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1 - Instituto de Biologia da UFRJ

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a<br />

b<br />

c<br />

d<br />

e<br />

f<br />

g<br />

Figure 3. Diurnal variation, at 3 different levels, of (a) air temperature ( ° C), (b) specific humidity (g kg –1 ), (c) wind velocity (m s –1 ) and (d) wind direction (<strong>de</strong>gree).<br />

Photograph of the instruments (e) south tower upper level sensors, (f) middle level and (g) lower level.<br />

(year <strong>da</strong>y 52) there was a large input of energy, heating<br />

consi<strong>de</strong>rably the surface and the surface layer (Figure 5).<br />

There is a substantial imbalance that may be related to the<br />

methodology used to estimate the turbulent fluxes (indirect<br />

method), lack of representativeness of the soil heat flux and<br />

advection of heat associated mainly to the heterogeneity of<br />

the land use and topography of the region of the Brazilian<br />

Antarctic Station Coman<strong>da</strong>nte Ferraz. The next step is to<br />

compare the indirect method with the eddy correlation<br />

method. This will be possible when the sonic anemometer<br />

42 | Annual Activity Report 2011

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