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Using models to gui...
Using models to guide field experiments : a priori predictions for the CO2 response of a nutrient- and water-limited native Eucalypt woodland
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- Medlyn, Belinda E. (author)
- Western Sydney University,Macquarie University, Sydney
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- De Kauwe, Martin G. (author)
- Macquarie University, Sydney
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- Zaehle, Sönke (author)
- Max Planck Institute for Biogeochemistry
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- Walker, Anthony P. (author)
- Oak Ridge National Laboratory
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- Duursma, Remko A. (author)
- Western Sydney University
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- Luus, Kristina (author)
- Max Planck Institute for Biogeochemistry
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- Mishurov, Mikhail (author)
- Lund University,Lunds universitet,Institutionen för naturgeografi och ekosystemvetenskap,Naturvetenskapliga fakulteten,Dept of Physical Geography and Ecosystem Science,Faculty of Science
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- Pak, Bernard (author)
- Commonwealth Scientific and Industrial Research Organisation (CSIRO)
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- Smith, Benjamin (author)
- Lund University,Lunds universitet,Institutionen för naturgeografi och ekosystemvetenskap,Naturvetenskapliga fakulteten,Dept of Physical Geography and Ecosystem Science,Faculty of Science
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- Wang, Ying Ping (author)
- Commonwealth Scientific and Industrial Research Organisation (CSIRO)
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- Yang, Xiaojuan (author)
- Oak Ridge National Laboratory
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- Crous, Kristine Y. (author)
- Western Sydney University
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- Drake, John E. (author)
- Western Sydney University
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- Gimeno, Teresa E. (author)
- INRA National Institute of Agricultural Research,Western Sydney University
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- Macdonald, Catriona A. (author)
- Western Sydney University
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- Norby, Richard J. (author)
- Oak Ridge National Laboratory
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- Power, Sally A. (author)
- Western Sydney University
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- Tjoelker, Mark G. (author)
- Western Sydney University
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- Ellsworth, David S. (author)
- Western Sydney University
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(creator_code:org_t)
- 2016-05-09
- 2016
- English 18 s.
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In: Global Change Biology. - : Wiley. - 1354-1013 .- 1365-2486. ; 22:8, s. 2834-2851
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http://dx.doi.org/10...
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Abstract
Subject headings
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- The response of terrestrial ecosystems to rising atmospheric CO2 concentration (Ca), particularly under nutrient-limited conditions, is a major uncertainty in Earth System models. The Eucalyptus Free-Air CO2 Enrichment (EucFACE) experiment, recently established in a nutrient- and water-limited woodland presents a unique opportunity to address this uncertainty, but can best do so if key model uncertainties have been identified in advance. We applied seven vegetation models, which have previously been comprehensively assessed against earlier forest FACE experiments, to simulate a priori possible outcomes from EucFACE. Our goals were to provide quantitative projections against which to evaluate data as they are collected, and to identify key measurements that should be made in the experiment to allow discrimination among alternative model assumptions in a postexperiment model intercomparison. Simulated responses of annual net primary productivity (NPP) to elevated Ca ranged from 0.5 to 25% across models. The simulated reduction of NPP during a low-rainfall year also varied widely, from 24 to 70%. Key processes where assumptions caused disagreement among models included nutrient limitations to growth; feedbacks to nutrient uptake; autotrophic respiration; and the impact of low soil moisture availability on plant processes. Knowledge of the causes of variation among models is now guiding data collection in the experiment, with the expectation that the experimental data can optimally inform future model improvements.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Klimatforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Climate Research (hsv//eng)
Keyword
- carbon dioxide
- drought
- ecosystem model
- Eucalyptus tereticornis
- phosphorus
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Medlyn, Belinda ...
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De Kauwe, Martin ...
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Zaehle, Sönke
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Walker, Anthony ...
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Duursma, Remko A ...
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Luus, Kristina
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show more...
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Mishurov, Mikhai ...
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Pak, Bernard
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Smith, Benjamin
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Wang, Ying Ping
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Yang, Xiaojuan
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Crous, Kristine ...
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Drake, John E.
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Gimeno, Teresa E ...
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Macdonald, Catri ...
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Norby, Richard J ...
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Power, Sally A.
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Tjoelker, Mark G ...
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Ellsworth, David ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Climate Research
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Global Change Bi ...
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Lund University