Holocene peatland and ice-core data constraints on the timing and magnitude of CO2 emissions from past land use.
Saved in:
| Title: | Holocene peatland and ice-core data constraints on the timing and magnitude of CO |
|---|---|
| Authors: | Stocker, Benjamin David1,2,3 beni.stocker@env.ethz.ch, Zicheng Yu4, Massa, Charly5, Joos, Fortunat3,6 |
| Source: | Proceedings of the National Academy of Sciences of the United States of America. 2/14/2017, Vol. 114 Issue 7, p1492-1497. 6p. 2 Graphs. |
| Subjects: | Carbon dioxide mitigation, Anthropogenic soils, Peatlands, Population density, Desertification |
| Abstract: | CO2 emissions from preindustrial land-use change (LUC) are subject to large uncertainties. Although atmospheric CO2 records suggest only a small land carbon (C) source since 5,000 y before present (5 kyBP), the concurrent C sink by peat buildup could mask large early LUC emissions. Here, we combine updated continuous peat C reconstructions with the land C balance inferred from double deconvolution analyses of atmospheric CO2 and δ13C at different temporal scales to investigate the terrestrial C budget of the Holocene and the last millennium and constrain LUC emissions. LUC emissions are estimated with transient model simulations for diverging published scenarios of LU area change and shifting cultivation. Our results reveal a large terrestrial nonpeatland C source after the Mid-Holocene (66 ± 25 PgC at 7–5 kyBP and 115 ± 27 PgC at 5–3 kyBP). Despite high simulated per-capita CO2 emissions from LUC in early phases of agricultural development, humans emerge as a driver with dominant global C cycle impacts only in the most recent three millennia. Sole anthropogenic causes for particular variations in the CO2 record (∼20 ppm rise after 7 kyBP and ∼10 ppm fall between 1500 CE and 1600 CE) are not supported. This analysis puts a strong constraint on preindustrial vs. industrial-era LUC emissions and suggests that upper-end scenarios for the extent of agricultural expansion before 1850 CE are not compatible with the C budget thereafter. [ABSTRACT FROM AUTHOR] |
| Copyright of Proceedings of the National Academy of Sciences of the United States of America is the property of National Academy of Sciences and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
|---|---|
| Header | DbId: egs DbLabel: Engineering Source An: 121352228 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: Holocene peatland and ice-core data constraints on the timing and magnitude of CO<subscript>2</subscript> emissions from past land use. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Stocker%2C+Benjamin+David%22">Stocker, Benjamin David</searchLink><relatesTo>1,2,3</relatesTo><i> beni.stocker@env.ethz.ch</i><br /><searchLink fieldCode="AR" term="%22Zicheng+Yu%22">Zicheng Yu</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Massa%2C+Charly%22">Massa, Charly</searchLink><relatesTo>5</relatesTo><br /><searchLink fieldCode="AR" term="%22Joos%2C+Fortunat%22">Joos, Fortunat</searchLink><relatesTo>3,6</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Proceedings+of+the+National+Academy+of+Sciences+of+the+United+States+of+America%22">Proceedings of the National Academy of Sciences of the United States of America</searchLink>. 2/14/2017, Vol. 114 Issue 7, p1492-1497. 6p. 2 Graphs. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Carbon+dioxide+mitigation%22">Carbon dioxide mitigation</searchLink><br /><searchLink fieldCode="DE" term="%22Anthropogenic+soils%22">Anthropogenic soils</searchLink><br /><searchLink fieldCode="DE" term="%22Peatlands%22">Peatlands</searchLink><br /><searchLink fieldCode="DE" term="%22Population+density%22">Population density</searchLink><br /><searchLink fieldCode="DE" term="%22Desertification%22">Desertification</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: CO2 emissions from preindustrial land-use change (LUC) are subject to large uncertainties. Although atmospheric CO2 records suggest only a small land carbon (C) source since 5,000 y before present (5 kyBP), the concurrent C sink by peat buildup could mask large early LUC emissions. Here, we combine updated continuous peat C reconstructions with the land C balance inferred from double deconvolution analyses of atmospheric CO2 and δ13C at different temporal scales to investigate the terrestrial C budget of the Holocene and the last millennium and constrain LUC emissions. LUC emissions are estimated with transient model simulations for diverging published scenarios of LU area change and shifting cultivation. Our results reveal a large terrestrial nonpeatland C source after the Mid-Holocene (66 ± 25 PgC at 7–5 kyBP and 115 ± 27 PgC at 5–3 kyBP). Despite high simulated per-capita CO2 emissions from LUC in early phases of agricultural development, humans emerge as a driver with dominant global C cycle impacts only in the most recent three millennia. Sole anthropogenic causes for particular variations in the CO2 record (∼20 ppm rise after 7 kyBP and ∼10 ppm fall between 1500 CE and 1600 CE) are not supported. This analysis puts a strong constraint on preindustrial vs. industrial-era LUC emissions and suggests that upper-end scenarios for the extent of agricultural expansion before 1850 CE are not compatible with the C budget thereafter. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Proceedings of the National Academy of Sciences of the United States of America is the property of National Academy of Sciences and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=121352228 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1073/pnas.1613889114 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 6 StartPage: 1492 Subjects: – SubjectFull: Carbon dioxide mitigation Type: general – SubjectFull: Anthropogenic soils Type: general – SubjectFull: Peatlands Type: general – SubjectFull: Population density Type: general – SubjectFull: Desertification Type: general Titles: – TitleFull: Holocene peatland and ice-core data constraints on the timing and magnitude of CO2 emissions from past land use. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Stocker, Benjamin David – PersonEntity: Name: NameFull: Zicheng Yu – PersonEntity: Name: NameFull: Massa, Charly – PersonEntity: Name: NameFull: Joos, Fortunat IsPartOfRelationships: – BibEntity: Dates: – D: 14 M: 02 Text: 2/14/2017 Type: published Y: 2017 Identifiers: – Type: issn-print Value: 00278424 Numbering: – Type: volume Value: 114 – Type: issue Value: 7 Titles: – TitleFull: Proceedings of the National Academy of Sciences of the United States of America Type: main |
| ResultId | 1 |
