RESERVA ECOLÓGICA DO IBGE RECOR SITE BRASÍLIA. IMAGEM DO SATÉLITE IKONOS, 2001 RECOR CAMPO SUJO CERRADO.

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Presentation transcript:

RESERVA ECOLÓGICA DO IBGE RECOR SITE BRASÍLIA

IMAGEM DO SATÉLITE IKONOS, 2001 RECOR CAMPO SUJO CERRADO

Tower Bienal Quadrienal Control

CAMPO SUJO

Tower

CERRADO

CAMPO SUJO CERRADO

Net Radiometer – Kipp & Zonen Pyranometer – Kipp & Zonen PAR LITE – Kipp & Zonen Solent R3 A - Gill Instruments Batteries Data Logger CR23X – Campbell IRGA Li-Cor 6262; Pump (500 cm³.s -1 ); Tube  5 mm internal (Dekabon 1300, Deane & Co., Glasgow, UK) ; Lap Top Soil heat flux plate (Solar Radiation Instruments, Melbourne, Australia) ; 2 Thermopar (type T - cobre- constantan). Installed below ground 2 cm

SOFTWARE Eddy Software package Olaf Kolle & Corinna Rebmann Max – Plank – Institute for Biochemistry

To Data Acquisition Characteristics Restricted to be used only in conjunction with the Gill sonic anemometer R3; Allows visualization of fluxes and averages in the field; User Friendly Software

Can Find the: Time lags to CO 2 and H 2 O Spikes in records.

Steps to find the Inductance 1.) use cospectra of wT, wCO2 and wH2O 2.) take data under ideal conditions (fluxes should be large) to get fully developed cospectra: the inductance is a system property and should not depend on environmental factors. 3.) create several 30 min cospectra and average them (use Specmean.exe): often 10 Cospetra are used to average. 4.) then determine the appropriate inductance Inductance Method to correct high frequency losses (Eugster, W and Senn, W, 1995, A Cospetral correction model for measurements of turbulent NO2 flux, Boundary-Layer-Meteorology 74, ) Used to calculate mean spectra of any kind from the output files

Eddy Flux Conversion of raw data into physical data; Calculation of average and variances; Coordinate rotations (2 or 3 rotations); Filter low and/or high frequencies Detrending of the time series Uses a linear detrending algorithm to avoid low frequency losses – Gash, J.H.C. & Gulf, A. D. 1996); Calculate the time lags – It could use a specific time lag or default values when the program could not calculate it – specially at low fluxes Calculate the fluxes for CO 2, H 2 O and Heat;

Aditional calculations and corrections Stationarity test following Foken & Wichuria (1996); Webb Correction: considers the influences of density fluctuations (to LI7500) (Weeb et. Al. 1980); Footprint calculation according to Schuepp et. al. (1990); Correction of CO 2 and H 2 O fluxes according to Eugster & Senn (1995); Integral turbulence characteristics according to Foken & Wichura (1996); Calculate the non-stationarity of data.

Campo Sujo Tower - RECOR

Cerrado Tower - RECOR