abundances at Site 958 appear affected by dissolution to some degree, meridional SST gradients were also calculated from alkenones. In core M23063 foraminiferal counts were carried out also from the Holocene section while the other Holocene foraminiferal records were taken from previous studies (Table 1; deMenocal et al, 2000a;Bauch, 2002, 2003;Pérez-Folgado et al, 2003).…”

Section: Planktic Foraminiferal Census Counts and Foraminiferal Sst Cmentioning

confidence: 99%

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The meridional temperature gradient in the eastern North Atlantic during MIS 11 and its link to the ocean–atmosphere system

Kandiano

Bauch

Fahl

et al. 2012

Palaeogeography, Palaeoclimatology, Palaeoecology

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Temporal and spatial patterns in eastern North Atlantic sea-surface temperatures (SST) were reconstructed for marine isotope stage (MIS) 11c using a submeridional transect of five sediment cores. The SST reconstructions are based on planktic foraminiferal abundances and alkenone indices, and are supported by benthic and planktic stable isotope measurements, as well as by ice-rafted debris content in polar and middle latitudes. Additionally, the larger-scale dynamics of the precipitation regime over northern Africa and the western Mediterranean region was evaluated from iron concentrations in marine sediments off NW Africa and planktic δ 13 C in combination with analysis of planktic foraminiferal abundances down to the species level in the Mediterranean Sea. Compared to the modern situation, it is revealed that during entire MIS 11c sensu stricto (ss), i.e., between 420 and 398 ka according to our age models, a cold SST anomaly in the Nordic seas co-existed with a warm SST anomaly in the middle latitudes and the subtropics, resulting in steeper meridional SST gradients than during the Holocene. Such a SST pattern correlates well with a prevalence of a negative mode of the modern North Atlantic Oscillation. We suggest that our scenario might partly explain the longer duration of wet conditions in the northern Africa during MIS 11c compared to the Holocene.

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Section: Dynamics Of Sea-surface Properties In the Lower Latitudessupporting

confidence: 79%

“…Here, as well as in the Caribbean Sea, the relative abundances of these two species appear to exhibit an inverse correlation to salinity (Pérez-Folgado et al, 2003;Martinez et al, 2007).…”

Section: Planktic Foraminiferal Census Counts and Foraminiferal Sst Cmentioning

confidence: 64%

Section: Planktic Foraminiferal Census Counts and Foraminiferal Sst Cmentioning

confidence: 99%

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The meridional temperature gradient in the eastern North Atlantic during MIS 11 and its link to the ocean–atmosphere system

Kandiano

Bauch

Fahl

et al. 2012

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…According to JimenezEspejo et al (2008) and Pérez-Folgado et al (2003) these conditions ended between~7.7 and~7.2 ka BP, when a major oceanographic change occurred, giving rise to the modern setting of eddies and frontal circulation patterns of the Western Mediterranean Sea. The abundance curve of N. incompta from Maya MV reverses its trend with respect to the Globigerinoides spp.…”

Section: Maya Mud Volcanomentioning

confidence: 99%

Growth and demise of cold-water coral ecosystems on mud volcanoes in the West Alboran Sea: The messages from the planktonic and benthic foraminifera

et al. 2011

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The Dhaka and Maya mud volcanoes (MVs), located in the Mud Diapir Province in the Western Alboran Basin along the Moroccan Coasts, were cored during the TTR-17, Leg 1 cruise. Cores were taken on the top of the volcanoes at a water depth of 370 m on the Dhaka MV (core TTR17-MS411G) and at 410 m water depth on the Maya MV (core TTR17-MS419G), respectively. On both mud volcanoes the extruded mud breccia provides the nucleation point for the colonization and development of cold-water corals and associated ecosystems. Two phases of cold-water coral growth are observed: (1) between slightly older than 4175± 62 years BP and around 2230± 59 years BP at Dhaka, and (2) between slightly older than 15583 ± 185 years BP and around 7613 ± 38 years BP at Maya MV. On the top of the Maya MV only a small patch reef and/or isolated corals proliferated, whereas a more extended patch reef colonized the top of the Dhaka MV. At both sites the cold-water coral development was triggered by the availability of a suitable substrate for initial coral settling, provided either as a firm ground or as single clasts. Subsequently coral growth was supported by enhanced nutrient flux possibly related to upwelling and/or strong currents. During the intervals of coral growth planktonic foraminiferal assemblages were dominated by Neogloboquadrina incompta. The decline of coral ecosystems on the mud volcanoes is accompanied at surface by a shift from the N. incompta dominated assemblage to a Globorotalia inflata dominated assemblage, possibly reflecting more oligotrophic conditions. This shift is coeval to the passage from wet to arid conditions at the end of the African Humid Period at Maya MV. It is interpreted as an effect of an early human impact on a fragile environment, which was already stressed by desiccation at the time of the development of complex human society along the Mediterranean coasts, at Dhaka MV.

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“…Green, black and red curves indicate confidence levels at respectively 95, 90 and 85%. (Rohling et al, 1998;Cacho et al, 1999;Pérez-Folgado et al, 2003;Sierro et al, 2005), and interpreted as the entrance of this species into the Mediterranean Sea during the southward shift of the Polar Front in the North Atlantic during the slow-down of North Atlantic Deep Water (NADW) formation. We argue that the lower abundance of N. pachyderma sx in both the eastern and the western Mediterranean Sea after the MPT is paradoxical, since colder conditions and a much thicker ice accumulation in Greenland and Antarctica sheets are documented (Lisiecki and Raymo, 2005).…”

Section: The Distribution Of N Pachyderma Sxmentioning

confidence: 99%

Orbital variations in planktonic foraminifera assemblages from the Ionian Sea during the Middle Pleistocene Transition

Incarbona

Dinarès-Turell

Stefano

et al. 2013

Palaeogeography, Palaeoclimatology, Palaeoecology

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The Middle Pleistocene Transition (1.2-0.7 Ma) is the most recent re-organization of the global climate system which includes variations in the frequency and amplitude of glacial/interglacial cycles, increased ice sheet volume, sea surface temperature cooling and a significant drop in the CO 2 atmospheric levels. Here we present high-resolution planktonic foraminifera data (mean sampling resolution of about 780 years) from core LC10 recovered in the Ionian Sea (eastern Mediterranean), between 1.2 and 0.9 Ma. Selected taxa, among them G. ruber, T. quinqueloba and G. bulloides, show significant periodicities that can be associated to orbital cycles, mainly precession and obliquity. The planktonic foraminifera based paleoclimatic curve exhibits a cooling linear trend that can be associated to similar phenomena observed in the North Atlantic. On the other hand, we refer to the influence of the North African Monsoon the occurrence of two peaks of the low-salinity tolerant species G. quadrilobatus that fall in coincidence of sapropel layers. Finally, we discuss the distribution pattern of N. pachyderma sinistral coiling, with peaks up to about 20% between MIS 30 and 28, and compare it to middle-late Quaternary records of the Sicily Channel and western Mediterranean.

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Western Mediterranean planktonic foraminifera events and millennial climatic variability during the last 70 kyr

Cited by 134 publications

References 43 publications

The meridional temperature gradient in the eastern North Atlantic during MIS 11 and its link to the ocean–atmosphere system

The meridional temperature gradient in the eastern North Atlantic during MIS 11 and its link to the ocean–atmosphere system

Growth and demise of cold-water coral ecosystems on mud volcanoes in the West Alboran Sea: The messages from the planktonic and benthic foraminifera

Orbital variations in planktonic foraminifera assemblages from the Ionian Sea during the Middle Pleistocene Transition

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