Deccan volcanism, greenhouse warming, and the Cretaceous/Tertiary boundary

Kenneth G. Caldeira, Michael Rampino

Research output: Contribution to journalArticle

Abstract

A greenhouse wanning produced by increased emissions of mantle volatiles (CO2, SO2, HCI), particularly from the Deccan Traps flood basalt eruptions in India, has been suggested as a cause of the terminal Cretaceous extinctions. In order to quantify some of the possible climatological effects of an injection of volcanic volatiles into the oceanatmosphere system, we have developed a global biogeochemical carbon-cycle model that emphasizes the roles of ocean chemistry and the chemical weathering of terrestrial carbonate and silicate rocks. Model results indicate that Deccan Traps degassing would have produced variations in atmospheric CO2, leading to a sustained global wanning of less than 2 °C-too weak a climatic effect to be associated with mass extinctions. The calculated global wanning is at a rate two orders of magnitude slower and less than half the absolute amount experienced during the Holocene.

Original languageEnglish (US)
Pages (from-to)117-123
Number of pages7
JournalSpecial Paper of the Geological Society of America
Volume247
DOIs
StatePublished - 1990

Fingerprint

Deccan Traps
volcanism
warming
flood basalt
mass extinction
chemical weathering
degassing
carbon cycle
volcanic eruption
silicate
extinction
Holocene
Cretaceous
mantle
carbonate
ocean
rock
rate
climatic effect
effect

ASJC Scopus subject areas

  • Geology

Cite this

Deccan volcanism, greenhouse warming, and the Cretaceous/Tertiary boundary. / Caldeira, Kenneth G.; Rampino, Michael.

In: Special Paper of the Geological Society of America, Vol. 247, 1990, p. 117-123.

Research output: Contribution to journalArticle

@article{905fef566e83499eace520abc04496ef,
title = "Deccan volcanism, greenhouse warming, and the Cretaceous/Tertiary boundary",
abstract = "A greenhouse wanning produced by increased emissions of mantle volatiles (CO2, SO2, HCI), particularly from the Deccan Traps flood basalt eruptions in India, has been suggested as a cause of the terminal Cretaceous extinctions. In order to quantify some of the possible climatological effects of an injection of volcanic volatiles into the oceanatmosphere system, we have developed a global biogeochemical carbon-cycle model that emphasizes the roles of ocean chemistry and the chemical weathering of terrestrial carbonate and silicate rocks. Model results indicate that Deccan Traps degassing would have produced variations in atmospheric CO2, leading to a sustained global wanning of less than 2 °C-too weak a climatic effect to be associated with mass extinctions. The calculated global wanning is at a rate two orders of magnitude slower and less than half the absolute amount experienced during the Holocene.",
author = "Caldeira, {Kenneth G.} and Michael Rampino",
year = "1990",
doi = "10.1130/SPE247-p117",
language = "English (US)",
volume = "247",
pages = "117--123",
journal = "Special Paper of the Geological Society of America",
issn = "0072-1077",
publisher = "Geological Society of America",

}

TY - JOUR

T1 - Deccan volcanism, greenhouse warming, and the Cretaceous/Tertiary boundary

AU - Caldeira, Kenneth G.

AU - Rampino, Michael

PY - 1990

Y1 - 1990

N2 - A greenhouse wanning produced by increased emissions of mantle volatiles (CO2, SO2, HCI), particularly from the Deccan Traps flood basalt eruptions in India, has been suggested as a cause of the terminal Cretaceous extinctions. In order to quantify some of the possible climatological effects of an injection of volcanic volatiles into the oceanatmosphere system, we have developed a global biogeochemical carbon-cycle model that emphasizes the roles of ocean chemistry and the chemical weathering of terrestrial carbonate and silicate rocks. Model results indicate that Deccan Traps degassing would have produced variations in atmospheric CO2, leading to a sustained global wanning of less than 2 °C-too weak a climatic effect to be associated with mass extinctions. The calculated global wanning is at a rate two orders of magnitude slower and less than half the absolute amount experienced during the Holocene.

AB - A greenhouse wanning produced by increased emissions of mantle volatiles (CO2, SO2, HCI), particularly from the Deccan Traps flood basalt eruptions in India, has been suggested as a cause of the terminal Cretaceous extinctions. In order to quantify some of the possible climatological effects of an injection of volcanic volatiles into the oceanatmosphere system, we have developed a global biogeochemical carbon-cycle model that emphasizes the roles of ocean chemistry and the chemical weathering of terrestrial carbonate and silicate rocks. Model results indicate that Deccan Traps degassing would have produced variations in atmospheric CO2, leading to a sustained global wanning of less than 2 °C-too weak a climatic effect to be associated with mass extinctions. The calculated global wanning is at a rate two orders of magnitude slower and less than half the absolute amount experienced during the Holocene.

UR - http://www.scopus.com/inward/record.url?scp=0344532318&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0344532318&partnerID=8YFLogxK

U2 - 10.1130/SPE247-p117

DO - 10.1130/SPE247-p117

M3 - Article

VL - 247

SP - 117

EP - 123

JO - Special Paper of the Geological Society of America

JF - Special Paper of the Geological Society of America

SN - 0072-1077

ER -