Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/147908
Title: Coral skeletal luminescence records changes in terrestrial chromophoric dissolved organic matter in tropical coastal waters
Authors: Kaushal, Nikita
Sanwlani, Nivedita
Tanzil, Jani T. I.
Cherukuru, Nagur
Sahar, Syamil
Müller, Moritz
Mujahid, Aazani
Lee, Jen N.
Goodkin, Nathalie Fairbank
Martin, Patrick
Keywords: Science::Geology
Issue Date: 2021
Source: Kaushal, N., Sanwlani, N., Tanzil, J. T. I., Cherukuru, N., Sahar, S., Müller, M., Mujahid, A., Lee, J. N., Goodkin, N. F. & Martin, P. (2021). Coral skeletal luminescence records changes in terrestrial chromophoric dissolved organic matter in tropical coastal waters. Geophysical Research Letters, 48(8), e2020GL092130-. https://dx.doi.org/10.1029/2020GL092130
Project: Ministry of Education Singapore. Grant Number: RG123/18
National Research Foundation Singapore. Grant Number: NRF‐SCS‐ICFC2017‐01
National Research Foundation Singapore. Grant Number: NRFF‐2012‐03
Graduate Research Assistant. Grant Number: GL/F07/UMS/07/2017
Malaysia Fundamental Research Grant Scheme. Grant Number: FRGS/2/2013/STWN04/UMT/03/1
Journal: Geophysical Research Letters 
Abstract: Terrigenous dissolved organic matter (tDOM) carried by rivers represents an important carbon flux to the coastal ocean, which is thought to be increasing globally. Because tDOM is rich in light‐absorbent chromophoric dissolved organic matter (CDOM), it may also reduce the amount of sunlight available in coastal ecosystems. Despite its biogeochemical and ecological significance, there are few long‐term records of tDOM, hindering our understanding of its drivers and dynamics. Corals incorporate terrestrial humic acids, an important constituent of CDOM, resulting in luminescent bands that have been previously linked to rainfall and run‐off. We show that luminescence green‐to‐blue (G/B) ratios in a coral core growing in waters affected by peatland run‐off correlate strongly with remote sensing‐derived CDOM absorption. The 24‐year monthly‐resolution reconstructed record shows that rainfall controls land‐to‐ocean tDOM flux from this protected peatland catchment, and suggests an additional impact by solar radiation, which degrades tDOM at sea.
URI: https://hdl.handle.net/10356/147908
ISSN: 1944-8007
DOI: 10.1029/2020GL092130
DOI (Related Dataset): https://doi.org/10.21979/N9/5CZV22
Rights: © 2021 The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:ASE Journal Articles

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