Carbon-phosphorus cycle models overestimate CO2enrichment response in a mature Eucalyptus forest
(2024) In Science Advances 10(27).- Abstract
The importance of phosphorus (P) in regulating ecosystem responses to climate change has fostered P-cycle implementation in land surface models, but their CO2 effects predictions have not been evaluated against measurements. Here, we perform a data-driven model evaluation where simulations of eight widely used P-enabled models were confronted with observations from a long-term free-air CO2 enrichment experiment in a mature, P-limited Eucalyptus forest. We show that most models predicted the correct sign and magnitude of the CO2 effect on ecosystem carbon (C) sequestration, but they generally overestimated the effects on plant C uptake and growth. We identify leaf-to- canopy scaling of photosynthesis, plant tissue stoichiometry, plant... (More)
The importance of phosphorus (P) in regulating ecosystem responses to climate change has fostered P-cycle implementation in land surface models, but their CO2 effects predictions have not been evaluated against measurements. Here, we perform a data-driven model evaluation where simulations of eight widely used P-enabled models were confronted with observations from a long-term free-air CO2 enrichment experiment in a mature, P-limited Eucalyptus forest. We show that most models predicted the correct sign and magnitude of the CO2 effect on ecosystem carbon (C) sequestration, but they generally overestimated the effects on plant C uptake and growth. We identify leaf-to- canopy scaling of photosynthesis, plant tissue stoichiometry, plant belowground C allocation, and the subsequent consequences for plant-microbial interaction as key areas in which models of ecosystem C-P interaction can be improved. Together, this data-model intercomparison reveals data-driven insights into the performance and functionality of P-enabled models and adds to the existing evidence that the global CO2-driven carbon sink is overestimated by models.
(Less)
- author
- organization
- publishing date
- 2024-07
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Science Advances
- volume
- 10
- issue
- 27
- article number
- adl5822
- publisher
- American Association for the Advancement of Science (AAAS)
- external identifiers
-
- pmid:38959317
- scopus:85197705574
- ISSN
- 2375-2548
- DOI
- 10.1126/sciadv.adl5822
- language
- English
- LU publication?
- yes
- id
- 1cf6bb9b-59f4-419e-80f0-185f69d0a1fe
- date added to LUP
- 2024-09-13 15:16:03
- date last changed
- 2024-09-13 15:16:52
@article{1cf6bb9b-59f4-419e-80f0-185f69d0a1fe, abstract = {{<p>The importance of phosphorus (P) in regulating ecosystem responses to climate change has fostered P-cycle implementation in land surface models, but their CO2 effects predictions have not been evaluated against measurements. Here, we perform a data-driven model evaluation where simulations of eight widely used P-enabled models were confronted with observations from a long-term free-air CO2 enrichment experiment in a mature, P-limited Eucalyptus forest. We show that most models predicted the correct sign and magnitude of the CO2 effect on ecosystem carbon (C) sequestration, but they generally overestimated the effects on plant C uptake and growth. We identify leaf-to- canopy scaling of photosynthesis, plant tissue stoichiometry, plant belowground C allocation, and the subsequent consequences for plant-microbial interaction as key areas in which models of ecosystem C-P interaction can be improved. Together, this data-model intercomparison reveals data-driven insights into the performance and functionality of P-enabled models and adds to the existing evidence that the global CO2-driven carbon sink is overestimated by models.</p>}}, author = {{Jiang, Mingkai and Medlyn, Belinda E. and Wårlind, David and Knauer, Jürgen and Fleischer, Katrin and Goll, Daniel S. and Olin, Stefan and Yang, Xiaojuan and Yu, Lin and Zaehle, Sönke and Zhang, Haicheng and Lv, He and Crous, Kristine Y. and Carrillo, Yolima and Macdonald, Catriona and Anderson, Ian and Boer, Matthias M. and Farrell, Mark and Gherlenda, Andrew and Castañeda-Gómez, Laura and Hasegawa, Shun and Jarosch, Klaus and Milham, Paul and Ochoa-Hueso, Raúl and Pathare, Varsha and Pihlblad, Johanna and Nevado, Juan Piñeiro and Powell, Jeff and Power, Sally A. and Reich, Peter and Riegler, Markus and Ellsworth, David S. and Smith, Benjamin}}, issn = {{2375-2548}}, language = {{eng}}, number = {{27}}, publisher = {{American Association for the Advancement of Science (AAAS)}}, series = {{Science Advances}}, title = {{Carbon-phosphorus cycle models overestimate CO<sub>2</sub>enrichment response in a mature Eucalyptus forest}}, url = {{http://dx.doi.org/10.1126/sciadv.adl5822}}, doi = {{10.1126/sciadv.adl5822}}, volume = {{10}}, year = {{2024}}, }