Synchrotron radiation applications to past volcanism archived in speleothems : An overview
Identifieur interne : 008A05 ( Main/Exploration ); précédent : 008A04; suivant : 008A06Synchrotron radiation applications to past volcanism archived in speleothems : An overview
Auteurs : Silvia Frisia [Australie] ; Andrea Borsato [Italie] ; Jean Susini [France]Source :
- Journal of volcanology and geothermal research [ 0377-0273 ] ; 2008.
Descripteurs français
- Pascal (Inist)
- Rayonnement synchrotron, Volcanisme, Spéléothème, Datation, Corrélation, Eruption, Variabilité climatique, Changement climatique, Glace, Carotte, Téphra, Grotte, Carbonate, Sulfate, Concentration, Détection, Résolution spatiale, Bruit, Fluorescence RX, Rayon X, Absorption, Interprétation, Stalagmite, Chronologie, Monde, Volcan Hekla.
- Wicri :
- topic : Changement climatique, Glace, Bruit, Interprétation.
English descriptors
- KwdEn :
- Hekla, X-ray fluorescence, X-rays, absorption, carbonates, caves, chronology, climate change, climate variability, concentration, correlation, dating, detection, drill cores, eruptions, global, ice, interpretation, noise, spatial resolution, speleothems, stalagmites, sulfates, synchrotron radiation, tephra, volcanism.
Abstract
Precise dating and correlation of past key volcanic eruptions over a wide geographic area in archives of past climate variability is necessary to support a direct causality between volcanism and climate changes. Research has mostly focused on ice cores and varved sediments, which capture a record of volcanic eruptions in geochemistry and the presence of tephra and criptotephra. Precisely dated cave carbonate deposits, collectively known as speleothems are other valuable palaeoclimate archives, and encode information on past volcanism in their sulphate concentration variability. Due to the physical characteristic of speleothems, detection of sulphate concentration variability requires techniques capable of high spatial resolution, very low limit of detection (ppm to ppb) and low background noise. Synchrotron radiation-based (SR) micro X-ray fluorescence (μXRF) and X-ray absorption near-edge spectrometry prove to be one of the most effective techniques to detect short-lived pulses of sulphate concentration increase, which may be interpreted as being related to atmospheric load due to volcanic eruptions. Here, we provide an overview of existing work as well as a novel interpretation of a SR μXRF-based sulphate series in an annually laminated stalagmite with robust chronology. Sulphate concentration peaks in the years 1815-1816,1844 and 1947, possibly coinciding with Tambora, Krakatau, and Hekla eruptions. It is concluded that sulphate concentration in speleothems expand the potential to correlate volcanic eruption events at a global scale.
Affiliations:
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nuts="2">Rhône-Alpes</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Journal of volcanology and geothermal research</title><title level="j" type="abbreviated">J. volcanol. geotherm. res.</title><idno type="ISSN">0377-0273</idno><imprint><date when="2008">2008</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal of volcanology and geothermal research</title><title level="j" type="abbreviated">J. volcanol. geotherm. res.</title><idno type="ISSN">0377-0273</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Hekla</term><term>X-ray fluorescence</term><term>X-rays</term><term>absorption</term><term>carbonates</term><term>caves</term><term>chronology</term><term>climate change</term><term>climate variability</term><term>concentration</term><term>correlation</term><term>dating</term><term>detection</term><term>drill cores</term><term>eruptions</term><term>global</term><term>ice</term><term>interpretation</term><term>noise</term><term>spatial resolution</term><term>speleothems</term><term>stalagmites</term><term>sulfates</term><term>synchrotron radiation</term><term>tephra</term><term>volcanism</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Rayonnement synchrotron</term><term>Volcanisme</term><term>Spéléothème</term><term>Datation</term><term>Corrélation</term><term>Eruption</term><term>Variabilité climatique</term><term>Changement climatique</term><term>Glace</term><term>Carotte</term><term>Téphra</term><term>Grotte</term><term>Carbonate</term><term>Sulfate</term><term>Concentration</term><term>Détection</term><term>Résolution spatiale</term><term>Bruit</term><term>Fluorescence RX</term><term>Rayon X</term><term>Absorption</term><term>Interprétation</term><term>Stalagmite</term><term>Chronologie</term><term>Monde</term><term>Volcan Hekla</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Changement climatique</term><term>Glace</term><term>Bruit</term><term>Interprétation</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Precise dating and correlation of past key volcanic eruptions over a wide geographic area in archives of past climate variability is necessary to support a direct causality between volcanism and climate changes. Research has mostly focused on ice cores and varved sediments, which capture a record of volcanic eruptions in geochemistry and the presence of tephra and criptotephra. Precisely dated cave carbonate deposits, collectively known as speleothems are other valuable palaeoclimate archives, and encode information on past volcanism in their sulphate concentration variability. Due to the physical characteristic of speleothems, detection of sulphate concentration variability requires techniques capable of high spatial resolution, very low limit of detection (ppm to ppb) and low background noise. Synchrotron radiation-based (SR) micro X-ray fluorescence (μXRF) and X-ray absorption near-edge spectrometry prove to be one of the most effective techniques to detect short-lived pulses of sulphate concentration increase, which may be interpreted as being related to atmospheric load due to volcanic eruptions. Here, we provide an overview of existing work as well as a novel interpretation of a SR μXRF-based sulphate series in an annually laminated stalagmite with robust chronology. Sulphate concentration peaks in the years 1815-1816,1844 and 1947, possibly coinciding with Tambora, Krakatau, and Hekla eruptions. It is concluded that sulphate concentration in speleothems expand the potential to correlate volcanic eruption events at a global scale.</div></front></TEI><affiliations><list><country><li>Australie</li><li>France</li><li>Italie</li></country><region><li>Auvergne-Rhône-Alpes</li><li>Rhône-Alpes</li></region><settlement><li>Grenoble</li></settlement></list><tree><country name="Australie"><noRegion><name sortKey="Frisia, Silvia" sort="Frisia, Silvia" uniqKey="Frisia S" first="Silvia" last="Frisia">Silvia Frisia</name></noRegion></country><country name="Italie"><noRegion><name sortKey="Borsato, Andrea" sort="Borsato, Andrea" uniqKey="Borsato A" first="Andrea" last="Borsato">Andrea Borsato</name></noRegion></country><country name="France"><region name="Auvergne-Rhône-Alpes"><name sortKey="Susini, Jean" sort="Susini, Jean" uniqKey="Susini J" first="Jean" last="Susini">Jean Susini</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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