Johan C. Varekamp

Wesleyan University

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Ellen Thomas

Wesleyan University

Manfred J. van Bergen

Utrecht University

Christina Cauley

University of Oregon

M. S. Gilmore

Wesleyan University

Peter R. Buseck

Arizona State University

Pieter Z. Vroon

Vrije Universiteit Amsterdam

R.P.E. Poorter

Utrecht University

E. L. Mecray

NOAA National Centers for Environmental Information

Rob Kreulen

Utrecht University

Tristan Kading

University of Connecticut

Cooperative Institutions

United States Geological Survey

Wesleyan University

Utrecht University

Woods Hole Oceanographic Institution

Consejo Nacional de Investigaciones Científicas y Técnicas

Planetary Science Institute

University of Connecticut

Yale University

Harvard University

University of California, Berkeley

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Krakatau 1883: The Volcanic Eruption and Its Effects

Eos (1984)

Johan C. Varekamp

During the last couple of years, scientific and general interest in volcanos has surged as a result of the lively performance of Mt. St. Helens, and that's why Krakatau 1883 promises to become a good seller. What does it offer? The writers begin the volume with a detailed chronology of the eruptions, eyewitness accounts, and media coverage that cover local and regional effects, the tsunamis and their catastrophic results, and the sonic effects. Next is a section with translated parts of Verbeek's monumental monograph on the 1883 eruptions, followed by reprints of other scientific papers, and summaries of recent work on the event. For those deficient in French or Dutch, the translation of Verbeek's work will be especially welcome, because this civic engineer described and interpreted a colossal amount of data.

Chronology

10.1029/eo065i005p00034-01

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Citations (54)

The stable isotope geochemistry of volcanic lakes, with examples from Indonesia

Journal of Volcanology and Geothermal Research (2000)

Johan C. Varekamp Rob Kreulen

Crater lake

Equilibrium fractionation

Isotope Geochemistry

δ18O

δ34S

10.1016/s0377-0273(99)00175-4

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Citations (55)

Global mercury flux from volcanic and geothermal sources

Applied Geochemistry (1986)

Johan C. Varekamp Peter R. Buseck

Fumarole

Mercury

10.1016/0883-2927(86)90038-7

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Citations (141)

Jarosite Mineralization in St. Lucia, W.I.: Preliminary Geochemical, Spectral, and Biological Investigations of a Martian Analogue

36th Annual Lunar and Planetary Science Conference (2005)

J. P. Greenwood M. S. Gilmore Matthew D. Merrill Ruth E. Blake A. M. Martini

Jarosite

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Crater Lake Temperature Changes of the 2005 Eruption of Santa Ana Volcano, El Salvador, Central America

Birkhäuser Basel eBooks (2007)

Pedro A. Hernández Nemesio M. Pérez Johan C. Varekamp Benancio Henriquez Ángel Hernández

A sudden eruption at Santa Ana occurred on 1 October 2005, producing an ash-and-gas plume to a height in excess of 10 km above the volcano. Several days before, thermal infrared images of the crater provided precursory signals of the eruption. A significant increase in the extent and intensity of the fumarolic field inside the crater rim and of the surface temperature of the crater's lake was observed. Changes in energy input was also estimated to explain the increase in lake temperature based on energy/mass balance calculations.

Crater lake

Thermal infrared

Fumarole

10.1007/978-3-7643-8720-4_9

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Citations (2)

A STUDY OF THE GEOCHEMICAL AND GEOMORPHOLOGIC EVIDENCE FOR PREHISTORIC FLOODS FROM PAULINA LAKE IN NEWBERRY CRATER, CENTRAL OREGON

Abstracts with programs - Geological Society of America (2016)

Heather Upin Robert M. Newton Johan C. Varekamp

Crater lake

10.1130/abs/2016ne-272871

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Plagioclase-free Back-Arc Basalts from Caviahue, Argentina

AGUFM (2006)

A. Hesse Johan C. Varekamp

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The crater lake of Copahue volcano (Argentina): geochemical and thermal changes between 1995 and 2015

Geological Society London Special Publications (2016)

Mariano Agusto Alberto Caselli Romina Daga Johan C. Varekamp Alcira Trinelli

Abstract The crater lake and associated hydrothermal features of Copahue volcano have been studied intensively over the last 20 years (1995–2015). The geochemical and isotopic compositions of the waters provide insights into the processes occurring in the volcanic–hydrothermal system, the crater lake and the thermal springs. Variations in the temperature and chemical composition of the waters reveal fundamental changes in the system that precede and accompany the magmatic and phreatic eruptive events at Copahue. A conceptual model of the summit system was developed involving the intrusion of slivers of magma in the hot acidic hydrothermal cell, the saturation of waters with secondary minerals leading to reduced permeability, the blocking of fluid pathways by liquid sulphur during heating events and the transport of gas from the magma through the ductile–brittle transition into the hydrothermal system. Geophysical data were integrated with the chemical data to provide new insights into the behaviour of the deep magmatic system that feeds the volcano edifice. Multidisciplinary studies were used to identify precursory signals of eruptive activity to give an early warning of pending volcanic hazards. Several geochemical ratios in river water were identified as potential indicators of upcoming volcanic activity, which could be used in co-operation with the community and local authorities to deal with these volcanic hazards.

Crater lake

10.1144/sp437.16

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Citations (22)

Nitrogen Isotopic Ratio Records The Eutrophication History of Long Island Sound

AGU Spring Meeting Abstracts (2004)

Mark A. Altabet Johan C. Varekamp

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Mercury and Iodine systematics of volcanic arc fluids

AGUFM (2008)

Johan C. Varekamp Tristan Kading U. Fehn Zifeng Lü

Mercury

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