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OPTICAL PROPERTIES

We discuss the results obtained on Station A6 on 2005-04-13. UV and visible irradiance at surface are shown in Fig.19, while Fig.20 presents the irradiance profiles in water. Since the PAR profile evidenced a stratification in the water column, an unique exponential function was not found. To overcome this, we studied the attenuation coefficient every 10m down to 60m depth. Between 60 and 80 m depth we were able to define a single decreasing exponential function to represent the radiative transfer along the water column.

figure

Figure 19: Station A6. UV-B(up), UV-B (mid) and visible (lower) irradiance data at surface.
\begin{figure}\centerline{\epsfig{file=IMG/IRR_FIG1.ps,height=15cm}} \end{figure}

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Figure 20: Station A6. Irradiance in water measured by PUV 541.
\begin{figure}\centerline{\epsfig{file=IMG/IRR_FIG2.ps,width=12.5cm}} \end{figure}

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Figure 21: Station A6. PAR attenuation coefficient.
\begin{figure}\centerline{\epsfig{file=IMG/IRR_FIG3.ps,width=10cm}} \end{figure}

Fig.22 presents the spectral irradiance in the water column. figure

Figure 22: Station A6. Spectral irradiance measure by EPP2000.
\begin{figure}\centerline{\epsfig{file=IMG/IRR_FIG4.ps,width=10cm}} \end{figure}

next up previous contents
Next: ODAS BUOY SERVICING Up: OCEANOGRAPHY Previous: CURRENT METERS OBSERVATIONS   Contents
2005-11-04