Index Catalog // ScholarsArchive@OSU

Interlaboratory comparison study of calibration standards for foraminiferal Mg/Ca thermometry

Creator:: Greaves, M., Caillon, N., Rebaubier, H., Bartoli, G., Boharty, S., Cacho, I., Clarke, L., Cooper, M., Daunt, C., Delaney, M., deMenocal, P., Dutton, A., Eggins, S., Elderfield, H., Garbe-Schoenberg, D., Goddard, E., Green, D., Groeneveld, J., Hastings, D., Hathorne, E., Kimoto, K., Klinkhammer, Gary P., Labeyrie, L., Lea, D. W., Marchitto, T., Martinez-Boti, M. A., Mortyn, P. G., Ni, Y., Nuernberg, D., Paradis, G., Pena, L., Quinn, T., Rosenthal, Y., Russell, A., Sagawa, T., Sosdian, S., L., Stott, Tachikawa, K., Tappa, E., Thunell, R., and Wilson, P. A.
Abstract:: An interlaboratory study of Mg/Ca and Sr/Ca ratios in three commercially available carbonate reference materials (BAM RS3, CMSI 1767, and ECRM 752-1) was performed with the participation of 25 laboratories that determine foraminiferal Mg/Ca ratios worldwide. These reference materials containing Mg/Ca in the range of foraminiferal calcite (0.8 mmol/mol to...
Resource Type:: Article
Full Text:: ; paleoceanography; carbonates. Index Terms: 4825 Oceanography: Biological and Chemical: Geochemistry; 4875

Evaluation of automated flow-through time-resolved analysis of foraminifera for Mg/Ca paleothermometry

Creator:: Klinkhammer, Gary P., Haley, Brian A., Mix, Alan C., Benway, H. M., and Cheseby, M.
Abstract:: The primary Mg/Ca ratio of foraminiferal shells is a potentially valuable paleoproxy for sea surface temperature (SST) reconstructions. However, the reliable extraction of this ratio from sedimentary calcite assumes that we can overcome artifacts related to foraminiferal ecology and partial dissolution, as well as contamination by secondary calcite and clay....
Resource Type:: Article
Full Text:: techniques; 4267 Oceanography: General: Paleoceanography; 4299 Oceanography: General: General or

Increased dissolved terrestrial input to the coastal ocean during the last deglaciation

Creator:: Klinkhammer, Gary P., Mix, Alan C., and Haley, B. A.
Abstract:: Here we present the first downcore results for a new paleoproxy, the Mn/Ca ratio of foraminiferal calcite, applied to sediment accumulated in the extreme Eastern Tropical North Pacific (ETNP) over the last 30,000 years. The Mn/Ca results are compared to oxygen isotopes and sea surface temperature calculated from Mg/Ca. We...
Resource Type:: Article
Full Text:: words, 6 figures, 1 table. Keywords: manganese; paleoproxy. Index Terms: 4924 Paleoceanography

Eastern Pacific Warm Pool paleosalinity and climate variability: 0–30 kyr

Creator:: Benway, Heather M., Mix, Alan C., Haley, Brian A., and Klinkhammer, Gary P.
Abstract:: Multiproxy geologic records of δ18O and Mg/Ca in fossil foraminifera from sediments under the Eastern Pacific Warm Pool (EPWP) region west of Central America document variations in upper ocean temperature, pycnocline strength, and salinity (i.e., net precipitation) over the past 30 kyr. Although evident in the paleotemperature record, there is...
Resource Type:: Article
Full Text:: paleosalinity and climate variability: 0–30 kyr, Paleoceanography, 21, PA3008, doi:10.1029/2005PA001208. 1

Evolution of the northeast Labrador Sea during the last interglaciation

Creator:: Winsor, Kelsey, Carlson, Anders E., Klinkhammer, Gary P., Stoner, Joseph S., and Hatfield, Robert G.
Abstract:: Boreal summer insolation during the last interglaciation (LIG) generally warmed the subpolar to polar Northern Hemisphere more than during the early Holocene, yet regional climate variations between the two periods remain. We investigate northeast Labrador Sea subsurface temperature and hydrography across terminations (T) I and II and during the LIG...
Resource Type:: Article
Full Text:: ; interglaciations; subpolar gyre. Index Terms: 4936 Paleoceanography: Interglacial; 4954 Paleoceanography: Sea

Evidence of a dissolution effect on benthic foraminiferal shell chemistry: δ¹³C, Cd/Ca, Ba/Ca, and Sr/Ca results from the Ontong Java Plateau

