Grain Yield Observations Constrain Cropland CO2 Fluxes Over Europe

M. Combe*, A.J.W. de Wit, J. Vilà-Guerau de arellano, M.K. van der Molen, V. Magliulo, W. Peters

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)

Abstract

Carbon exchange over croplands plays an important role in the European carbon cycle over daily to seasonal time scales. A better description of this exchange in terrestrial biosphere models-most of which currently treat crops as unmanaged grasslands-is needed to improve atmospheric CO2 simulations. In the framework we present here, we model gross European cropland CO2 fluxes with a crop growth model constrained by grain yield observations. Our approach follows a two-step procedure. In the first step, we calculate day-to-day crop carbon fluxes and pools with the WOrld FOod STudies (WOFOST) model. A scaling factor of crop growth is optimized regionally by minimizing the final grain carbon pool difference to crop yield observations from the Statistical Office of the European Union. In a second step, we re-run our WOFOST model for the full European 25 × 25 km gridded domain using the optimized scaling factors. We combine our optimized crop CO2 fluxes with a simple soil respiration model to obtain the net cropland CO2 exchange. We assess our model's ability to represent cropland CO2 exchange using 40 years of observations at seven European FluxNet sites and compare it with carbon fluxes produced by a typical terrestrial biosphere model. We conclude that our new model framework provides a more realistic and strongly observation-driven estimate of carbon exchange over European croplands. Its products will be made available to the scientific community through the ICOS Carbon Portal and serve as a new cropland component in the CarbonTracker Europe inverse model.
Original languageEnglish
Pages (from-to)3238-3259
JournalJournal of Geophysical Research: Biogeosciences
Volume122
Issue number12
Early online date18 Oct 2017
DOIs
Publication statusPublished - Dec 2017

Fingerprint

farmlands
grain yield
Fluxes
Carbon
Crops
crops
carbon
crop
crop growth
biosphere
carbon flux
food
cropland
Europe
carbon cycle
scaling
European Union
grasslands
crop models
soil respiration

Keywords

  • Carbon cycle
  • CO
  • Cropland
  • Inverse modeling
  • Net ecosystem exchange
  • Optimization

Cite this

@article{6e28acf2ef904f94be2f1fd6090cd4ca,
title = "Grain Yield Observations Constrain Cropland CO2 Fluxes Over Europe",
abstract = "Carbon exchange over croplands plays an important role in the European carbon cycle over daily to seasonal time scales. A better description of this exchange in terrestrial biosphere models-most of which currently treat crops as unmanaged grasslands-is needed to improve atmospheric CO2 simulations. In the framework we present here, we model gross European cropland CO2 fluxes with a crop growth model constrained by grain yield observations. Our approach follows a two-step procedure. In the first step, we calculate day-to-day crop carbon fluxes and pools with the WOrld FOod STudies (WOFOST) model. A scaling factor of crop growth is optimized regionally by minimizing the final grain carbon pool difference to crop yield observations from the Statistical Office of the European Union. In a second step, we re-run our WOFOST model for the full European 25 × 25 km gridded domain using the optimized scaling factors. We combine our optimized crop CO2 fluxes with a simple soil respiration model to obtain the net cropland CO2 exchange. We assess our model's ability to represent cropland CO2 exchange using 40 years of observations at seven European FluxNet sites and compare it with carbon fluxes produced by a typical terrestrial biosphere model. We conclude that our new model framework provides a more realistic and strongly observation-driven estimate of carbon exchange over European croplands. Its products will be made available to the scientific community through the ICOS Carbon Portal and serve as a new cropland component in the CarbonTracker Europe inverse model.",
keywords = "Carbon cycle, CO, Cropland, Inverse modeling, Net ecosystem exchange, Optimization",
author = "M. Combe and {de Wit}, A.J.W. and {Vil{\`a}-Guerau de arellano}, J. and {van der Molen}, M.K. and V. Magliulo and W. Peters",
year = "2017",
month = "12",
doi = "10.1002/2017JG003937",
language = "English",
volume = "122",
pages = "3238--3259",
journal = "Journal of Geophysical Research: Biogeosciences",
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Grain Yield Observations Constrain Cropland CO2 Fluxes Over Europe. / Combe, M.; de Wit, A.J.W.; Vilà-Guerau de arellano, J.; van der Molen, M.K.; Magliulo, V.; Peters, W.

