Banca de DEFESA: MAILSON PEREIRA ALVES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : MAILSON PEREIRA ALVES
DATE: 07/08/2023
TIME: 09:00
LOCAL: videoconferência
TITLE:

Diurnal and Seasonal Variations in Carbon, Water and Energy Exchanges in a Primary Forest in the Amazon – Brazil

KEY WORDS:

carbon balance, eddy covariance, gross primary production, índice de vegetação normalizado

PAGES: 16
BIG AREA: Ciências Exatas e da Terra
AREA: Geociências
SUBÁREA: Meteorologia
SPECIALTY: Micrometeorologia
SUMMARY:

Carbon exchange in forested areas, quantified by Net Ecosystem Exchange (NEE) and associated with phenological satellite measurements, plays an important role in understanding biosphere-atmosphere interactions in Amazonia, considering the accelerated deforestation in recent years. Using data from flux measurements tower in the Caxiuanã-PA(2005-2008), climatic data, CO2 exchange estimated by eddy covariance and satellite vegetation indices (MODIS), this work aimed to describe the energy flux, climatic and carbon cycle patterns of the site, correlating its gross primary productivity with satellite vegetation indices. The results found were: i) marked seasonality of climatic variables and energy fluxes, with evapotranspiration and air temperature at the site following the annual march of solar radiation and precipitation; ii) energy fluxes in phase and dependent on the available energy; iii) the site as a carbon sink, varying the intensity according to the site's annual water availability; iv) low correlation between productivity data and vegetation indices, corroborating literature data on these variables in this type of environment. The results show the importance of preserving this type of environment for the global climatic balance and the need to improve satellite estimates for this region.

COMMITTEE MEMBERS:
Interno - 1752417 - CLAUDIO MOISES SANTOS E SILVA
Presidente - ***.400.082-** - GABRIEL BRITO COSTA - UFOPA
Externa à Instituição - KEILA RÊGO MENDES - ICMBio