Search Results - "Thunell, R. C."

Deep water temperature, carbonate ion, and ice volume changes across the Eocene-Oligocene climate transition by Pusz, A. E., Thunell, R. C., Miller, K. G.

“…Paired benthic foraminiferal stable isotope and Mg/Ca data are used to estimate bottom water temperature (BWT) and ice volume changes associated with the…”
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Biogenic nitrogen gas production at the oxic–anoxic interface in the Cariaco Basin, Venezuela by Montes, E, Altabet, M. A, Muller-Karger, F. E, Scranton, M. I, Thunell, R. C, Benitez-Nelson, C, Lorenzoni, L, Astor, Y. M

“…Excess nitrogen gas (N2xs) was measured in samples collected at six locations in the eastern and western sub-basins of the Cariaco Basin, Venezuela, in…”
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Coccolithophore export production in Guaymas Basin, Gulf of California: response to climate forcing by Ziveri, P., Thunell, R.C.

“…The flux and taxonomic composition of coccolithophores has been determined for sediment trap samples collected over a two-year period from Guaymas Basin,…”
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Seasonal and annual variability in particle fluxes in the Gulf of California: A response to climate forcing by Thunell, Robert C.

“…A six-year time series of sediment trap samples is used to document seasonal and interannual changes in particle fluxes in Guaymas Basin, Gulf of California…”
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Organic Carbon Fluxes, Degradation, and Accumulation in an Anoxic Basin: Sediment Trap Results from the Cariaco Basin by Thunell, Robert C., Varela, Ramon, Llano, Martin, Collister, James, Muller-Karger, Frank, Bohrer, Richard

“…Organic carbon fluxes were measured in the anoxic water column of the Cariaco Basin under varying levels of primary productivity. Our results indicate that…”
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Elemental settling and burial fluxes in the Cariaco Basin by Calvert, S.E., Piper, D.Z., Thunell, R.C., Astor, Y.

“…The vertical flux of particles and their interactions within the ocean, together with the global ocean circulation, control the water-column distribution of a…”
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The Medieval Climate Anomaly and Little Ice Age in Chesapeake Bay and the North Atlantic Ocean by Cronin, T.M., Hayo, K., Thunell, R.C., Dwyer, G.S., Saenger, C., Willard, D.A.

“…A new 2400-year paleoclimate reconstruction from Chesapeake Bay (CB) (eastern US) was compared to other paleoclimate records in the North Atlantic region to…”
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Deepwater Expansion and Enhanced Remineralization in the Eastern Equatorial Pacific During the Last Glacial Maximum by Umling, N. E., Thunell, R. C., Bizimis, M.

“…Published estimates of the radiocarbon content of middepth waters suggest a decrease in ventilation in multiple locations during the last glacial maximum (LGM;…”
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Ongoing Increase in Eastern Tropical North Pacific Denitrification as Interpreted Through the Santa Barbara Basin Sedimentary δ15N Record by Davis, C. V., Ontiveros‐Cuadras, J. F., Benitez‐Nelson, C., Schmittner, A., Tappa, E. J., Osborne, E., Thunell, R. C.

“…Decades of observations show that the world's oceans have been losing oxygen, with far‐reaching consequences for ecosystems and biogeochemical cycling. To…”
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Seasonal changes in coccolithophore densities in the Southern California Bight during 1991–1992 by Ziveri, P., Thunell, R.C., Rio, D.

“…Seasonal changes in coccolithophore cell densities in the San Pedro Basin, Southern California Bight, were investigated for the period October 1991 to…”
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Reconstructing 800 Years of Carbonate Ion Concentration in the Cariaco Basin Using the Area Density of Planktonic Foraminifera Shells by Davis, A. N., Davis, C. V., Thunell, R. C., Osborne, E. B., Black, D. E., Benitez‐Nelson, C. R.

“…Anthropogenically mediated ocean acidification (OA) has negative impacts on many marine organisms, especially calcifiers. However, systematic measurements of…”
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Decadal- to centennial-scale tropical Atlantic climate variability across a Dansgaard-Oeschger cycle by Hertzberg, J. E., Black, D. E., Peterson, L. C., Thunell, R. C., Haug, G. H.

“…The patterns and forcing mechanisms of climate variability on decadal to centennial time scales represent a major void in our current understanding of Earth's…”
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Glacial climate instability in the Northeast Pacific Ocean by Thunell, Robert C, Graham Mortyn, P

“…A study presents climate proxy records from sediment cores from the eastern margin of the North Pacific Ocean that indicate that climate in the region was…”
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Pliocene sapropels in the northern Adriatic area: chronology and paleoenvironmental significance by Rio, D., Channell, J.E.T., Bertoldi, R., Poli, M.S., Vergerio, P.P., Raffi, I., Sprovieri, R., Thunell, R.C.

“…A detailed stratigraphic and paleoenvironmental study was carried out ona marine section from the Marecchia Valley in the Northern Apennines. The section…”
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Chemoautotrophy in the Redox Transition Zone of the Cariaco Basin: A Significant Midwater Source of Organic Carbon Production by Taylor, Gordon T., Iabichella, Maria, Ho, Tung-Yuan, Scranton, Mary I., Thunell, Robert C., Muller-Karger, Frank, Varela, Ramon

“…During the CARIACO time series program, microbial standing stocks, bacterial production, and acetate turnover were consistently elevated in the redox…”
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Particle fluxes in a coastal upwelling zone: sediment trap results from Santa Barbara Basin, California by Thunell, Robert C.

“…Particle fluxes were measured in the center of Santa Barbara Basin on a bi-weekly basis for a three-year period beginning in August 1993. Lithogenic material…”
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Acetate Cycling in the Water Column of the Cariaco Basin: Seasonal and Vertical Variability and Implication for Carbon Cycling by Ho, Tung-Yuan, Scranton, Mary I., Taylor, Gordon T., Varela, Ramon, Thunell, Robert C., Muller-Karger, Frank

“…Acetate oxidation frequently has been used as proxy of organic carbon decomposition in marine anoxic sediments. However, the importance of acetate uptake in…”
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Increased northeast Pacific climatic variability during the warm middle Holocene by Friddell, Julie E., Thunell, Robert C., Guilderson, Thomas P., Kashgarian, Michaele

“…We use a pair of decadally resolved planktonic foraminiferal δ18O records from Santa Barbara Basin (SBB) to show that the warmest interval of the current…”
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Using species-specific paleotemperature equations with foraminifera: a case study in the Southern California Bight by Bemis, Bryan E., Spero, Howard J., Thunell, Robert C.

“…Species-specific paleotemperature equations were used to reconstruct a record of temperature from foraminiferal δ 18O values over the last 25 kyr in the…”
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Coccolithophore export production during the 1997–1998 El Niño event in Santa Barbara Basin (California) by De Bernardi, Bianca, Ziveri, Patrizia, Erba, Elisabetta, Thunell, Robert C.

“…The response of coccolithophore export production to non-El Niño and El Niño conditions was monitored during a two year period (26 March 1996–3 April 1998) in…”
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