Corals at their latitudinal limits: laser ablation trace element systematics in Porites from Shirigai Bay, Japan

Fallon, Stewart; McCulloch, Malcolm T.; Woesik, Robert van; Sinclair, D. J.

doi:10.1016/s0012-821x(99)00200-9

Cited by 200 publications

(188 citation statements)

References 35 publications

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“…The overall analytical precision for Ba / Ca was 4.3 % (Fallon et al, 1999). Daily and long-term (5 month) reproducibility was monitored by repeated measurements of the pressed coral standard and an in-house coralline sponge standard (Fallon et al, 1999). The daily and long-term reproducibility was 1.6 % and 3.3 %, respectively.…”

Section: La-icp-msmentioning

confidence: 98%

“…Data were first smoothed using a 10 point running mean to reduce the influence of outliers, followed by a 10 point mean to reduce data volume. To determine accuracy, a NIST 614 glass standard and a pressed coral standard were used (Fallon et al, 1999(Fallon et al, , 2002. The overall analytical precision for Ba / Ca was 4.3 % (Fallon et al, 1999).…”

Section: La-icp-msmentioning

confidence: 99%

“…To determine accuracy, a NIST 614 glass standard and a pressed coral standard were used (Fallon et al, 1999(Fallon et al, , 2002. The overall analytical precision for Ba / Ca was 4.3 % (Fallon et al, 1999). Daily and long-term (5 month) reproducibility was monitored by repeated measurements of the pressed coral standard and an in-house coralline sponge standard (Fallon et al, 1999).…”

Section: La-icp-msmentioning

confidence: 99%

“…The daily and long-term reproducibility was 1.6 % and 3.3 %, respectively. The analytical internal precision for Ba / Ca was < 4.3 % RSD (Fallon et al, 1999). Further details on the methodology and standards are available in Fallon et al (1999Fallon et al ( , 2002 …”

Section: La-icp-msmentioning

confidence: 99%

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Spatial linkages between coral proxies of terrestrial runoff across a large embayment in Madagascar

et al. 2012

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Abstract. Coral cores provide vital climate reconstructions for site-specific temporal variability in river flow and sediment load. Yet, their ability to record spatial differences across multiple catchments is relatively unknown. Here, we investigate spatial linkages between four coral proxies of terrestrial runoff and their relationships between sites. Coral cores were drilled in and around Antongil Bay, the largest bay in Madagascar, and individually analysed for fifteen years of continuous luminescence (G / B), Ba / Ca, δ 18 O sw and δ 13 C data. Each coral core was drilled close to individual river mouths (≤ 7 km), and proxy data were compared to modelled river discharge and sediment runoff data for the three corresponding catchments. A reasonable agreement between terrestrial runoff proxies with modelled river discharge and sediment yield was observed. Some inconsistencies between proxy and modelled data are likely linked to proxy behaviour, watershed size and local environmental physiochemical parameters. In general, the further a coral resided from its river source, the weaker the proxy relationship was with modelled data and other corals, due to mixing gradients and currents. Nevertheless, we demonstrate that two coral Ba / Ca and luminescence (G / B) records influenced by the same watershed are reproducible. Furthermore, a strong Ba / Ca relationship was observed between two cores from distant watersheds, with baseline averages in agreement with modelled sediment runoff data. As humic acids behave conservatively in the water column, luminescence (G / B) data gave the highest regional correlations between cores, and showed the most consistent relationship with site specific modelled discharge. No statistical relationship was observed between cores in terms of interannual δ 18 O sw and δ 13 C, meaning corals were recording a localised signal at their respective sites, confounded by vital effects. Comparing proxy baseline averages and mean seasonal cycles provided a good overview of the runoff dynamics of the bay system.

