Representation of the phosphorus cycle in the joint UK land environment simulator (vn5.5_JULES-CNP)

Most land surface models (LSMs), i.e. the land components of Earth system models (ESMs), include representation of nitrogen (N) limitation on ecosystem productivity. However, only a few of these models have incorporated phosphorus (P) cycling. In tropical ecosystems, this is likely to be important a...

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Main Authors: Nakhavali, Mahdi André, Mercado, Lina M., Hartley, Iain P., Sitch, Stephen, Cunha, Fernanda V., Di Ponzio, Raffaello, Lugli, Laynara F., Quesada, Carlos A., Andersen, Kelly M., Chadburn, Sarah E., Wiltshire, Andy J., Clark, Douglas B., Ribeiro, Gyovanni, Siebert, Lara, Moraes, Anna C. M., Rosa, Jéssica Schmeisk, Assis, Rafael, Camargo, José L.
Other Authors: Asian School of the Environment
Format: Article
Language:English
Published: 2022
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Online Access:https://hdl.handle.net/10356/163674
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1636742023-02-28T16:41:00Z Representation of the phosphorus cycle in the joint UK land environment simulator (vn5.5_JULES-CNP) Nakhavali, Mahdi André Mercado, Lina M. Hartley, Iain P. Sitch, Stephen Cunha, Fernanda V. Di Ponzio, Raffaello Lugli, Laynara F. Quesada, Carlos A. Andersen, Kelly M. Chadburn, Sarah E. Wiltshire, Andy J. Clark, Douglas B. Ribeiro, Gyovanni Siebert, Lara Moraes, Anna C. M. Rosa, Jéssica Schmeisk Assis, Rafael Camargo, José L. Asian School of the Environment Engineering::Environmental engineering Phosphorus Cycle Soil Fertility Most land surface models (LSMs), i.e. the land components of Earth system models (ESMs), include representation of nitrogen (N) limitation on ecosystem productivity. However, only a few of these models have incorporated phosphorus (P) cycling. In tropical ecosystems, this is likely to be important as N tends to be abundant, whereas the availability of rock-derived elements, such as P, can be very low. Thus, without a representation of P cycling, tropical forest response in areas such as Amazonia to rising atmospheric CO2 conditions remain highly uncertain. In this study, we introduced P dynamics and its interactions with the N and carbon (C) cycles into the Joint UK Land Environment Simulator (JULES). The new model (JULES-CNP) includes the representation of P stocks in vegetation and soil pools, as well as key processes controlling fluxes between these pools. We develop and evaluate JULES-CNP using in situ data collected at a low-fertility site in the central Amazon, with a soil P content representative of 60% of soils across the Amazon basin, to parameterize, calibrate, and evaluate JULES-CNP. Novel soil and plant P pool observations are used for parameterization and calibration, and the model is evaluated against C fluxes and stocks and those soil P pools not used for parameterization or calibration. We then evaluate the model at additional P-limited test sites across the Amazon and in Panama and Hawaii, showing a significant improvement over the C-and CN-only versions of the model. The model is then applied under elevated CO2 (600ppm) at our study site in the central Amazon to quantify the impact of P limitation on CO2 fertilization. We compare our results against the current state-of-the-art CNP models using the same methodology that was used in the AmazonFACE model intercomparison study. The model is able to reproduce the observed plant and soil P pools and fluxes used for evaluation under ambient CO2. We estimate P to limit net primary productivity (NPP) by 24% under current CO2 and by 46% under elevated CO2. Under elevated CO2, biomass in simulations accounting for CNP increase by 10% relative to contemporary CO2 conditions, although it is 5% lower compared to CN-and C-only simulations. Our results highlight the potential for high P limitation and therefore lower CO2 fertilization capacity in the Amazon rainforest with low-fertility soils. Published version This research has been supported by the Natural Environment Research Council (grant no. NE/LE007223/1) and the Newton Fund (Met Office Climate Science for Service Partnership Brazil (CSSP Brazil) grant). 2022-12-19T00:31:57Z 2022-12-19T00:31:57Z 2022 Journal Article Nakhavali, M. A., Mercado, L. M., Hartley, I. P., Sitch, S., Cunha, F. V., Di Ponzio, R., Lugli, L. F., Quesada, C. A., Andersen, K. M., Chadburn, S. E., Wiltshire, A. J., Clark, D. B., Ribeiro, G., Siebert, L., Moraes, A. C. M., Rosa, J. S., Assis, R. & Camargo, J. L. (2022). Representation of the phosphorus cycle in the joint UK land environment simulator (vn5.5_JULES-CNP). Geoscientific Model Development, 15(13), 5241-5269. https://dx.doi.org/10.5194/gmd-15-5241-2022 1991-959X https://hdl.handle.net/10356/163674 10.5194/gmd-15-5241-2022 2-s2.0-85134048074 13 15 5241 5269 en Geoscientific Model Development © Author(s) 2022. This work is distributed under the Creative Commons Attribution 4.0 License. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Environmental engineering
Phosphorus Cycle
Soil Fertility
spellingShingle Engineering::Environmental engineering
Phosphorus Cycle
Soil Fertility
Nakhavali, Mahdi André
Mercado, Lina M.
