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Understanding the uncertainty in global forest carbon turnover

Pugh, T. A. M.; Rademacher, T.; Shafer, S. L.; Steinkamp, J.; Barichivich, J.; Beckage, B.; Haverd, V.; Harper, A.; Heinke, J.; Nishina, K.; Rammig, A.; Sato, H.; Arneth, Almut; Hantson, S.; Hickler, T.; Kautz, M.; Quesada, B.; Smith, B.; Thonicke, K.

Abstract:
The length of time that carbon remains in forest biomass is one of the largest uncertainties in the global carbon cycle, with both recent historical baselines and future responses to environmental change poorly constrained by available observations. In the absence of large-scale observations, models used for global assessments tend to fall back on simplified assumptions of the turnover rates of biomass and soil carbon pools. In this study, the biomass carbon turnover times calculated by an ensemble of contemporary terrestrial biosphere models (TBMs) are analysed to assess their current capability to accurately estimate biomass carbon turnover times in forests and how these times are anticipated to change in the future. Modelled baseline 1985–2014 global average forest biomass turnover times vary from 12.2 to 23.5 years between TBMs. TBM differences in phenological processes, which control allocation to, and turnover rate of, leaves and fine roots, are as important as tree mortality with regard to explaining the variation in total turnover among TBMs. The different governing mechanisms exhibited by each TBM result in a wide range of plausible turnover time projections for the end of the century. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000123512
Veröffentlicht am 24.09.2020
Originalveröffentlichung
DOI: 10.5194/bg-17-3961-2020
Web of Science
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 05.08.2020
Sprache Englisch
Identifikator ISSN: 1726-4170, 1726-4189
KITopen-ID: 1000123512
HGF-Programm 12.02.02 (POF III, LK 01)
Vegetation climate- and land use system
Erschienen in Biogeosciences
Band 17
Heft 15
Seiten 3961-3989
Nachgewiesen in Scopus
Web of Science
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