1. What are the contributions in this paper?
28 This study presents the first algal thallus ( skeleton ) archive of Asian Monsoon strength and Red Sea 29 influence in the Gulf of Aden.
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Elemental variability in the coralline alga Lithophyllum yemenense as an archive of past climate in the Gulf of Aden (NW Indian Ocean)
Annalisa Caragnano,Daniela Basso,David Storz,Dorrit E. Jacob,Dorrit E. Jacob,Federica Ragazzola,Francesca Benzoni,Eric Dutrieux +7 more
TL;DR: Algal Mg/Ca, Li/ Ca, and Ba/Ca showed strong and significant correlations with All Indian Rainfall in the decadal range indicating that these proxies can be useful for tracking variability in the Indian monsoon system.
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Abstract: This study presents the first algal thallus (skeleton) archive of Asian monsoon strength and Red Sea influence in the Gulf of Aden. Mg/Ca, Li/Ca, and Ba/Ca were measured in Lithophyllum yemenense from Balhaf (Gulf of Aden) using laser ablation inductively coupled plasma mass spectrometry, and Mg/Ca ratio oscillation was used to reconstruct the chronology (34 y). Oscillations of element rates corresponding to the algal growth between 1974 and 2008 were compared with recorded climate and oceanographic variability. During this period, sea surface temperatures (SST) in Balhaf recorded a warming trend of 0.55°C, corresponding to an increase in Mg and Li content in the algal thallus of 2.1 mol-% and 1.87 μmol-%, respectively. Lithophyllum yemenense recorded decadal SST variability by Li/Ca, and the influence of the Pacific El-Nino Southern Oscillation on the NW Indian Ocean climate system by Ba/Ca. Additionally, algal Mg/Ca, Li/Ca, and Ba/Ca showed strong and significant correlations with All Indian Rainfall in the decadal range indicating that these proxies can be useful for tracking variability in the Indian monsoon system, possibly due to changes of the surface wind system, with deep water upwelling in summer, and a distinct seasonality.
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Citations
Impact on environmental conditions and skeletal ultra-structure on the Li isotopic composition of scleractinian corals
Vigier N. Rollion-Bard,Anders Meibom,Dominique Blamart,Stéphanie Reynaud +3 more
- 01 Jun 2009
TL;DR: The lack of dependence on pH and pCO(2) and on skeletal ultrastructure indicates that the U isotopic signature of corals could be used as a proxy for reconstructing the paleo-delta Li-7 of seawater and, potentially, for deconvolving past continental weathering rates.
47
Reproducibility of Clathromorphum compactum coralline algal Mg/Ca ratios and comparison to high-resolution sea surface temperature data
Steffen Hetzinger,Steffen Hetzinger,Jochen Halfar,Andreas Kronz,Klaus Simon,Walter H. Adey,Robert S. Steneck +6 more
TL;DR: In this article, the results of laser ablation-inductively coupled plasma mass spectrometer (LA-ICP-MS) were compared to EPM data on the longest-lived specimens and were found statistically commensurable.
21
Influence of riverine input on the growth of Glycymeris glycymeris in the Bay of Brest, North-West France.
TL;DR: It was determined that inflow from the River Elorn, nitrite levels and salinity were the fundamental drivers of G. glycymeris growth and that these environmental parameters were all linked.
Structural and Elemental Analysis of the Freshwater, Low-Mg Calcite Coralline Alga Pneophyllum cetinaensis.
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- 24 Aug 2020
TL;DR: This study presents the first living low-Mg calcite coralline algae with Mg concentrations ten times lower than is common for the average marine species, which might be linked to different physical and chemical characteristics of the Cetina River.
10
Utility of Dendrochronology Crossdating Methods in the Development of Arctic Coralline Red Algae Clathromorphum compactum Growth Increment Chronology for Sea Ice Cover Reconstruction
Natasha Leclerc,Jochen Halfar,Trevor J. Porter,Bryan A. Black,Steffen Hetzinger,M A Zulian,Alexandra Tsay +6 more
TL;DR: In this article , the authors use tree-ring cross-dating techniques and COFECHA software to ensure and validate synchrony between C. compactum timeseries from three specimens collected near Beechey Island, Canada.
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