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Spatial and Temporal Uv Irradiance and Aerosol Variability Within the Area of an Omi Satellite Pixel : Volume 9, Issue 14 (16/07/2009)

By Kazadzis, S.

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Book Id: WPLBN0003994925
Format Type: PDF Article :
File Size: Pages 9
Reproduction Date: 2015

Title: Spatial and Temporal Uv Irradiance and Aerosol Variability Within the Area of an Omi Satellite Pixel : Volume 9, Issue 14 (16/07/2009)  
Author: Kazadzis, S.
Volume: Vol. 9, Issue 14
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Kazadzis, S., Zempila, M., Giannakaki, E., Kazantzidis, A., Balis, D., Kouremeti, N.,...Amiridis, V. (2009). Spatial and Temporal Uv Irradiance and Aerosol Variability Within the Area of an Omi Satellite Pixel : Volume 9, Issue 14 (16/07/2009). Retrieved from

Description: Finnish Meteorological Institute, Climate Change Unit, Helsinki, Finland. Results of an experimental campaign that took place in the greater Thessaloniki area were used to investigate temporal and spatial UV variability within an OMI satellite pixel. UV irradiance and aerosol optical depth measurements were performed for a one month period at three sites characterized as urban, rural and industrial, depending on their location and possible local aerosol sources. OMI showed a general UV irradiance overestimation compared to all three sites and for all atmospheric conditions. During the campaign the standard deviation calculated from the three sites for UV irradiance at 324 nm was of the order of 26%. For cloudless days with high spatial aerosol variability, UV differences reached ±20% within the OMI pixel. For cloudy days UV differences up to 100% were found at the three sites, a percentage that depends on the ground-based data integration time used for the comparison. Here we tried to focus on the limitations when trying to interpret results of UV irradiance comparisons between OMI satellite and ground based stations, taking into account the UV variability within an OMI pixel, due to such small scale spatial cloud and aerosol inhomogeneities.

Spatial and temporal UV irradiance and aerosol variability within the area of an OMI satellite pixel

Amiridis, V., Balis, D. S., Kazadzis, S., Bais, A., Giannakaki, E., Papayannis, A., and Zerefos, C.: Four-year aerosol observations with a Raman LIDAR at Thessaloniki, Greece, in the framework of European aerosol Research LIDAR Network (EARLINET), J. Geophys. Res., 110(D21), D21203, doi:10.1029/2005JD006190, 2005.; Arola, A., Kazadzis, S., Krotkov, N., Bais, A., Groebner, J., and Herman, J. R.: Assessment of TOMS UV bias due to absorbing aerosols, J. Geophys. Res., 110, D23211, doi:10.1029/2005JD005913, 2005.; Bais A. F.: Absolute spectral measurements of direct solar ultraviolet irradiance with a Brewer spectrophotometer, Appl. Optics, 36, 5199–5204, 1997.; Bais, A. F., Kazantzidis, A., Kazadzis, S., Balis, D. S. , Zerefos, C. S., and Meleti, C.: Deriving an effective aerosol single scattering albedo from spectral surface UV irradiance measurements, Atmos. Environ., 39(6), 1093–1102, 2005.; Balis D., Amiridis, V., Zerefos, C., and Papayannis, A.: Verification of the Experimental Determination of the LIDAR Overlap Profile by a Raman LIDAR, International Laser Radar Conference (ILRC21), Quebec, Canada, 2002.; Bernhard, G. and Seckmeyer, G.: Uncertainty of measurements of spectral solar UV irradiance, J. Geophys. Res., 104, 14321–14345, 1999.; Bhartia, P. K. and Wellemeyer, C. W.: TOMS-V8 total O3 algorithm, in OMI Algorithm Theoretical Basis Document, NASA Goddard Space Flight Cent., Greenbelt, Md., 2002.; Buchard, V., Brogniez, C., Auriol, F., Bonnel, B., Lenoble, J., Tanskanen, A., Bojkov, B., and Veefkind, P.: Comparison of OMI ozone and UV irradiance data with ground-based measurements at two French sites, Atmos. Chem. Phys., 8, 4517–4528, 2008.; Fioletov, V. E., Kerr, J. B., Wardle, D. I., Krotkov, N., and Herman, J. R.: Comparison of Brewer ultraviolet irradiance measurements with total ozone mapping spectrometer satellite retrievals, Opt. Eng., 41(12), 3051–3061, 2002.; Garane, K., Bais, A. F., Kazadzis, S., Kazantzidis, A., and Meleti, C.: Monitoring of UV spectral irradiance at Thessaloniki (1990–2005): Data re-evaluation and quality control, Ann. Geophys., 24(12), 3215–3228, 2006.; Herman, J. R., Krotkov, N., Celarier, E., Larko, D., and Labow, G.: Distribution of UV radiation at the Earth's surface from TOMS-measured UV-backscattered radiances, J. Geophys. Res.-Atmos., 104(D10), 12059–12076, 1999.; Ialongo, I., Casale, G. R., and Siani, A. M.: Comparison of total ozone and erythemal UV data from OMI with ground-based measurements at Rome station, Atmos. Chem. Phys., 8, 3283–3289, 2008.; Report of the Advisory Group on Non-ionising Radiation (AGNIR): Effects of Ultraviolet Radiation on Human Health, Documents of the NRPB, 13, No. 1, 3–276, 2002.; Tanskanen, A., Krotkov, N. A., Herman, J. R., and Arola, A.: Surface ultraviolet irradiance from OMI, IEEE T. Geosci. Remote, 44(5), 1267–1271, 2006.; Kalliskota, S., Kaurola, J., Taalas, P., Herman, J. R., Celarier, E., and Krotkov, N.: Comparison of the daily UV doses estimated from Nimbus7/TOMS measurements and ground-based spectroradiometric data, J. Geophys. Res., 105, 5059–5067, doi:10.1029/1999JD900926, 2000.; Kazadzis, S., Bais, A., Amiridis, V., Balis, D., Meleti, C., Kouremeti, N., Zerefos, C. S., Rapsomanikis, S., Petrakakis, M., Kelesis, A., Tzoumaka, P., and Kelektsoglou, K.: Nine years of UV aerosol optical depth measurements at Thessaloniki, Greece, Atmos. Chem. Phys., 7, 2091–2101, 2007.; Kazadzis, S., Bais, A., Arola, A., Krotkov, N., Kouremeti, N., and Meleti, C.: Ozone Monitoring Instrument spectral UV irradiance products: comparison with ground based measurements at an urban environment, Atmos. Chem. Phys., 9, 585–594, 2009.; Kazantzidis, A., Bais, A. F., Grobner, J., Herman, J. R., Kazadzis, S., Krotkov, N., Kyro, E., den Outer, P. N., Garane, K., G\{ } orts, P., Lakkala, K., Meleti, C., Slaper, H., Tax, R. B., Turunen, T., and Zerefos, C. S.: Comparison of satellite-derived UV irradiances with 30 ground-based measurements at four


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