A revised 1000 year atmospheric delta C-13-CO2 record from Law Dome and South Pole, Antarctica

Mauro Rubino; D.M. Etheridge; C.M. Trudinger; C.E. Allison; M.O Battle; R.L. Langenfelds; L.P. Steele; M. Bender; J.W.C. White; Theo Manuel Jenk; Thomas Blunier; R.J. Francey

doi:10.1002/jgrd.50668

A revised 1000 year atmospheric delta C-13-CO2 record from Law Dome and South Pole, Antarctica

Mauro Rubino, D.M. Etheridge, C.M. Trudinger, C.E. Allison, M.O Battle, R.L. Langenfelds, L.P. Steele, M. Bender, J.W.C. White, Theo Manuel Jenk, Thomas Blunier, R.J. Francey

Physics of Ice, Climate and Earth

122 Citations (Scopus)

Abstract

We present new measurements of δ¹³C of CO₂ extracted from a high-resolution ice core from Law Dome (East Antarctica), together with firn measurements performed at Law Dome and South Pole, covering the last 150 years. Our analysis is motivated by the need to better understand the role and feedback of the carbon (C) cycle in climate change, by advances in measurement methods, and by apparent anomalies when comparing ice core and firn air δ¹³C records from Law Dome and South Pole. We demonstrate improved consistency between Law Dome ice, South Pole firn, and the Cape Grim (Tasmania) atmospheric δ¹³C data, providing evidence that our new record reliably extends direct atmospheric measurements back in time. We also show a revised version of early δ¹³C measurements covering the last 1000 years, with a mean preindustrial level of -6.50‰. Finally, we use a Kalman Filter Double Deconvolution to infer net natural CO₂ fluxes between atmosphere, ocean, and land, which cause small δ¹³C deviations from the predominant anthropogenically induced δ¹³C decrease. The main features found from the previous δ¹³C record are confirmed, including the ocean as the dominant cause for the 1940 A.D. CO₂ leveling. Our new record provides a solid basis for future investigation of the causes of decadal to centennial variations of the preindustrial atmospheric CO₂ concentration. Those causes are of potential significance for predicting future CO₂ levels and when attempting atmospheric verification of recent and future global carbon emission mitigation measures through Coupled Climate Carbon Cycle Models. Key Points New and revised, firn and ice δ¹³C-CO₂ measurements from Antarctica Improve consistency between ice and firn δ¹³C-CO₂ measurements Net natural CO₂ fluxes between atmosphere, ocean and land inferred

Original language	English
Journal	Journal of Geophysical Research: Atmospheres
Volume	118
Issue number	15
Pages (from-to)	8482-8499
ISSN	2169-897X
DOIs	https://doi.org/10.1002/jgrd.50668
Publication status	Published - 16 Aug 2013

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Rubino, M., Etheridge, D. M., Trudinger, C. M., Allison, C. E., Battle, M. O., Langenfelds, R. L., Steele, L. P., Bender, M., White, J. W. C., Jenk, T. M., Blunier, T., & Francey, R. J. (2013). A revised 1000 year atmospheric delta C-13-CO2 record from Law Dome and South Pole, Antarctica. Journal of Geophysical Research: Atmospheres, 118(15), 8482-8499. https://doi.org/10.1002/jgrd.50668

Rubino, M, Etheridge, DM, Trudinger, CM, Allison, CE, Battle, MO, Langenfelds, RL, Steele, LP, Bender, M, White, JWC, Jenk, TM, Blunier, T & Francey, RJ 2013, 'A revised 1000 year atmospheric delta C-13-CO2 record from Law Dome and South Pole, Antarctica', Journal of Geophysical Research: Atmospheres, vol. 118, no. 15, pp. 8482-8499. https://doi.org/10.1002/jgrd.50668

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title = "A revised 1000 year atmospheric delta C-13-CO2 record from Law Dome and South Pole, Antarctica",

abstract = "We present new measurements of δ13C of CO2 extracted from a high-resolution ice core from Law Dome (East Antarctica), together with firn measurements performed at Law Dome and South Pole, covering the last 150 years. Our analysis is motivated by the need to better understand the role and feedback of the carbon (C) cycle in climate change, by advances in measurement methods, and by apparent anomalies when comparing ice core and firn air δ13C records from Law Dome and South Pole. We demonstrate improved consistency between Law Dome ice, South Pole firn, and the Cape Grim (Tasmania) atmospheric δ13C data, providing evidence that our new record reliably extends direct atmospheric measurements back in time. We also show a revised version of early δ13C measurements covering the last 1000 years, with a mean preindustrial level of -6.50‰. Finally, we use a Kalman Filter Double Deconvolution to infer net natural CO2 fluxes between atmosphere, ocean, and land, which cause small δ13C deviations from the predominant anthropogenically induced δ13C decrease. The main features found from the previous δ13C record are confirmed, including the ocean as the dominant cause for the 1940 A.D. CO2 leveling. Our new record provides a solid basis for future investigation of the causes of decadal to centennial variations of the preindustrial atmospheric CO2 concentration. Those causes are of potential significance for predicting future CO2 levels and when attempting atmospheric verification of recent and future global carbon emission mitigation measures through Coupled Climate Carbon Cycle Models. Key Points New and revised, firn and ice δ13C-CO2 measurements from Antarctica Improve consistency between ice and firn δ13C-CO2 measurements Net natural CO2 fluxes between atmosphere, ocean and land inferred",

