Do glaciers tell a true atmospheric CO2 story?

Jaworowski, Zbigniew; Segalstad, Tom V.; Ono, Nobuyuki

doi:10.1016/0048-9697(92)90428-u

Cited by 37 publications

(14 citation statements)

References 98 publications

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“…The uncertainties concerning the reliability of the record increase with the age of the ice and the depth of recovery of the core, and it has been suggested that the long-term CO, record is an artifact caused by the structural changes of the ice with depth and by postcoring processes (8). The progressive caging of the air molecules inside the ice molecular structure (air hydrate formation) under the increasing load pressure with depth, or the occurence of fractures or cracks produced as a consequence of the drilling, may cause the composition of the extracted gas to differ from that of the air initially enclosed in the ice.…”

Section: Vol 259 12 February 1993mentioning

confidence: 99%

The Ice Record of Greenhouse Gases

Raynaud

Jouzel

Barnola

et al. 1993

Science

400

138

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Gases trapped in polar ice provide our most direct record of the changes in greenhouse gas levels during the past 150,000 years. The best documented trace-gas records are for CO 2 and CH 4 . The measurements corresponding to the industrial period document the recent changes in growth rate. The variability observed over the last 1000 years constrains the possible feedbacks of a climate change on the trace gases under similar conditions as exist today. Changes in the levels of greenhouse gases during the glacial-interglacial cycle overall paralleled, at least at high southern latitudes, changes in temperature; this relation suggests that greenhouse gases play an important role as an amplifier of the initial orbital forcing of Earth's climate and also helps to assess the feedbacks on the biogeochemical cycles in a climate system in which the components are changing at different rates.

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Section: Vol 259 12 February 1993mentioning

confidence: 99%

The Ice Record of Greenhouse Gases

Raynaud

Jouzel

Barnola

et al. 1993

Science

400

138

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“…Figure 13 indicates that CO 2 concentration in the atmosphere was not 292 ppm, as stated, but 335 ppm if all the data are considered (Slocum, 1955;Jaworowski et al, 1992). The same background concentration (332 ppm) for the pre-industrial period, is reported by Beck (2007) and Rutledge (2007).…”

Section: Measurements Of Atmospheric Co 2 Concentrations Proxy Measurmentioning

confidence: 59%

“…Currently, atmospheric CO 2 concentration measurements from Mauna Loa Observatory indicate that CO 2 concentrations increased from 315ppm to The same data after arbitrary shifting/correction of the air bubble age (Neftel et al, 1985;Friedli et al, 1986 (Jaworowski et al, 1992;Slocum, 1995). (Spencer, 2007) www.jbs.org/jbsnews-feed/4333-fifty-years-of-hot-air-.…”

Section: Measurements Of Atmospheric Co 2 Concentrations Proxy Measurmentioning

confidence: 99%

Climatic Changes: Anthropogenic Influence or Naturally Induced Phenomenon

Foscolos¹

2017

geosociety

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“…Despite the fact that the "greenhouse effect" hypothesis has still not been confirmed by reliably evi dence [2][3][4], the precautionary principle [5] gives grounds to consider this effect using the mathematical models of the biosphere-climate system [6][7][8][9][10]. This is due to the fact that positive feedback between the atmospheric CO 2 concentration, global temperature, and the biosphere parameters increases the risk of cat astrophic phenomena on the planetary scale [1].…”

mentioning

confidence: 99%