Evaluación del producto MOD17A2H para representar la producción primaria bruta en la región pampeana
Keywords:
dióxido de carbono, imágenes satelitales, ecosistemasAbstract
En el contexto del cambio climático, comprender la dinámica del carbono y representar correctamente los intercambios que ocurren entre la biosfera y la atmósfera resulta de gran relevancia. La producción primaria bruta (GPP) representa la asimilación de dióxido de carbono realizada por los ecosistemas a través del proceso de fotosíntesis. En este trabajo se evalúa la eficacia del producto MOD17A2H de MODIS para estimar GPP en la región pampeana argentina, comparándolo con datos obtenidos mediante la técnica de covarianzas turbulentas (EC). Los resultados muestran que MODIS estima adecuadamente el GPP en algunos sitios naturales homogéneos, explicando hasta el 77% de la varianza sobre una marisma salada en la costa bonaerense. Sin embargo, en sitios agrícolas y heterogéneos, las estimaciones presentan mayores limitaciones. Las diferencias se deben a la limitada extensión horizontal de algunos lotes con cultivos y a deficiencias en la calibración utilizada en MODIS, que podría no representar adecuadamente a los ecosistemas de nuestra región. En conclusión, las estimaciones de GPP de MOD17A2H deben interpretarse con cautela, asegurando que la señal del ecosistema de interés se comprenda correctamente. Por otro lado, se resalta la importancia de contar con observaciones in situ adicionales que permitan caracterizar de forma precisa los biomas presentes en la región estudiada.
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Lasslop, G., Reichstein, M., Papale, D., Richardson, A. D., Arneth, A., Barr, A., & Wohlfahrt, G. (2010). Separation of net ecosystem exchange into assimilation and respiration using a light response curve approach: critical issues and global evaluation. Global Change Biology, 16(1), 187–208. https://doi.org/10.1111/j.1365-2486.2009.02041.x
Sakamoto, T., Gitelson, A. A., Wardlow, B. D., Verma, S. B., & Suyker, A. E. (2011). Estimating daily gross primary production of maize based only on MODIS WDRVI and shortwave radiation data. Remote Sensing of Environment, 115(12), 3091–3101. https://doi.org/10.1016/j.rse.2011.06.015
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Copyright (c) 2025 Rodrigo A. Merino, María Isabel Gassmann
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