A model of the Earth's Dole effect

Georg Hoffmann; Matthias Cuntz; Christine Weber; Philippe Ciais; Pierre Friedlingstein; Martin Heimann; Jean Jouzel; Jörg Kaduk; Ernst Maier-Reimer; Ulrike Seibt; Katharina Six

doi:10.1029/2003gb002059

A model of the Earth's Dole effect

Georg Hoffmann
, Matthias Cuntz
, Christine Weber
, Philippe Ciais
, Pierre Friedlingstein
, Martin Heimann
, Jean Jouzel
, Jörg Kaduk
, Ernst Maier-Reimer
, Ulrike Seibt
, Katharina Six

Service d'Aéronomie
UVSQ
Max Planck Institute for Meteorology
Max Planck Institute for Biogeochemistry
University of Leicester

Research output: Contribution to journal › Article › peer-review

Abstract

The Earth's Dole effect describes the isotopic ¹⁸O/¹⁶O-enrichment of atmospheric oxygen with respect to ocean water, amounting under today's conditions to 23.5‰. We have developed a model of the Earth's Dole effect by combining the results of three-dimensional models of the oceanic and terrestrial carbon and oxygen cycles with results of atmospheric general circulation models (AGCMs) with built-in water isotope diagnostics. We obtain a range from 22.4‰ to 23.3‰ for the isotopic enrichment of atmospheric oxygen. We estimate a stronger contribution to the global Dole effect by the terrestrial relative to the marine biosphere in contrast to previous studies. This is primarily caused by a modeled high leaf water enrichment of 5-6‰. Leaf water enrichment rises by ∼1‰ to 6-7‰ when we use it to fit the observed 23.5‰ of the global Dole effect. The present model is designed to be utilized in forthcoming paleo studies allowing a quantitative analysis of long-term observations from polar ice cores.

Original language	English
Pages (from-to)	GB1008 1-15
Journal	Global Biogeochemical Cycles
Volume	18
Issue number	1
DOIs	https://doi.org/10.1029/2003gb002059
Publication status	Published - 1 Jan 2004
Externally published	Yes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 14 Life Below Water

Keywords

Carbon cycle
Dole effect
Water isotopes

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10.1029/2003gb002059

Cite this

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title = "A model of the Earth's Dole effect",

abstract = "The Earth's Dole effect describes the isotopic 18O/16O-enrichment of atmospheric oxygen with respect to ocean water, amounting under today's conditions to 23.5‰. We have developed a model of the Earth's Dole effect by combining the results of three-dimensional models of the oceanic and terrestrial carbon and oxygen cycles with results of atmospheric general circulation models (AGCMs) with built-in water isotope diagnostics. We obtain a range from 22.4‰ to 23.3‰ for the isotopic enrichment of atmospheric oxygen. We estimate a stronger contribution to the global Dole effect by the terrestrial relative to the marine biosphere in contrast to previous studies. This is primarily caused by a modeled high leaf water enrichment of 5-6‰. Leaf water enrichment rises by ∼1‰ to 6-7‰ when we use it to fit the observed 23.5‰ of the global Dole effect. The present model is designed to be utilized in forthcoming paleo studies allowing a quantitative analysis of long-term observations from polar ice cores.",

keywords = "Carbon cycle, Dole effect, Water isotopes",

author = "Georg Hoffmann and Matthias Cuntz and Christine Weber and Philippe Ciais and Pierre Friedlingstein and Martin Heimann and Jean Jouzel and J{\"o}rg Kaduk and Ernst Maier-Reimer and Ulrike Seibt and Katharina Six",

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AU - Hoffmann, Georg

AU - Cuntz, Matthias

AU - Weber, Christine

AU - Ciais, Philippe

AU - Friedlingstein, Pierre

AU - Heimann, Martin

AU - Jouzel, Jean

AU - Kaduk, Jörg

AU - Maier-Reimer, Ernst

AU - Seibt, Ulrike

AU - Six, Katharina

PY - 2004/1/1

Y1 - 2004/1/1

N2 - The Earth's Dole effect describes the isotopic 18O/16O-enrichment of atmospheric oxygen with respect to ocean water, amounting under today's conditions to 23.5‰. We have developed a model of the Earth's Dole effect by combining the results of three-dimensional models of the oceanic and terrestrial carbon and oxygen cycles with results of atmospheric general circulation models (AGCMs) with built-in water isotope diagnostics. We obtain a range from 22.4‰ to 23.3‰ for the isotopic enrichment of atmospheric oxygen. We estimate a stronger contribution to the global Dole effect by the terrestrial relative to the marine biosphere in contrast to previous studies. This is primarily caused by a modeled high leaf water enrichment of 5-6‰. Leaf water enrichment rises by ∼1‰ to 6-7‰ when we use it to fit the observed 23.5‰ of the global Dole effect. The present model is designed to be utilized in forthcoming paleo studies allowing a quantitative analysis of long-term observations from polar ice cores.

AB - The Earth's Dole effect describes the isotopic 18O/16O-enrichment of atmospheric oxygen with respect to ocean water, amounting under today's conditions to 23.5‰. We have developed a model of the Earth's Dole effect by combining the results of three-dimensional models of the oceanic and terrestrial carbon and oxygen cycles with results of atmospheric general circulation models (AGCMs) with built-in water isotope diagnostics. We obtain a range from 22.4‰ to 23.3‰ for the isotopic enrichment of atmospheric oxygen. We estimate a stronger contribution to the global Dole effect by the terrestrial relative to the marine biosphere in contrast to previous studies. This is primarily caused by a modeled high leaf water enrichment of 5-6‰. Leaf water enrichment rises by ∼1‰ to 6-7‰ when we use it to fit the observed 23.5‰ of the global Dole effect. The present model is designed to be utilized in forthcoming paleo studies allowing a quantitative analysis of long-term observations from polar ice cores.

KW - Carbon cycle

KW - Dole effect

KW - Water isotopes

UR - https://www.scopus.com/pages/publications/17744407246

U2 - 10.1029/2003gb002059

DO - 10.1029/2003gb002059

M3 - Article

AN - SCOPUS:17744407246

SN - 0886-6236

VL - 18

SP - GB1008 1-15

JO - Global Biogeochemical Cycles

JF - Global Biogeochemical Cycles

IS - 1

ER -

A model of the Earth's Dole effect

Abstract

UN SDGs

Keywords

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