Advanced search
1 file | 3.45 MB Add to list

Carbon and energy fluxes in cropland ecosystems : a model-data comparison

(2016) BIOGEOCHEMISTRY. 129(1). p.53-76
Author
Organization
Abstract
Croplands are highly productive ecosystems that contribute to land-atmosphere exchange of carbon, energy, and water during their short growing seasons. We evaluated and compared net ecosystem exchange (NEE), latent heat flux (LE), and sensible heat flux (H) simulated by a suite of ecosystem models at five agricultural eddy covariance flux tower sites in the central United States as part of the North American Carbon Program Site Synthesis project. Most of the models overestimated H and underestimated LE during the growing season, leading to overall higher Bowen ratios compared to the observations. Most models systematically under predicted NEE, especially at rain-fed sites. Certain crop-specific models that were developed considering the high productivity and associated physiological changes in specific crops better predicted the NEE and LE at both rain-fed and irrigated sites. Models with specific parameterization for different crops better simulated the inter-annual variability of NEE for maize-soybean rotation compared to those models with a single generic crop type. Stratification according to basic model formulation and phenological methodology did not explain significant variation in model performance across these sites and crops. The under prediction of NEE and LE and over prediction of H by most of the models suggests that models developed and parameterized for natural ecosystems cannot accurately predict the more robust physiology of highly bred and intensively managed crop ecosystems. When coupled in Earth System Models, it is likely that the excessive physiological stress simulated in many land surface component models leads to overestimation of temperature and atmospheric boundary layer depth, and underestimation of humidity and CO2 seasonal uptake over agricultural regions.
Keywords
Carbon and energy fluxes, Cropland ecosystems, Land-atmosphere exchange, Model-data comparison, Cropland carbon and energy exchange, RAIN-FED MAIZE, BIOSPHERE MODEL, VEGETATION DYNAMICS, DIOXIDE EXCHANGE, BALANCE CLOSURE, CLIMATE-CHANGE, WATER BUDGETS, CO2, FOREST, SOIL, cavelab

Downloads

  • (...).pdf
    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 3.45 MB

Citation

Please use this url to cite or link to this publication:

MLA
Lokupitiya, E., et al. “Carbon and Energy Fluxes in Cropland Ecosystems : A Model-Data Comparison.” BIOGEOCHEMISTRY, vol. 129, no. 1, 2016, pp. 53–76.
APA
Lokupitiya, E., Denning, A., Schaefer, K., Ricciuto, D., Anderson, R., Arain, M., … Xue, Y. (2016). Carbon and energy fluxes in cropland ecosystems : a model-data comparison. BIOGEOCHEMISTRY, 129(1), 53–76.
Chicago author-date
Lokupitiya, E, AS Denning, K Schaefer, D Ricciuto, R Anderson, MA Arain, I Baker, et al. 2016. “Carbon and Energy Fluxes in Cropland Ecosystems : A Model-Data Comparison.” BIOGEOCHEMISTRY 129 (1): 53–76.
Chicago author-date (all authors)
Lokupitiya, E, AS Denning, K Schaefer, D Ricciuto, R Anderson, MA Arain, I Baker, AG Barr, G Chen, JM Chen, P Ciais, DR Cook, M Dietze, M El Maayar, M Fischer, R Grant, D Hollinger, C Izaurralde, A Jain, C Kucharik, Z Li, S Liu, L Li, R Matamala, P Peylin, D Price, SW Running, A Sahoo, M Sprintsin, AE Suyker, H Tian, C Tonitto, M Torn, Hans Verbeeck, SB Verma, and Y Xue. 2016. “Carbon and Energy Fluxes in Cropland Ecosystems : A Model-Data Comparison.” BIOGEOCHEMISTRY 129 (1): 53–76.
Vancouver
1.
Lokupitiya E, Denning A, Schaefer K, Ricciuto D, Anderson R, Arain M, et al. Carbon and energy fluxes in cropland ecosystems : a model-data comparison. BIOGEOCHEMISTRY. 2016;129(1):53–76.
IEEE
[1]
E. Lokupitiya et al., “Carbon and energy fluxes in cropland ecosystems : a model-data comparison,” BIOGEOCHEMISTRY, vol. 129, no. 1, pp. 53–76, 2016.
@article{8054019,
  abstract     = {Croplands are highly productive ecosystems that contribute to land-atmosphere exchange of carbon, energy, and water during their short growing seasons. We evaluated and compared net ecosystem exchange (NEE), latent heat flux (LE), and sensible heat flux (H) simulated by a suite of ecosystem models at five agricultural eddy covariance flux tower sites in the central United States as part of the North American Carbon Program Site Synthesis project. Most of the models overestimated H and underestimated LE during the growing season, leading to overall higher Bowen ratios compared to the observations. Most models systematically under predicted NEE, especially at rain-fed sites. Certain crop-specific models that were developed considering the high productivity and associated physiological changes in specific crops better predicted the NEE and LE at both rain-fed and irrigated sites. Models with specific parameterization for different crops better simulated the inter-annual variability of NEE for maize-soybean rotation compared to those models with a single generic crop type. Stratification according to basic model formulation and phenological methodology did not explain significant variation in model performance across these sites and crops. The under prediction of NEE and LE and over prediction of H by most of the models suggests that models developed and parameterized for natural ecosystems cannot accurately predict the more robust physiology of highly bred and intensively managed crop ecosystems. When coupled in Earth System Models, it is likely that the excessive physiological stress simulated in many land surface component models leads to overestimation of temperature and atmospheric boundary layer depth, and underestimation of humidity and CO2 seasonal uptake over agricultural regions.},
  author       = {Lokupitiya, E and Denning, AS and Schaefer, K and Ricciuto, D and Anderson, R and Arain, MA and Baker, I and Barr, AG and Chen, G and Chen, JM and Ciais, P and Cook, DR and Dietze, M and El Maayar, M and Fischer, M and Grant, R and Hollinger, D and Izaurralde, C and Jain, A and Kucharik, C and Li, Z and Liu, S and Li, L and Matamala, R and Peylin, P and Price, D and Running, SW and Sahoo, A and Sprintsin, M and Suyker, AE and Tian, H and Tonitto, C and Torn, M and Verbeeck, Hans and Verma, SB and Xue, Y},
  issn         = {0168-2563},
  journal      = {BIOGEOCHEMISTRY},
  keywords     = {Carbon and energy fluxes,Cropland ecosystems,Land-atmosphere exchange,Model-data comparison,Cropland carbon and energy exchange,RAIN-FED MAIZE,BIOSPHERE MODEL,VEGETATION DYNAMICS,DIOXIDE EXCHANGE,BALANCE CLOSURE,CLIMATE-CHANGE,WATER BUDGETS,CO2,FOREST,SOIL,cavelab},
  language     = {eng},
  number       = {1},
  pages        = {53--76},
  title        = {Carbon and energy fluxes in cropland ecosystems : a model-data comparison},
  url          = {http://dx.doi.org/10.1007/s10533-016-0219-3},
  volume       = {129},
  year         = {2016},
}

Altmetric
View in Altmetric
Web of Science
Times cited: