Trends and land surface phenological responses to climate variability in the Argentina Pampas


  • B. Lara Universidad Nacional del Centro de la Provincia de Buenos Aires - Consejo Nacional de Investigaciones Científicas y Técnicas
  • M. Gandini Universidad Nacional del Centro de la Provincia de Buenos Aires (UNCPBA), Facultad de Agronomía, Laboratorio de Investigación y Servicios en Teledetección
  • P. Gantes Universidad Nacional de Luján (UNLu), Departamento de Ciencias Básicas, Instituto de Ecología y Desarrollo Sustentable (INEDES-CONICET)
  • S.D. Matteucci Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Grupo de Ecología de Paisajes y Medio Ambiente (GEPAMA), Universidad de Buenos Aires



climate variability, land surface phenology, MODIS, ENSO, carbon gains


Understanding the interaction between land surface and atmosphere processes is fundamental for predicting the effects of future climate change on ecosystem functioning and carbon dynamics. The objectives of this work were to analyze the trends in land surface phenology (LSP) metrics from remote sensing data, and to reveal their relationship with precipitation and ENSO phenomenon in the Argentina Pampas. Using a time series of MODIS Normalized Difference Vegetation Index (NDVI) data from 2000 to 2014, the start of the growing season (SOS), the annual integral of NDVI (i-NDVI, linear estimator of annual productivity), the timing of the annual maximum NDVI (t-MAX) and the annual relative range of NDVI (RREL, estimator of seasonality) were obtained for the Argentina Pampas. Then, spatial and temporal relationships with the Multivariate ENSO Index (MEI) and precipitation were analyzed. Results showed a negative trend in annual productivity over a 53.6% of the study area associated to natural and semi-natural grassland under cattle grazing, whereas a 40.3% of Argentina Pampas showed a significant positive trend in seasonality of carbon gains. The study also reveals that climate variability has a significant impact on land surface phenology in Argentina Pampas, although the impact is heterogeneous. SOS and t-MAX showed a significant negative correlation with the precipitation indicating an earlier occurrence. 23.6% and 28.4% of the study area showed a positive correlation of the annual productivity with MEI and precipitation, respectively, associated to rangelands (in the first case) and to both rangeland and croplands, in the second case. Climate variability did not explain the seasonal variability of phenology. The relationships found between LSP metrics and climate variability could be important for implementation of strategies for natural resource management.


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How to Cite

Lara B, Gandini M, Gantes P, Matteucci S. Trends and land surface phenological responses to climate variability in the Argentina Pampas. CIG [Internet]. 2020 Sep. 15 [cited 2023 May 28];46(2):581-602. Available from: