Author Topic: Simulating agriculture in the Community Land Model version 5  (Read 35 times)

Pankaj Dey

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  • Institute : Indian Institute of Science
  • Programming language : MATLAB, R
While agricultural expansion and management practices are critical for increasing global food production, there is limited understanding of how they impact fluxes of carbon, water, and energy from the land surface to the atmosphere. Global land models are useful for understanding these possible climate impacts, yet few global land models explicitly represent crops or crop management given the complexity of interactions between human decisions, crop phenology, and land processes at global scales. Our analysis illustrates that representing specific crop types, as well as irrigation and fertilization, in the Community Land Model (CLM) increases the amount of carbon that plants draw out the atmosphere and also changes patterns of evapotranspiration. Additionally, crop yield estimates from CLM compare well to observed crop yields until ~1990, when modeled crop yields level off. This occurs because CLM does not represent management practices associated with modern agricultural intensification. Overall, our results illustrate the impact that crop expansion and management may have on climate and highlight that global models should represent specific crop types and crop management to accurately capture carbon, water, and energy fluxes from the land surface.      https://doi.org/10.1029/2019JG005529
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