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Analysis of the Transformed of Wavelet of Morlet in Signs of Temperature, Humidity and CO2 in the Experimental Site of Santarém

Cintya de Azambuja Martins, 1Laboratório de Micrometeorologia, Departamento de Física,UFSM, cmartins@mail.ufsm.br (Presenting)
Osvaldo L.L. Moraes, 1Laboratório de Micrometeorologia, Departamento de Física,UFSM, moraes@mail1.ufsm.br
Otávio Costa Acevedo, 1Laboratório de Micrometeorologia, Departamento de Física,UFSM, otavio@smail.ufsm.br
Leonardo D.A. Sá, Museu Paraense Emílio Goeldi,PA, CPTEC-INPE, ldsa@museu-goeldi.br
David R. Fitzjarrald, Atmospheric Sciences Research Center, University at Albany, SUNY, USA, fitz@asrc.cestm.albany.edu
Ricardo K. Sakai, Atmospheric Sciences Research Center, University at Albany, SUNY, USA, sakai@asrc.cestm.albany.edu

The nocturnal boundary layer (NBL) presents a challenge to the researchers due to its complexity. In stable conditions turbulence intensity is weak and the eddy covariance (EC) flux calculation is inadequate. Also, nonstationary and intermittent processes, including gravity waves makes the parameterization of the NBL in terms of time and space scales difficult. One of the most important outstanding problems in NBL studies is the correct determination of the turbulent fluxes. To calculate the turbulent fluxes correctly one needs to know the structure of the turbulent fields and their singularities that affect the fluxes themselves. These singularities present themselves in the form of coherent structures and wave motions. In this work the nocturnal turbulent eddies will be studied through wavelet analyses of the time series of temperature, humidity and CO2. The main purposes of this study are to find singularities in these variables and to obtain the relative intensity of the singularities at different scales. The data set used here was collected in the pasture site of the LBA-ECO (3.012o S, 54.537o W) located near the km 77 of the Cuiaba-Santarem highway. This site has an EC system comprised of a 3D sonic anemometer and an infrared gas analyzer to measure CO2 and H2O concentrations. Our results show that particular criteria used to define coherent structures could be a useful task to determine its time life and its contribution to the turbulent fluxes.

Science Theme:  LC (Land Use and Land Cover Change)

Presentation Type:  Poster

Abstract ID: 31

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