Open AccessVariabilidad de la eficiencia en el uso del carbono a partir de datos MODIS
Author(s) -
M. Cañizares,
A. Moreno,
Sergio Sánchez-Ruíz,
María Amparo Gilabert
Publication year - 2017
Publication title -
revista de teledetección
Language(s) - English
Resource type - Journals
eISSN - 1988-8740
pISSN - 1133-0953
DOI - 10.4995/raet.2017.7044
Subject(s) - primary production , environmental science , precipitation , arid , ecosystem , vegetation (pathology) , biomass (ecology) , atmospheric sciences , correlation coefficient , physical geography , geography , ecology , meteorology , mathematics , biology , geology , statistics , medicine , pathology
Carbon use efficiency (CUE) describes how efficiently plants incorporate the carbon fixed during photosynthesis into biomass gain and can be calculated as the ratio between net primary production (NPP) and gross primary production (GPP). In this work, annual CUE has been obtained from annual GPP and NPP MODIS products for the peninsular Spain study area throughout eight years. CUE is spatially and temporally analyzed in terms of the vegetation type and annual precipitation and annual average air temperature. Results show that dense vegetation areas with moderate to high levels of precipitation present lower CUE values, whereas more arid areas present the highest CUE values. However, the temperature effect on the spatial variation of CUE is not well characterized. On the other hand, inter-annual variations of CUE of different ecosystems are discussed in terms of inter-annual variations of temperature and precipitation. It is shown that CUE exhibited a positive correlation with precipitation and a negative correlation with temperature in most ecosystems. Thus, CUE decreases when the ecosystem conditions change towards aridity