Banca de DEFESA: RUBEN VIVALDI SILVA PESSOA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : RUBEN VIVALDI SILVA PESSOA
DATE: 16/01/2025
TIME: 09:00
LOCAL: https://meet.google.com/ghq-jcqg-sjn
TITLE:

CORRELATIONS BETWEEN TIME SERIES OF VEGETATIONS FIRES AND CLIMATE VARIABLES IN BRAZILIAN BIOMES

KEY WORDS:

Fire, Climate Variable, Biomes, Cross Correlation, DFA, DCCA.

PAGES: 69
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Agrometeorologia
SUMMARY:

Forest fires are complex phenomena, influenced by climatic factors, in addition to human interference. In Brazil, fires affect all biomes. Therefore, the study of these fires is necessary due to their negative effects, including not only environmental damage, but also greenhouse gas emissions and economic losses. In this scenario, understanding the temporal distribution of fires is challenging, due to the variation in their natural behavior. This study seeks to address this issue, using fractal techniques to analyze the long-term temporal and spatial correlations between fires and climate variables in Brazilian biomes during the period from 2002 to 2022. The results for the Amazon, Caatinga, Cerrado, and Atlantic Forest biomes showed that in the daily series of fire anomalies and climate variables (relative humidity, maximum temperature, rainfall, and wind speed), there are persistent long-range correlations, in which the persistence of fires was strongest in the Amazon biome and weakest in the Atlantic Forest. Climate variables are more persistent in the Caatinga biome and less persistent in the Atlantic Forest. Furthermore, persistent long-range cross-correlations were observed between the series of climate variables and fires in the four biomes. For the Amazon, Caatinga and Cerrado biomes, the DCCA correlation coefficient values indicated positive correlations between fires and the maximum temperature and wind speed variables, and negative correlations between fires and the relative humidity and rainfall variables. For the Atlantic Forest biome, the correlations between fires and the maximum temperature variable were positive and negative for the other climate variables.

COMMITTEE MEMBERS:
Externo à Instituição - IKARO DANIEL DE CARVALHO BARRETO
Interno - LUCIAN BOGDAN BEJAN
Interno - MOACYR CUNHA FILHO
Externo à Instituição - SILVIO FERNANDO ALVES XAVIER JUNIOR - UEPB
Presidente - TATIJANA STOSIC