Banca de QUALIFICAÇÃO: DANIEL ALVES JATI

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE : DANIEL ALVES JATI
DATA : 15/03/2019
HORA: 09:00
LOCAL: Auditório NTB
TÍTULO:

ESTIMATIVA DO FLUXO DE METANO (CH₄) EM ECOSSISTEMAS DE VÁRZEA NO TERRITÓRIO MUNICIPAL DE SANTARÉM - PARÁ: DESENVOLVIMENTO DO PLUGIN CH₄VA

PALAVRAS-CHAVES:

Greenhouse gas, Várzeas, Methane flux, Biogeophysical model

PÁGINAS: 61
GRANDE ÁREA: Outra
ÁREA: Ciências Ambientais
RESUMO:

The greenhouse effect is a natural phenomenon that has been intensified by human actions. This effect consists of the heating of the atmosphere due to the presence of gases that absorb radiation and release it into the environment in the form of heat transference. One of the main greenhouse gases is methane (CH4). This gas has a natural cycle, but its concentration in the atmosphere over the last decades increased due to anthropogenic actions. One of the main natural sources of CH4 are floodplains in the Amazon River basin. Understanding the dynamics of this gas in these ecosystems is important for better predictions of global warming nas climate change. The objective of this thesis is to estimate the methane flux in várzeas in Santarém, Pará, through the coupling of the CH4MODwetland biogeophysical model to the Geographic Information Systems (GIS) platform. For the coupling will be developed plugin that will make the connection between the mathematical models of the CH4MODwetland to the graphic interface GIS. To validate the model, monthly measurements of CH4 flux are being carried out in a floodplain forest in the district of Arapixuna. Partial results show that the predominant soil types in the Santarém floodplains are Eutrophic Flavic Neosol (28.25%) and Gleissolo Haplic ebutrophic (28.24%). The slopes of this region have a high slope, favoring the lateral movement of mass, a phenomenon known as “terras caídas”. Concerning the methane flux, partial results indicate that seasonality significantly influences the rate of methane emission into the atmosphere through vertical water movement. The average flow of the non-flooded period was 0.38 ± 4.43 𝜇 mol m⁻²h⁻¹, with coefficient of variation (cv) of 11.67. The average flow of the flooded period was 360.02 ± 175.62 𝜇 mol m⁻² h⁻¹ with cv = 0.49, an increase of 4,260.59% in relation to the maximum emission occurred in the non-flooded period. The net rate for the entire sample period was 179.759 ± 96.15 𝜇 mol m⁻² h⁻¹ with cv = 0.53. The work is underway, and the plugin development, floodplain delimitation, model coupling, calibration, validation and simulation will be performed in the next 24 months, as defined in the schedule.

MEMBROS DA BANCA:
Interno - 1963026 - ANDERSON ALVARENGA DE MOURA MENESES
Presidente - 1794276 - JOSE MAURO SOUSA DE MOURA
Interno - 1549120 - RODRIGO DA SILVA
Externo ao Programa - 1803366 - ROSEILSON SOUZA DO VALE