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Section: La-icp-msmentioning

confidence: 98%

Section: La-icp-msmentioning

confidence: 99%

Section: La-icp-msmentioning

confidence: 99%

Section: La-icp-msmentioning

confidence: 99%

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Spatial linkages between coral proxies of terrestrial runoff across a large embayment in Madagascar

et al. 2012

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“…The incorporation of Mg into coral skeleton is controlled by varying factors. Mg can exist in the form of brucite in corals (Smith and Delong, 1978;Nothdurft et al, 2005) and Mg content in scleractinian corals varies between different genera and localities (Fallon et al, 1999). Nothdurft et al (2005) studied brucite in living scleractinian corals colonies (Acropora, Pocillopora, Porites) from subtidal and intertidal settings in the Great Barrier Reef, Australia, and subtidal Montastraea from the Florida Keys, United States.…”

Section: Introductionmentioning

confidence: 99%

Boron isotope fractionation during brucite deposition from artificial seawater

2011

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Abstract. Experiments involving boron incorporation into brucite (Mg(OH) 2 ) from magnesium-free artificial seawater with pH values ranging from 9.5 to 13.0 were carried out to better understand the incorporation behavior of boron into brucite and the influence of it on Mg/Ca-SST proxy and δ 11 B-pH proxy. The results show that both the concentration of boron in deposited brucite ([B] d ) and its boron partition coefficient (K d ) between deposited brucite and final seawater are controlled by the pH of the solution. The incorporation capacity of boron into brucite is almost the same as that into corals, but much stronger than that into oxides and clay minerals. The isotopic compositions of boron in deposited brucite (δ 11 B d ) are higher than those in the associated artificial seawater (δ 11 B isw ) with fractionation factors ranging between 1.0177 and 1.0569, resulting from the preferential incorporation of B(OH) 3 into brucite. Both boron adsorptions onto brucite and the precipitation reaction of H 3 BO 3 with brucite exist during deposition of brucite from artificial seawater. The simultaneous occurrence of both processes determines the boron concentration and isotopic fractionation of brucite. The isotopic fractionation behaviors and mechanisms of boron incorporated into brucite are different from those into corals. The existence of brucite in corals can affect the δ 11 B and Mg/Ca in corals and influences the Mg/Ca-SST proxy and δ 11 B-pH proxy negatively. The relationship between δ 11 B and Mg/Ca in corals can be used to judge the existence of brucite in corals, which should provide a reliable method for better use of δ 11 B and Mg/Ca in corals to reconstruct paleo-marine environment.

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Twentieth century warming of the tropical Atlantic captured by Sr‐U paleothermometry

et al. 2017

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Coral skeletons are valuable archives of past ocean conditions. However, interpretation of coral paleotemperature records is confounded by uncertainties associated with single‐element ratio thermometers, including Sr/Ca. A new approach, Sr‐U, uses U/Ca to constrain the influence of Rayleigh fractionation on Sr/Ca. Here we build on the initial Pacific Porites Sr‐U calibration to include multiple Atlantic and Pacific coral genera from multiple coral reef locations spanning a temperature range of 23.15–30.12°C. Accounting for the wintertime growth cessation of one Bermuda coral, we show that Sr‐U is strongly correlated with the average water temperature at each location (r2 = 0.91, P < 0.001, n = 19). We applied the multispecies spatial calibration between Sr‐U and temperature to reconstruct a 96 year long temperature record at Mona Island, Puerto Rico, using a coral not included in the calibration. Average Sr‐U derived temperature for the period 1900–1996 is within 0.12°C of the average instrumental temperature at this site and captures the twentieth century warming trend of 0.06°C per decade. Sr‐U also captures the timing of multiyear variability but with higher amplitude than implied by the instrumental data. Mean Sr‐U temperatures and patterns of multiyear variability were replicated in a second coral in the same grid box. Conversely, Sr/Ca records from the same two corals were inconsistent with each other and failed to capture absolute sea temperatures, timing of multiyear variability, or the twentieth century warming trend. Our results suggest that coral Sr‐U paleothermometry is a promising new tool for reconstruction of past ocean temperatures.

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Corals at their latitudinal limits: laser ablation trace element systematics in Porites from Shirigai Bay, Japan

Cited by 200 publications

References 35 publications

Spatial linkages between coral proxies of terrestrial runoff across a large embayment in Madagascar

Spatial linkages between coral proxies of terrestrial runoff across a large embayment in Madagascar

Boron isotope fractionation during brucite deposition from artificial seawater

Twentieth century warming of the tropical Atlantic captured by Sr‐U paleothermometry

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