Accelerating rates of arctic carbon cycling revealed by long-term atmospheric CO2 measurements

Su Jong Jeong, A. Anthony Bloom, David Schimel, Colm Sweeney, Nicholas C. Parazoo, David Medvigy, Gabriela Schaepman-Strub, Chunmiao Zheng, Christopher R Schwalm, Deborah N Huntzinger, Anna M. Michalak, Charles E. Miller

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The contemporary Arctic carbon balance is uncertain, and the potential for a permafrost carbon feedback of anywhere from 50 to 200 petagrams of carbon (Schuur et al., 2015) compromises accurate 21st-century global climate system projections. The 42-year record of atmospheric CO2 measurements at Barrow, Alaska (71.29 N, 156.79 W), reveals significant trends in regional land-surface CO2 anomalies (DCO2), indicating long-term changes in seasonal carbon uptake and respiration. Using a carbon balance model constrained by DCO2, we find a 13.4% decrease in mean carbon residence time (50% confidence range = 9.2 to 17.6%) in North Slope tundra ecosystems during the past four decades, suggesting a transition toward a boreal carbon cycling regime. Temperature dependencies of respiration and carbon uptake suggest that increases in cold season Arctic labile carbon release will likely continue to exceed increases in net growing season carbon uptake under continued warming trends.

Original languageEnglish (US)
Article numbereaao1167
JournalScience advances
Volume4
Issue number7
DOIs
StatePublished - Jul 11 2018

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carbon
carbon balance
respiration
rate
twenty first century
long-term change
tundra
permafrost
global climate
land surface
residence time
growing season
warming
anomaly
ecosystem
temperature
trend

ASJC Scopus subject areas

  • General

Cite this

Jeong, S. J., Bloom, A. A., Schimel, D., Sweeney, C., Parazoo, N. C., Medvigy, D., ... Miller, C. E. (2018). Accelerating rates of arctic carbon cycling revealed by long-term atmospheric CO2 measurements. Science advances, 4(7), [eaao1167]. https://doi.org/10.1126/sciadv.aao1167

Accelerating rates of arctic carbon cycling revealed by long-term atmospheric CO2 measurements. / Jeong, Su Jong; Bloom, A. Anthony; Schimel, David; Sweeney, Colm; Parazoo, Nicholas C.; Medvigy, David; Schaepman-Strub, Gabriela; Zheng, Chunmiao; Schwalm, Christopher R; Huntzinger, Deborah N; Michalak, Anna M.; Miller, Charles E.

In: Science advances, Vol. 4, No. 7, eaao1167, 11.07.2018.

Research output: Contribution to journalArticle

Jeong, SJ, Bloom, AA, Schimel, D, Sweeney, C, Parazoo, NC, Medvigy, D, Schaepman-Strub, G, Zheng, C, Schwalm, CR, Huntzinger, DN, Michalak, AM & Miller, CE 2018, 'Accelerating rates of arctic carbon cycling revealed by long-term atmospheric CO2 measurements' Science advances, vol. 4, no. 7, eaao1167. https://doi.org/10.1126/sciadv.aao1167
Jeong SJ, Bloom AA, Schimel D, Sweeney C, Parazoo NC, Medvigy D et al. Accelerating rates of arctic carbon cycling revealed by long-term atmospheric CO2 measurements. Science advances. 2018 Jul 11;4(7). eaao1167. https://doi.org/10.1126/sciadv.aao1167
Jeong, Su Jong ; Bloom, A. Anthony ; Schimel, David ; Sweeney, Colm ; Parazoo, Nicholas C. ; Medvigy, David ; Schaepman-Strub, Gabriela ; Zheng, Chunmiao ; Schwalm, Christopher R ; Huntzinger, Deborah N ; Michalak, Anna M. ; Miller, Charles E. / Accelerating rates of arctic carbon cycling revealed by long-term atmospheric CO2 measurements. In: Science advances. 2018 ; Vol. 4, No. 7.
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