Creator:: McCorkle, Daniel C., Martin, Pamela A., Lea, David W., and Klinkhammer, Gary P.
Abstract:: Core-top benthic foraminifera (Cibicidoides wuellerstorfi) from a depth transect of Soutar box cores from the Ontong-Java Plateau (1.6 – 4.4 km) were analyzed for cadmium, barium, and strontium (Cd/Ca, Ba/Ca, and Sr/Ca) and for their stable isotopic composition (δ¹³C and δ¹⁸O). We also measure bottom water δ¹³C, Cd, and Ba...
Resource Type:: Article
Full Text:: Plateau PALEOCEANOGRAPHY, VOL. 10, NO. 4, PAGES 699-714, AUGUST 1995 Evidence of a dissolution effect

Is methane venting at the seafloor recorded by δ13C of benthic foraminifera shells?

Creator:: Torres, Marta E., Mix, Alan C., Kinports, K., Haley, Brian A., Klinkhammer, Gary P., McManus, James, and de Angelis, M. A.
Abstract:: The isotopic composition of the dissolved inorganic carbon (DIC) collected at sites of active methane discharge on Hydrate Ridge, Oregon, reveals anaerobic methane oxidation mediated by bacteria, with δ13CDIC reaching values as low as –48‰ in the upper 4 cm of the sediment. In spite of the high sulfide levels...
Resource Type:: Article
Full Text:: Oceanography: General: Paleoceanography; KEYWORDS: methane hydrates, gas seeps, foraminifera, carbon isotopes

KlinkhammerGaryCEOASLinking8.2KAEvent.pdf

Creator:: Hoffman, Jeremy S., Carlson, Anders E., Winsor, Kelsey, Klinkhammer, Gary P., LeGrande, Allegra N., Andrews, John T., and Strasser, Jeffrey C.
Abstract:: The 8.2 ka event was the last deglacial abrupt climate event. A reduction in the Atlantic meridional overturning circulation (AMOC) attributed to the drainage of glacial Lake Agassiz may have caused the event, but the freshwater signature of Lake Agassiz discharge has yet to be identified in δ¹⁸O of foraminiferal...
Full Text:: , Paleoceanography, 27, PA1205, doi:10.1029/2011PA002184. Condron, A., and P. A.Winsor (2011), A subtropical fate

Adaptation of a flow-through leaching procedure for Mg/Ca paleothermometry

Creator:: Benway, H. M., Haley, Brian A., Klinkhammer, Gary P., and Mix, Alan C.
Abstract:: Mg/Ca ratios in planktonic foraminifera reflect calcification temperatures and are thus useful for sea surface temperature (SST) reconstructions. Despite the obvious utility of this paleoceanographic tracer, problems of dissolution, gametogenic calcification, and contaminant phases have thus far limited confidence in Mg/Ca-based reconstructions. Here we show strong evidence of Mg heterogeneity...
Resource Type:: Article
Full Text:: Chemical: Geochemistry; 4267 Oceanography: General: Paleoceanography; 3030 Marine Geology and Geophysics

Geochemical proxies of North American freshwater routing during the Younger Dryas cold event

Creator:: Carlson, Anders E., Clark, Peter U., Haley, Brian A., Klinkhammer, Gary P., Simmons, Kathleen, Brook, Edward J., and Meissner, Katrin J.
Abstract:: The Younger Dryas cold interval represents a time when much of the Northern Hemisphere cooled from ≈12.9 to 11.5 kiloyears B.P. The cause of this event, which has long been viewed as the canonical example of abrupt climate change, was initially attributed to the routing of freshwater to the St....
Resource Type:: Article
Full Text:: –837. 3. Eltgroth SF, Adkins JF, Robinson LF, Southon J, Kashgarian M (2006) Paleoceanography 21

ScholarsArchive@OSU

Interlaboratory comparison study of calibration standards for foraminiferal Mg/Ca thermometry

Evaluation of automated flow-through time-resolved analysis of foraminifera for Mg/Ca paleothermometry

Increased dissolved terrestrial input to the coastal ocean during the last deglaciation

Eastern Pacific Warm Pool paleosalinity and climate variability: 0–30 kyr

Evolution of the northeast Labrador Sea during the last interglaciation

Evidence of a dissolution effect on benthic foraminiferal shell chemistry: δ¹³C, Cd/Ca, Ba/Ca, and Sr/Ca results from the Ontong Java Plateau

Is methane venting at the seafloor recorded by δ13C of benthic foraminifera shells?

KlinkhammerGaryCEOASLinking8.2KAEvent.pdf

Adaptation of a flow-through leaching procedure for Mg/Ca paleothermometry

Geochemical proxies of North American freshwater routing during the Younger Dryas cold event

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