Radiocarbon and geologic evidence reveal Ilopango volcano as source of the colossal ‘mystery’ eruption of 539/40 CE.

Dull, Robert A. , Southon, John R., Kutterolf, Steffen , Anchukaitis, Kevin J. , Freundt, Armin , Wahl, David B. , Sheets, Payson, Amaroli, Paul, Hernandez, Walter, Wiemann, Michael C. and Oppenheimer, Clive (2019) Radiocarbon and geologic evidence reveal Ilopango volcano as source of the colossal ‘mystery’ eruption of 539/40 CE. Quaternary Science Reviews . DOI 10.1016/j.quascirev.2019.07.037.

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Supplementary data:

Abstract

Highlights

• Major eruption of Ilopango volcano, El Salvador occurred in the first half of the 6th century.
• Ilopango eruption is consistent with ‘mystery’ eruption of 540 CE that caused global cooling.
• Magnitude 7 event ranks as one of the 10 largest on Earth in past 7000 years.
• Impacts on the Maya of Central America were severe, including estimated 100,000 + fatalities.

Abstract

Ilopango volcano (El Salvador) erupted violently during the Maya Classic Period (250–900 CE) in a densely-populated and intensively-cultivated region of the southern Maya realm, causing regional abandonment of an area covering more than 20,000 km2. However, neither the regional nor global impacts of the Tierra Blanca Joven (TBJ) eruption in Mesoamerica have been well appraised due to limitations in available volcanological, chronological, and archaeological observations. Here we present new evidence of the age, magnitude and sulfur release of the TBJ eruption, establishing it as one of the two hitherto unidentified volcanic triggers of a period of stratospheric aerosol loading that profoundly impacted Northern Hemisphere climate and society between circa 536 and 550 CE. Our chronology is derived from 100 new radiocarbon measurements performed on three subfossil tree trunks enveloped in proximal TBJ pyroclastic deposits. We also reassess the eruption magnitude using terrestrial (El Salvador, Guatemala, Honduras) and near-shore marine TBJ tephra deposit thickness measurements. Together, our new constraints on the age, eruption size (43.6 km3 Dense Rock Equivalent of magma, magnitude = 7.0) and sulfur yield (∼9–90 Tg), along with Ilopango's latitude (13.7° N), squarely frame the TBJ as the major climate-forcing eruption of 539 or 540 CE identified in bipolar ice cores and sourced to the tropics. In addition to deepening appreciation of the TBJ eruption's impacts in Mesoamerica, linking it to the major Northern Hemisphere climatic downturn of the mid-6th century CE offers another piece in the puzzle of understanding Eurasian history of the period.

Document Type: Article
Keywords: Holocene, Sixth century, Climate dynamics, Global, Central America, Tree rings, Volcanology, Radiocarbon, Maya, Classic period, Ilopango volcano (El Salvador)
Research affiliation: OceanRep > SFB 574 > C4
OceanRep > SFB 574
OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-MUHS Magmatic and Hydrothermal Systems
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1016/j.quascirev.2019.07.037
ISSN: 0277-3791
Related URLs:
Projects: SFB574
Date Deposited: 23 Aug 2019 11:42
Last Modified: 28 Aug 2019 07:02
URI: http://oceanrep.geomar.de/id/eprint/47558

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