Hartley, Iain P.
Sitch, Stephen
Cunha, Fernanda V.
Di Ponzio, Raffaello
Lugli, Laynara F.
Quesada, Carlos A.
Andersen, Kelly M.
Chadburn, Sarah E.
Wiltshire, Andy J.
Clark, Douglas B.
Ribeiro, Gyovanni
Siebert, Lara
Moraes, Anna C. M.
Rosa, Jéssica Schmeisk
Assis, Rafael
Camargo, José L.
Representation of the phosphorus cycle in the joint UK land environment simulator (vn5.5_JULES-CNP)
description Most land surface models (LSMs), i.e. the land components of Earth system models (ESMs), include representation of nitrogen (N) limitation on ecosystem productivity. However, only a few of these models have incorporated phosphorus (P) cycling. In tropical ecosystems, this is likely to be important as N tends to be abundant, whereas the availability of rock-derived elements, such as P, can be very low. Thus, without a representation of P cycling, tropical forest response in areas such as Amazonia to rising atmospheric CO2 conditions remain highly uncertain. In this study, we introduced P dynamics and its interactions with the N and carbon (C) cycles into the Joint UK Land Environment Simulator (JULES). The new model (JULES-CNP) includes the representation of P stocks in vegetation and soil pools, as well as key processes controlling fluxes between these pools. We develop and evaluate JULES-CNP using in situ data collected at a low-fertility site in the central Amazon, with a soil P content representative of 60% of soils across the Amazon basin, to parameterize, calibrate, and evaluate JULES-CNP. Novel soil and plant P pool observations are used for parameterization and calibration, and the model is evaluated against C fluxes and stocks and those soil P pools not used for parameterization or calibration. We then evaluate the model at additional P-limited test sites across the Amazon and in Panama and Hawaii, showing a significant improvement over the C-and CN-only versions of the model. The model is then applied under elevated CO2 (600ppm) at our study site in the central Amazon to quantify the impact of P limitation on CO2 fertilization. We compare our results against the current state-of-the-art CNP models using the same methodology that was used in the AmazonFACE model intercomparison study. The model is able to reproduce the observed plant and soil P pools and fluxes used for evaluation under ambient CO2. We estimate P to limit net primary productivity (NPP) by 24% under current CO2 and by 46% under elevated CO2. Under elevated CO2, biomass in simulations accounting for CNP increase by 10% relative to contemporary CO2 conditions, although it is 5% lower compared to CN-and C-only simulations. Our results highlight the potential for high P limitation and therefore lower CO2 fertilization capacity in the Amazon rainforest with low-fertility soils.
author2 Asian School of the Environment
author_facet Asian School of the Environment
Nakhavali, Mahdi André
Mercado, Lina M.
Hartley, Iain P.
Sitch, Stephen
Cunha, Fernanda V.
Di Ponzio, Raffaello
Lugli, Laynara F.
Quesada, Carlos A.
Andersen, Kelly M.
Chadburn, Sarah E.
Wiltshire, Andy J.
Clark, Douglas B.
Ribeiro, Gyovanni
Siebert, Lara
Moraes, Anna C. M.
Rosa, Jéssica Schmeisk
Assis, Rafael
Camargo, José L.
format Article
author Nakhavali, Mahdi André
Mercado, Lina M.
Hartley, Iain P.
Sitch, Stephen
Cunha, Fernanda V.
Di Ponzio, Raffaello
Lugli, Laynara F.
Quesada, Carlos A.
Andersen, Kelly M.
Chadburn, Sarah E.
Wiltshire, Andy J.
Clark, Douglas B.
Ribeiro, Gyovanni
Siebert, Lara
Moraes, Anna C. M.
Rosa, Jéssica Schmeisk
Assis, Rafael
Camargo, José L.
author_sort Nakhavali, Mahdi André
title Representation of the phosphorus cycle in the joint UK land environment simulator (vn5.5_JULES-CNP)
title_short Representation of the phosphorus cycle in the joint UK land environment simulator (vn5.5_JULES-CNP)
title_full Representation of the phosphorus cycle in the joint UK land environment simulator (vn5.5_JULES-CNP)
title_fullStr Representation of the phosphorus cycle in the joint UK land environment simulator (vn5.5_JULES-CNP)
title_full_unstemmed Representation of the phosphorus cycle in the joint UK land environment simulator (vn5.5_JULES-CNP)
title_sort representation of the phosphorus cycle in the joint uk land environment simulator (vn5.5_jules-cnp)
publishDate 2022
url https://hdl.handle.net/10356/163674
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