Banca de QUALIFICAÇÃO: LUCIANNE FARIAS DA SILVA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : LUCIANNE FARIAS DA SILVA
DATE: 04/07/2022
TIME: 10:00
LOCAL: https://meet.google.com/cgr-ahuy-rod
TITLE:

INFLUENCE OF EL NIÑO-SOUTHERN OSCILLATION (ENSO) ON CO2 CONCENTRATION AND EVASION AT
THE MOUTH OF THE AMAZONAS RIVER

KEY WORDS:

Carbon cycle. Amazon estuary. Climate changes.

PAGES: 34
BIG AREA: Outra
AREA: Ciências Ambientais
SUMMARY:

River systems, for a long time, were considered to transport carbon from land to oceans, however, the paradigm shift has led to the knowledge that a large fraction of land-derived organic carbon is transported and decomposed along river system, being emitted to the atmosphere in the form of carbon dioxide (CO2). In this sense, the quantification of greenhouse gas emissions in aquatic and terrestrial ecosystems with more reliable values has become a priority, given the current context with regard to climate change. The extremes resulting from climatic events impact the physiological response of the Amazon forest, decreasing the availability of atmospheric CO2. That said, the objective of this study will be to investigate the influence of the occurrence of El Niño-Southern Oscillation (ENSO) and its different phases/intensities (El Niño; La Niña) on the concentration and evasion of CO2 at the mouth of the Amazon River, analyzing the influence of hydrodynamics and biogeochemical parameters that act as forcing the flow of CO2. To this end, CO2 flow and concentration data obtained by means of an infrared gas analyzer (IRGA) model LiCor 820, coupled to a floating chamber and a balancer, will be analyzed, in addition to hydrodynamic and biogeochemical data collected bimonthly for the period between 2010 and 2019, specifically in a transect of the North Channel of the mouth of the Amazon River. The precipitation measurements collected through the database of the National Institute of Meteorology (INMET), as well as the exact period of occurrence of the ENOS phenomena at the Center for Weather Forecasting and Climate Studies of the National Institute for Space Research (CPTEC/INPE). After the development of the research, it is expected to determine the variability of CO2 evasion in the region of the Amazon estuary under the influence of extreme events, describing the main variations in the parameters that influence the flow at the water-atmosphere interface, in addition to the possible impacts of climate change in this region and reduce uncertainties related to the regional carbon balance in aquatic environments.

BANKING MEMBERS:
Externo à Instituição - ALAN CAVALCANTI DA CUNHA - UNIFAP
Interno - 1794276 - JOSE MAURO SOUSA DE MOURA
Presidente - 1549120 - RODRIGO DA SILVA