Ozone and nitrogen dioxide total columns and vertical distributions at the Italian Antarctic station during 1996-2008

D. Bortoli; F. Ravegnani; G. Giovanelli; Iv. Kostadinov; A. Petritoli; S. Masieri; M. Premuda; H. T. Martins; A. M. Silva

doi:10.1117/12.830085

29 September 2009 Ozone and nitrogen dioxide total columns and vertical distributions at the Italian Antarctic station during 1996-2008

D. Bortoli, F. Ravegnani, G. Giovanelli, Iv. Kostadinov, A. Petritoli, S. Masieri, M. Premuda, H. T. Martins, A. M. Silva

Author Affiliations +

Proceedings Volume 7475, Remote Sensing of Clouds and the Atmosphere XIV; 74751I (2009) https://doi.org/10.1117/12.830085
Event: SPIE Remote Sensing, 2009, Berlin, Germany

Abstract

The GASCOD (Gas Analyzer Spectrometer Correlating Optical Differences) has been installed at the 'Mario Zucchelli' Antarctic station since 1996. It measures the zenith sky radiation in the 405-465 nm spectral range in unattended and automatic mode. The application to the spectral data of the DOAS (Differential Optical Absorption Spectroscopy) algorithms coupled with a Radiative Transfer Model (RTM) for the computation of the Air Mass Factor (AMF), allows for the retrieval of the total content of the main absorber in this spectral range, namely nitrogen dioxide (NO2). Moreover, the application of sophisticated inversion schemes to the output of the DOAS program, using the AMF matrix as the kernel of the inversion algorithm, permits the determination of the vertical distribution of the above mentioned compound. The full dataset of the spectral data obtained with GASCOD during the period 1996-2008, was re-analyzed with a modified version of the software tool previously utilized. Even if the spectral range examined with GASCOD is not the most favorable for the ozone total column and vertical profile retrieval, the re-processing of the spectral data allowed for the determination of the total ozone columns (TOC). The uncertainties range from 4% to 8% for ozone and 3% to 6% for NO2. The peculiar features of the seasonal variation of NO2 total columns (i.e. the normal decreasing during the austral fall and the irregular growing towards the summer month) are presented and discussed. The confirmations of the significant declining of the ozone total columns during the 'Ozone Hole' periods (mid-August to mid-October) are reported. The vertical distributions obtained for the preceding atmospheric compounds are shown and examined.

Citation Download Citation

D. Bortoli, F. Ravegnani, G. Giovanelli, Iv. Kostadinov, A. Petritoli, S. Masieri, M. Premuda, H. T. Martins, and A. M. Silva "Ozone and nitrogen dioxide total columns and vertical distributions at the Italian Antarctic station during 1996-2008", Proc. SPIE 7475, Remote Sensing of Clouds and the Atmosphere XIV, 74751I (29 September 2009); https://doi.org/10.1117/12.830085

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available