Temporal variability in chemical cycling of the subterranean estuary and associated chemical loading to the coastal ocean

Gonneea, Meagan Joan Eagle

doi:10.1575/1912/6292

Cited by 2 publications

(4 citation statements)

References 101 publications

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“…Slower‐growing (<5 mm/yr) Bermuda Diploria labyrinthiformis (BER‐DL‐003) and Orbicella franksi (BER‐OFR‐001) and Yucatan Siderastrea sideraea (Jardin C [ Gonneea , ]) were analyzed using laser ablation ICPMS. Sections of BER‐DL‐003 and BER‐OF‐001 had been previously mounted in a 25.4 mm diameter aluminum ring [ Cohen et al ., ; Cohen and Thorrold , ] and were reanalyzed here.…”

Section: Methodsmentioning

confidence: 99%

“…Sections of BER‐DL‐003 and BER‐OF‐001 had been previously mounted in a 25.4 mm diameter aluminum ring [ Cohen et al ., ; Cohen and Thorrold , ] and were reanalyzed here. A thin section of Jardin C was epoxy mounted on a glass slide [ Gonneea , ]. All samples were polished down to 0.3 µm alumina suspension.…”

Section: Methodsmentioning

confidence: 99%

“…Sr/Ca values were determined using a calibration curve of dissolved standards including JCp‐1, FEBS‐1, and NIES, bracketing every eight samples. U/Ca values were standardized to JCp‐1 [ Gonneea , ]. BER‐DL‐003 was also analyzed with 100 µm diameter spots, but they were spaced 250 µm apart and preablated at 6 Hz for 4 s, followed by elemental measurements made at 9 Hz over a 65 s dwell time.…”

Section: Methodsmentioning

confidence: 99%

“…OISST from Yucatan is in good agreement with average monthly SST recorded at a site within the Puerto Morelos lagoon [ Rodríguez‐Martínez et al ., ; Gonneea , ], and we used OISST to estimate temperature at the collection site.…”

Section: Methodsmentioning

confidence: 99%

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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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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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

et al. 2017

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Ba/Ca in foraminifera shells as a proxy of submarine groundwater discharge

Guo

Yuan

Burnett

et al. 2022

Limnol Oceanogr Letters

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Submarine groundwater discharge (SGD) can have a profound influence on marine environments and elemental biogeochemical cycles in coastal waters. We have explored the feasibility of using Ba/Ca ratios of benthic foraminiferal shells as a proxy of SGD. Dissolved barium (DBa) displayed enrichment behavior in bottom waters indicating that SGD is a major DBa source in the Changjiang (Yangtze) Estuary. Foraminifera that lived in bottom waters with elevated 222Rn activities (high SGD) showed a larger range of Ba/Ca ratios than those that lived under low bottom water 222Rn activities (low SGD). Our findings support the view that benthic foraminiferal Ba/Ca ratios could be treated as a qualitative proxy of SGD. We propose that in areas where SGD is the main source of DBa, foraminiferal Ba/Ca ratios could be applied for long‐term historical SGD records.

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Temporal variability in chemical cycling of the subterranean estuary and associated chemical loading to the coastal ocean

Cited by 2 publications

References 101 publications

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

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

Ba/Ca in foraminifera shells as a proxy of submarine groundwater discharge

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