author = "Mauro Rubino and D.M. Etheridge and C.M. Trudinger and C.E. Allison and M.O Battle and R.L. Langenfelds and L.P. Steele and M. Bender and J.W.C. White and Jenk, {Theo Manuel} and Thomas Blunier and R.J. Francey",

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T1 - A revised 1000 year atmospheric delta C-13-CO2 record from Law Dome and South Pole, Antarctica

AU - Rubino, Mauro

AU - Etheridge, D.M.

AU - Trudinger, C.M.

AU - Allison, C.E.

AU - Battle, M.O

AU - Langenfelds, R.L.

AU - Steele, L.P.

AU - Bender, M.

AU - White, J.W.C.

AU - Jenk, Theo Manuel

AU - Blunier, Thomas

AU - Francey, R.J.

PY - 2013/8/16

Y1 - 2013/8/16

N2 - We present new measurements of δ13C of CO2 extracted from a high-resolution ice core from Law Dome (East Antarctica), together with firn measurements performed at Law Dome and South Pole, covering the last 150 years. Our analysis is motivated by the need to better understand the role and feedback of the carbon (C) cycle in climate change, by advances in measurement methods, and by apparent anomalies when comparing ice core and firn air δ13C records from Law Dome and South Pole. We demonstrate improved consistency between Law Dome ice, South Pole firn, and the Cape Grim (Tasmania) atmospheric δ13C data, providing evidence that our new record reliably extends direct atmospheric measurements back in time. We also show a revised version of early δ13C measurements covering the last 1000 years, with a mean preindustrial level of -6.50‰. Finally, we use a Kalman Filter Double Deconvolution to infer net natural CO2 fluxes between atmosphere, ocean, and land, which cause small δ13C deviations from the predominant anthropogenically induced δ13C decrease. The main features found from the previous δ13C record are confirmed, including the ocean as the dominant cause for the 1940 A.D. CO2 leveling. Our new record provides a solid basis for future investigation of the causes of decadal to centennial variations of the preindustrial atmospheric CO2 concentration. Those causes are of potential significance for predicting future CO2 levels and when attempting atmospheric verification of recent and future global carbon emission mitigation measures through Coupled Climate Carbon Cycle Models. Key Points New and revised, firn and ice δ13C-CO2 measurements from Antarctica Improve consistency between ice and firn δ13C-CO2 measurements Net natural CO2 fluxes between atmosphere, ocean and land inferred

AB - We present new measurements of δ13C of CO2 extracted from a high-resolution ice core from Law Dome (East Antarctica), together with firn measurements performed at Law Dome and South Pole, covering the last 150 years. Our analysis is motivated by the need to better understand the role and feedback of the carbon (C) cycle in climate change, by advances in measurement methods, and by apparent anomalies when comparing ice core and firn air δ13C records from Law Dome and South Pole. We demonstrate improved consistency between Law Dome ice, South Pole firn, and the Cape Grim (Tasmania) atmospheric δ13C data, providing evidence that our new record reliably extends direct atmospheric measurements back in time. We also show a revised version of early δ13C measurements covering the last 1000 years, with a mean preindustrial level of -6.50‰. Finally, we use a Kalman Filter Double Deconvolution to infer net natural CO2 fluxes between atmosphere, ocean, and land, which cause small δ13C deviations from the predominant anthropogenically induced δ13C decrease. The main features found from the previous δ13C record are confirmed, including the ocean as the dominant cause for the 1940 A.D. CO2 leveling. Our new record provides a solid basis for future investigation of the causes of decadal to centennial variations of the preindustrial atmospheric CO2 concentration. Those causes are of potential significance for predicting future CO2 levels and when attempting atmospheric verification of recent and future global carbon emission mitigation measures through Coupled Climate Carbon Cycle Models. Key Points New and revised, firn and ice δ13C-CO2 measurements from Antarctica Improve consistency between ice and firn δ13C-CO2 measurements Net natural CO2 fluxes between atmosphere, ocean and land inferred

U2 - 10.1002/jgrd.50668

DO - 10.1002/jgrd.50668

M3 - Journal article

SN - 0148-0227

VL - 118

SP - 8482

EP - 8499

JO - Journal of Geophysical Research

JF - Journal of Geophysical Research

IS - 15

ER -

A revised 1000 year atmospheric delta C-13-CO2 record from Law Dome and South Pole, Antarctica

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