H
Howard J. Spero
Researcher at University of California, Davis
Publications - 154
Citations - 14805
Howard J. Spero is an academic researcher from University of California, Davis. The author has contributed to research in topics: Foraminifera & Glacial period. The author has an hindex of 56, co-authored 152 publications receiving 13865 citations. Previous affiliations of Howard J. Spero include University of the West Indies & University of California.
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Journal ArticleDOI
Climate Impact of Late Quaternary Equatorial Pacific Sea Surface Temperature Variations
TL;DR: Comparison of SST estimates from eastern and western sites indicates that the equatorial Pacific zonal SST gradient was similar or somewhat larger during glacial episodes, and extraction of a salinity proxy from the magnesium/calcium and oxygen isotope data indicates that transport of water vapor into the western Pacific was enhanced duringglacial episodes.
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Reevaluation of the oxygen isotopic composition of planktonic foraminifera: Experimental results and revised paleotemperature equations
TL;DR: In this paper, Orbulina universa and Globigerina bulloides were used to reexamine temperature:δ18O relationships at 15°-25°C.
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Effect of seawater carbonate concentration on foraminiferal carbon and oxygen isotopes
TL;DR: In this paper, the authors reported experimental measurements on living symbiotic and non-symbiotic plankton foraminifera (Orbulina universa and Globigerina bulloides respectively) showing that the 13C/12C and 18O/16O ratios of the calcite shells decrease with increasing seawater [CO32−].
Journal Article
Effect of seawater carbonate concentration on foraminiferal carbon and oxygen isotopes
TL;DR: In this article, experimental measurements on living symbiotic and non-symbiotic plankton foraminifera (Orbulina universa and Globigerina bulloides respectively) showed that the 13C/12C and 18O/16O ratios of the calcite shells decrease with increasing seawater [CO32−].
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Controls on magnesium and strontium uptake in planktonic foraminifera determined by live culturing
TL;DR: In this paper, the authors have cultured Globigerina bulloides and Orbulina universa to establish the influence of temperature, pH, and salinity on calcification of planktonic foraminifera.