spettroscopia 2 fisica ambientale 2 antonio ballarin denti [email protected]
TRANSCRIPT
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SPETTROSCOPIA 2SPETTROSCOPIA 2
FISICA AMBIENTALE 2FISICA AMBIENTALE 2
Antonio Ballarin DentiAntonio Ballarin [email protected]@dmf.unicatt.it
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HALOE’s gas filter radiometer conceptHALOE’s gas filter radiometer concept
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HALOE’s HCl narrow-band spectral function HALOE’s HCl narrow-band spectral function to selectively defect HClto selectively defect HCl
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HALOE optical diagram. The different gases are detected HALOE optical diagram. The different gases are detected at different at different λλ. By splitting the spectrum by means of dichroic . By splitting the spectrum by means of dichroic beamsplitters, parallel detection of all eight gases is possiblebeamsplitters, parallel detection of all eight gases is possible
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HALOE HCl, HF, CH4, O3, H2O and NO zonal mean mixing ratiosobtained 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.
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LIDAR: aspetti fisici e tecniciLIDAR: aspetti fisici e tecnici
The “off wavelength”: only scattering, no absorption.
A simple representation of the optical DIAL process. A simple representation of the optical DIAL process.
The “on wavelenght”
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SPETTROSCOPIA AMBIENTALESPETTROSCOPIA AMBIENTALELIDAR: aspetti fisici e tecniciLIDAR: aspetti fisici e tecnici
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LIDAR: aspetti fisici e tecniciLIDAR: aspetti fisici e tecnici
Ozone absorption cross-section at 195 K. Absorption is most effective at 255 nm.