Pumice rafting and faunal dispersion during 2001–2002 in the Southwest Pacific: record of a dacitic submarine explosive eruption from Tonga

Bryan, Scott; Cook, Alex G.; Evans, Jason P.; Colls, Peter; Wells, Mathew G.; Lawrence, Michael G.; Jell, John S.; Greig, Alan; Leslie, R. A.

doi:10.1016/j.epsl.2004.08.009

Cited by 107 publications

(100 citation statements)

References 44 publications

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“…During this time, the fragments follow ocean currents, which suggests that tracking their progress might yield information on the speed and direction of these currents (Bryan et al 2004). The sediments formed once pumice fragments sink also have interesting features that have been noted by sedimentologists (Manville et al 1998).…”

Section: Introductionmentioning

confidence: 94%

The waterlogging of floating objects

Vella

Huppert

2007

J. Fluid Mech.

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We consider the dynamical processes by which a dense, porous object floating in a body of liquid becomes waterlogged and sinks. We first generalize the classic model of capillary rise in a porous medium to present an analytically tractable model of the process, which is valid for objects that are very shallow compared to their horizontal extent. We find an analytical expression for the time taken for the object to sink under this approximation. We use a series of boundary integral simulations to show that decreasing the horizontal extent of the object decreases the time taken to sink. We find that the results of these numerical simulations are in good quantitative agreement with a series of laboratory experiments. Finally, we discuss the implications of our work for pumice fragments, often found floating in open water after a volcanic eruption, occasionally even supporting plant, animal and human remains.

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Section: Introductionmentioning

confidence: 94%

The waterlogging of floating objects

Vella

Huppert

2007

J. Fluid Mech.

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“…Sea-rafted pumice can drift to the west and reach New Caledonia. Some of these rafts reached the Australian coast in October 2002, approximately 7-8 months after a submarine eruption in the Tonga Trench (Bryan et al, 2004). None of the slick observations corresponded to coral spawning which is responsible for fugitive coastal red waters once a year in New Caledonia.…”

Section: Field Observationsmentioning

confidence: 99%

An algorithm for detecting <i>Trichodesmium</i> surface blooms in the South Western Tropical Pacific

et al. 2011

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Abstract. Trichodesmium, a major colonial cyanobacterial nitrogen fixer, forms large blooms in NO 3 -depleted tropical oceans and enhances CO 2 sequestration by the ocean due to its ability to fix dissolved dinitrogen. Thus, its importance in C and N cycles requires better estimates of its distribution at basin to global scales. However, existing algorithms to detect them from satellite have not yet been successful in the South Western Tropical Pacific (SP). Here, a novel algorithm (TRICHOdesmium SATellite) based on radiance anomaly spectra (RAS) observed in SeaWiFS imagery, is used to detect Trichodesmium during the austral summertime in the SP (5 • S-25 • S 160 • E-170 • W). Selected pixels are characterized by a restricted range of parameters quantifying RAS spectra (e.g. slope, intercept, curvature). The fraction of valid (noncloudy) pixels identified as Trichodesmium surface blooms in the region is low (between 0.01 and 0.2 %

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“…Subaqueous eruptions can also lead to pumice rafts, which may persist in the ocean for weeks, months, or years (Simkin and Fiske 1983;Risso et al 2002;Bryan et al 2004). Even in today's modern era of enhanced ocean and atmospheric observation, such occurrences are surprises (BBC News, 10 Aug. 2012).…”

Section: Reviewmentioning

confidence: 99%

Geochemical approaches to the quantification of dispersed volcanic ash in marine sediment

Scudder

Murray

Schindlbeck

et al. 2016

Prog. in Earth and Planet. Sci.

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Volcanic ash has long been recognized in marine sediment, and given the prevalence of oceanic and continental arc volcanism around the globe in regard to widespread transport of ash, its presence is nearly ubiquitous. However, the presence/absence of very fine-grained ash material, and identification of its composition in particular, is challenging given its broad classification as an "aluminosilicate" component in sediment. Given this challenge, many studies of ash have focused on discrete layers (that is, layers of ash that are of millimeter-to-centimeter or greater thickness, and their respective glass shards) found in sequences at a variety of locations and timescales and how to link their presence with a number of Earth processes. The ash that has been mixed into the bulk sediment, known as dispersed ash, has been relatively unstudied, yet represents a large fraction of the total ash in a given sequence. The application of a combined geochemical and statistical technique has allowed identification of this dispersed ash as part of the original ash contribution to the sediment. In this paper, we summarize the development of these geochemical/statistical techniques and provide case studies from the quantification of dispersed ash in the Caribbean Sea, equatorial Pacific Ocean, and northwest Pacific Ocean. These geochemical studies (and their sedimentological precursors of smear slides) collectively demonstrate that local and regional arc-related ash can be an important component of sedimentary sequences throughout large regions of the ocean.

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Pumice rafting and faunal dispersion during 2001–2002 in the Southwest Pacific: record of a dacitic submarine explosive eruption from Tonga

Cited by 107 publications

References 44 publications

The waterlogging of floating objects

The waterlogging of floating objects

An algorithm for detecting <i>Trichodesmium</i> surface blooms in the South Western Tropical Pacific

Geochemical approaches to the quantification of dispersed volcanic ash in marine sediment

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Pumice rafting and faunal dispersion during 2001–2002 in the Southwest Pacific: record of a dacitic submarine explosive eruption from Tonga

Cited by 107 publications

References 44 publications

The waterlogging of floating objects

The waterlogging of floating objects

An algorithm for detecting &lt;i&gt;Trichodesmium&lt;/i&gt; surface blooms in the South Western Tropical Pacific

Geochemical approaches to the quantification of dispersed volcanic ash in marine sediment

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Product

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An algorithm for detecting <i>Trichodesmium</i> surface blooms in the South Western Tropical Pacific