Vema Channel Paleo-Oceanography: Pleistocene Dissolution Cycles and Episodic Bottom Water Flow

Johnson, David A.; Ledbetter, Michael T.; Burckle, Lloyd H.

doi:10.1016/s0070-4571(08)70548-x

Cited by 6 publications

(7 citation statements)

References 17 publications

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“…On the basis of depth transect observations [ Berger , 1982; Johnson et al , 1977; Peterson and Prell , 1985], foraminiferal fragmentation increases as dissolution increases [ Bassinot et al , 1994a; Howard and Prell , 1994]. Shells are more easily broken as shell walls are thinned during dissolution [ Bé et al , 1975].…”

Section: Resultsmentioning

confidence: 99%

Western Caribbean sea surface temperatures during the late Quaternary

Schmidt

Vautravers

Spero

2006

Geochem Geophys Geosyst

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[1] Mg/Ca ratios in the planktonic foraminifera Globigerinoides ruber from Colombian Basin core ODP 999A suggest that Caribbean sea surface temperatures (SSTs) were from 2.1 to 2.7°C colder than the present during the last three glacial maximums. In comparison, faunal derived SSTs (SIMMAX method) show that August SSTs in the Caribbean varied <2°C over the past 360 kyr, whereas February SSTs varied between 21.0°C and 26.5°C. Changes in the Mg/Ca-SST record contain a strong 23 kyr periodicity, suggesting the Mg/Ca-SST record reflects a warm season weighted SST average rather than an annual mean SST. Combining several dissolution indices, we identify brief periods of decreased carbonate preservation in our record and show that MIS 11 stands out as the most intensive dissolution cycle in the Caribbean over the last 460 kyr. Comparison of Caribbean SST change with a similar estimate of tropical SST variability in the western Pacific over the past 360 kyr reveals shifts in the east-west tropical SST gradient that are coeval with glacial-interglacial climate change and consistent both with a southward migration of the glacial ITCZ and with a glacial El Niño-like mode of tropical circulation.

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Section: Resultsmentioning

confidence: 99%

Western Caribbean sea surface temperatures during the late Quaternary

Schmidt

Vautravers

Spero

2006

Geochem Geophys Geosyst

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“…Displaced Antarctic diatom floras have been noted along the east coast of South America in Pleistocene and Holocene sediments (Burckle and Stanton, 1975;Johnson et al, 1977;Jones and Johnson, 1984). Displaced Antarctic diatoms have also been reported from other areas, including the Pacific Ocean (Booth and Burckle, 1976), the Indian Ocean (Burckle et al, 1974;Burckle, 1981), and the Madagascar Basin (Warren, 1974).…”

Section: Occurrences Of the Transantarctic Flora Species Outside The mentioning

confidence: 98%

WITHDRAWN: Antiophidian properties of a dolastane diterpene isolated from the marine brown alga Canistrocarpus cervicornis

Moura

Sanchez

Bianco

et al. 2010

Biomedicine & Pharmacotherapy

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“…We ascertain that our core tops are Holocene through radiocarbon ages where available and published down core percent carbonate records in comparison with δ 18 O stratigraphy (Table ). Many studies have shown that the main features of the CaCO 3 abundance record and δ 18 O stratigraphy in cores from RIO and the Vema Channel are in phase (Johnson et al, ; Jones et al, ; Peters, ; Williams & Ledbetter, ).…”

Section: Methodsmentioning

confidence: 99%

Field Testing the Fidelity of δ¹⁸O and δ¹³C in Reconstructing Upper Ocean Hydrography

Mekik

Winkelstern

2020

Paleoceanog and Paleoclimatol

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Stable isotope data from tests of four planktonic foraminifer species in core tops on the Rio Grande Rise (RIO) fail a field test of reproducibility until corrections are made for various environmental effects. The regionally uniform and strongly stratified surface ocean hydrography across RIO allows the identification of causes of variability in δ18O and δ13C data in addition to the effects of surface ocean temperature and nutrient content. A previously calibrated calcite dissolution proxy indicates that the dissolution of foraminifer shells in sediments has no effect on δ18O and δ13C in tests of foraminifers from core tops on RIO. Furthermore, vital effects within and among foraminifer species are not sufficient to explain the large variability of δ18O and δ13C data observed on RIO. Instead, correctly estimating species‐specific habitat depth ranges and adjusting δ13C values for ocean/atmosphere carbon exchange are necessary to accurately reconstruct the hydrography of surface waters on RIO.

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Vema Channel Paleo-Oceanography: Pleistocene Dissolution Cycles and Episodic Bottom Water Flow

Cited by 6 publications

References 17 publications

Western Caribbean sea surface temperatures during the late Quaternary

Western Caribbean sea surface temperatures during the late Quaternary

WITHDRAWN: Antiophidian properties of a dolastane diterpene isolated from the marine brown alga Canistrocarpus cervicornis

Field Testing the Fidelity of δ¹⁸O and δ¹³C in Reconstructing Upper Ocean Hydrography

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Vema Channel Paleo-Oceanography: Pleistocene Dissolution Cycles and Episodic Bottom Water Flow

Cited by 6 publications

References 17 publications

Western Caribbean sea surface temperatures during the late Quaternary

Western Caribbean sea surface temperatures during the late Quaternary

WITHDRAWN: Antiophidian properties of a dolastane diterpene isolated from the marine brown alga Canistrocarpus cervicornis

Field Testing the Fidelity of δ18O and δ13C in Reconstructing Upper Ocean Hydrography

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Product

Resources

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Field Testing the Fidelity of δ¹⁸O and δ¹³C in Reconstructing Upper Ocean Hydrography