In: Journal of Geophysical Research: Biogeosciences, Vol. 122, No. 12, 12.2017, p. 3238-3259.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Grain Yield Observations Constrain Cropland CO2 Fluxes Over Europe

AU - Combe, M.

AU - de Wit, A.J.W.

AU - Vilà-Guerau de arellano, J.

AU - van der Molen, M.K.

AU - Magliulo, V.

AU - Peters, W.

PY - 2017/12

Y1 - 2017/12

N2 - Carbon exchange over croplands plays an important role in the European carbon cycle over daily to seasonal time scales. A better description of this exchange in terrestrial biosphere models-most of which currently treat crops as unmanaged grasslands-is needed to improve atmospheric CO2 simulations. In the framework we present here, we model gross European cropland CO2 fluxes with a crop growth model constrained by grain yield observations. Our approach follows a two-step procedure. In the first step, we calculate day-to-day crop carbon fluxes and pools with the WOrld FOod STudies (WOFOST) model. A scaling factor of crop growth is optimized regionally by minimizing the final grain carbon pool difference to crop yield observations from the Statistical Office of the European Union. In a second step, we re-run our WOFOST model for the full European 25 × 25 km gridded domain using the optimized scaling factors. We combine our optimized crop CO2 fluxes with a simple soil respiration model to obtain the net cropland CO2 exchange. We assess our model's ability to represent cropland CO2 exchange using 40 years of observations at seven European FluxNet sites and compare it with carbon fluxes produced by a typical terrestrial biosphere model. We conclude that our new model framework provides a more realistic and strongly observation-driven estimate of carbon exchange over European croplands. Its products will be made available to the scientific community through the ICOS Carbon Portal and serve as a new cropland component in the CarbonTracker Europe inverse model.

AB - Carbon exchange over croplands plays an important role in the European carbon cycle over daily to seasonal time scales. A better description of this exchange in terrestrial biosphere models-most of which currently treat crops as unmanaged grasslands-is needed to improve atmospheric CO2 simulations. In the framework we present here, we model gross European cropland CO2 fluxes with a crop growth model constrained by grain yield observations. Our approach follows a two-step procedure. In the first step, we calculate day-to-day crop carbon fluxes and pools with the WOrld FOod STudies (WOFOST) model. A scaling factor of crop growth is optimized regionally by minimizing the final grain carbon pool difference to crop yield observations from the Statistical Office of the European Union. In a second step, we re-run our WOFOST model for the full European 25 × 25 km gridded domain using the optimized scaling factors. We combine our optimized crop CO2 fluxes with a simple soil respiration model to obtain the net cropland CO2 exchange. We assess our model's ability to represent cropland CO2 exchange using 40 years of observations at seven European FluxNet sites and compare it with carbon fluxes produced by a typical terrestrial biosphere model. We conclude that our new model framework provides a more realistic and strongly observation-driven estimate of carbon exchange over European croplands. Its products will be made available to the scientific community through the ICOS Carbon Portal and serve as a new cropland component in the CarbonTracker Europe inverse model.

KW - Carbon cycle

KW - CO

KW - Cropland

KW - Inverse modeling

KW - Net ecosystem exchange

KW - Optimization

U2 - 10.1002/2017JG003937

DO - 10.1002/2017JG003937

M3 - Article

VL - 122

SP - 3238

EP - 3259

JO - Journal of Geophysical Research: Biogeosciences

JF - Journal of Geophysical Research: Biogeosciences

SN - 2169-8953

IS - 12

ER -