Banca de DEFESA: MELINA DANIEL DE ANDRADE

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : MELINA DANIEL DE ANDRADE
DATA : 17/12/2019
HORA: 09:30
LOCAL: INSTITUTO DE FLORESTAS/DEPARTAMENTO DE CIÊNCIAS AMBIENTAIS
TÍTULO:

Evaluation of the MOD11A2 product for canopy temperature monitoring in the Brazilian Atlantic Forest

PALAVRAS-CHAVES:

Environmental satellite, Biophysical parameters, Conservation Unit. 

PÁGINAS: 49
GRANDE ÁREA: Ciências Agrárias
ÁREA: Recursos Florestais e Engenharia Florestal
SUBÁREA: Conservação da Natureza
ESPECIALIDADE: Recuperação de Areas Degradadas
RESUMO:

The forest canopies are responsible for a significant portion of gas and water vapor exchange between plant and atmosphere, having an important influence on global climate balance. The canopy temperature analysis  indicates the vegetation physiological behavior in relation to climatic variations. Remote sensing of Land Surface Temperature (LST), like the Moderate Resolution Imaging Spectroradiometer (MODIS) sensor products,  may be used to measure the canopy temperature on regional and global scale. However, uncertainties related to the accuracy of orbital data make the validation of these products an essential step in establishing their applicability.Therefore, this work aims to validate the MOD11A2 V006 product from canopy surface temperature data obtained by infrared radiation sensor installed in an Atlantic Forest area in Itatiaia National Park (PNI). For the validation of the MOD11A2 product, a comparative analysis between the LST data, obtained by the MODIS sensor, and the canopy temperature data, obtained by the SI-111 infrared radiation sensor coupled to the PNI Micrometeorological Tower, was performed. The evaluation was based on Pearson's correlation coefficient (r), bias (VM), root mean square error(RMSE), and Willmott's index of agreement (d). Meteorological variables and Land Surface Temperature collected from january to december 2018 in the PNI were also analyzed. The results show that the MOD11A2 product overestimates the canopy temperature in the daytime (VM ranging from 1.56°C to 3.57°C) and underestimates in the night time (VM ranging from -0.18°C to -4,22°C). During daytime, the months corresponding to the dry season presented a very high correlation (r = 0.74 and 0.86) and the highest values of the Willmott index of agreement (d = 0.70 and 0.64). At night time, the MOD11A2 product did not present a good perform for the TST estimation, especially in the rainy season, presenting a negative correlation and low agreement index from January to March (-0.51 and 0.11) and from October to December (-0.07 and 0.18). Therefore, it is possible to state that the MOD11A2 product has limitations to estimate the land surface temperature and that possible changes in the algorithm of this product can be performed for regions of high atmospheric humidity.

MEMBROS DA BANCA:
Presidente - 1872560 - RAFAEL COLL DELGADO
Interno - 1931586 - SADY JUNIOR MARTINS COSTA DE MENEZES
Externo à Instituição - RAFAEL DE ÁVILA RODRIGUES - UFG