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SPETTROSCOPIA 2 FISICA AMBIENTALE 2 Antonio Ballarin Denti

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Presentation on theme: "SPETTROSCOPIA 2 FISICA AMBIENTALE 2 Antonio Ballarin Denti"— Presentation transcript:

1 SPETTROSCOPIA 2 FISICA AMBIENTALE 2 Antonio Ballarin Denti

2 HALOEs gas filter radiometer concept

3 HALOEs HCl narrow-band spectral function to selectively defect HCl

4 HALOE optical diagram. The different gases are detected at different λ. By splitting the spectrum by means of dichroic beamsplitters, parallel detection of all eight gases is possible

5 HALOE HCl, HF, CH 4, O 3, H 2 O and NO zonal mean mixing ratios obtained on 5 May (HCl and HF) and 7 May (the other gases) 1992 at 34°N compared to these same mixing ratios obtained on 5 May at 29°N by the ATMOS satellite. Note the different axes in the different figures.

6 LIDAR: aspetti fisici e tecnici The off wavelength: only scattering, no absorption. A simple representation of the optical DIAL process. The on wavelenght

7 SPETTROSCOPIA AMBIENTALE LIDAR: aspetti fisici e tecnici

8 Ozone absorption cross-section at 195 K. Absorption is most effective at 255 nm.


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