UV-Spectral Luminescence Scanning: Technical Updates and Calibration Developments

Grove, Craig A.; Rodríguez-Ramírez, Alberto; Merschel, Gila; Tjallingii, Rik; Zinke, Jens; Macia, Adriano; Brummer, Geert-Jan A

doi:10.1007/978-94-017-9849-5_23

Cited by 5 publications

(3 citation statements)

References 28 publications

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“…Bleaching removes contaminants and increases the luminescence intensity (Nagtegaal et al, 2012). The cleaned section was photographed under UV light (excitation wavelength 365 nm) using spectral line scanning (SLS) on an Avaatech XRF scanner (Grove et al, 2010(Grove et al, , 2015Tanzil et al, 2016). The light source and camera are moved down the core as one unit scanning multiple lines that are stitched together to produce a continuous image.…”

Section: Coral Collection Age Model and Luminescence Measurementsmentioning

confidence: 99%

Coral Skeletal Luminescence Records Changes in Terrestrial Chromophoric Dissolved Organic Matter in Tropical Coastal Waters

Kaushal

Sanwlani

Tanzil

et al. 2021

Geophysical Research Letters

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The flux of terrigenous dissolved organic carbon (tDOC) from land to sea is quantitatively significant in the global carbon cycle, but the fate of tDOC in the ocean remains poorly known (Ciais et al., 2014;Cole et al., 2007). In some regions, a potentially large fraction of this tDOC flux can be oxidized to CO 2 through photodegradation and biodegradation processes, contributing to coastal ocean acidification and ultimately degassing to the atmosphere (Fichot et al., 2014;Semiletov et al., 2016;Ward et al., 2017). Moreover, tDOC is rich in chromophoric dissolved organic matter (CDOM), which is the fraction of dissolved organic matter

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Section: Coral Collection Age Model and Luminescence Measurementsmentioning

confidence: 99%

Coral Skeletal Luminescence Records Changes in Terrestrial Chromophoric Dissolved Organic Matter in Tropical Coastal Waters

Kaushal

Sanwlani

Tanzil

et al. 2021

Geophysical Research Letters

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“…Of the five colonies sampled, two were previously stained with Alizarin Red S on 6 April 2014 and were used to verify the timing of banding patterns in the coral skeleton. The coral cores were cut into ≈7 mm thick slices and soaked in a 3-7% sodium hypochlorite (NaOCl) solution for 24-48 h to remove coral tissue and other surficial organics [19], ultrasonic cleaned with milli-Q water, and then air-dried prior to analyses.…”

Section: Coral Sampling and Processingmentioning

confidence: 99%

Skeletal Growth Rates in Porites lutea Corals from Pulau Tinggi, Malaysia

Ong

Lee

Tanzil³

2021

Water

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Skeletal records of massive Porites lutea corals sampled from reefs around Malaysia have previously shown average decadal declines in growth rates associated with sea warming. However, there was a variability in growth declines between sites that warrant the need for investigations into more site-specific variations. This study analyzed decade-long (December 2004–November 2014) annual growth records (annual linear extension rate, skeletal bulk density, calcification rate) reconstructed from five massive P. lutea colonies from Pulau Tinggi, Malaysia. Significant non-linear changes in inter-annual trends of linear extension and calcification rates were found, with notable decreases that corresponded to the 2010 El Niño thermal stress episode and a pan-tropical mass coral bleaching event. Coral linear extension and calcification were observed to return to pre-2010 rates by 2012, suggesting the post-stress recovery of P. lutea corals at the study site within 2 years. Although no long-term declines in linear extension and calcification rates were detected, a linear decrease in annual skeletal bulk density by ≈9.5% over the 10-year study period was found. This suggests that although coral calcification rates are retained, the skeletal integrity of P. lutea corals may be compromised with potential implications for the strength of the overall reef carbonate framework. The correlation of coral calcification rates with sea surface temperature also demonstrated site-specific thermal threshold at 29 °C, which is comparable to the regional thermal threshold previously found for the Thai-Malay Peninsula.

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“…A ∼ 7 mm thick coral slab was obtained from a massive Porites sp. colony sampled from Kusu Island, Singapore (1°13′32″N, 103°51′35″E) and cleaned (mild oxidative treatment) for 24–48 h in a 1 : 5 mix of commercially available household bleach solution (NaOCl, 3–7% reactive chlorine) and water to remove surficial organic contaminants (Grove et al ). The coral slab was sonicated in deionized water for a total of 30 min (water changed every 10 min).…”

Section: Materials and Proceduresmentioning

confidence: 99%

Simultaneous analysis of Ba and Sr to Ca ratios in scleractinian corals by inductively coupled plasma optical emissions spectrometry

Cantarero

Tanzil

Goodkin

2016

Limnology & Ocean Methods

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Chemical analyses of coral skeletons are useful for reconstructing past ocean conditions. Simultaneous measurements of Ba and Sr to Ca ratios in coral samples have predominantly been achieved by inductively coupled plasma mass spectrometry (ICP-MS). We demonstrate a method that expands the application of the inductively coupled plasma optical emissions spectrometry (ICP-OES) technique to precisely analyze Ba, Sr, and Ca simultaneously. Analytical drift and matrix interferences at a range of Ba/Ca ratios (3-10 lmols/mol) were explored to determine the efficacy of standardized corrections. Minor disparity in drift and matrix interferences between standards of varying Ba/Ca ratios indicate that standardized corrections can be applied. Comparative analysis between ICP-OES and an established ICP-MS technique in a Singapore coral and international coral standard JCp-1 were utilized to validate the proposed ICP-OES technique. ICP-MS and ICP-OES techniques showed a consistent offset, which was correctible with the use of an internal lab standard and resulted in only minor differences between techniques. ICP-OES showed comparable accuracy and precision to the ICP-MS, as evaluated by analysis of JCp-1 which averaged values within one standard deviation of established concentrations (accurate to within 0.38 lmol Ba/mol Ca and 0.014 mmol Sr/mol Ca). We have demonstrated a sufficiently precise and accurate method for simultaneous analysis of Ba and Sr to Ca ratios in coral samples on an ICP-OES system. Expanding the application of ICP-OES in coral geochemical analysis provides a lower cost alternative to ICP-MS, while maintaining a high sample throughput.

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UV-Spectral Luminescence Scanning: Technical Updates and Calibration Developments

Cited by 5 publications

References 28 publications

Coral Skeletal Luminescence Records Changes in Terrestrial Chromophoric Dissolved Organic Matter in Tropical Coastal Waters

Coral Skeletal Luminescence Records Changes in Terrestrial Chromophoric Dissolved Organic Matter in Tropical Coastal Waters

Skeletal Growth Rates in Porites lutea Corals from Pulau Tinggi, Malaysia

Simultaneous analysis of Ba and Sr to Ca ratios in scleractinian corals by inductively coupled plasma optical emissions spectrometry

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