World Library  


Add to Book Shelf
Flag as Inappropriate
Email this Book

Comparison of Aeronet and Skyrad4.2 Inversion Products Retrieved from a Cimel Ce318 Sunphotometer : Volume 4, Issue 6 (18/11/2011)

By Estellés, V.

Click here to view

Book Id: WPLBN0003984348
Format Type: PDF Article :
File Size: Pages 31
Reproduction Date: 2015

Title: Comparison of Aeronet and Skyrad4.2 Inversion Products Retrieved from a Cimel Ce318 Sunphotometer : Volume 4, Issue 6 (18/11/2011)  
Author: Estellés, V.
Volume: Vol. 4, Issue 6
Language: English
Subject: Science, Atmospheric, Measurement
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2011
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

APA MLA Chicago

Utrillas, M. P., Expósito, F., Estellés, V., Martínez-Lozano, J. A., & Campanelli, M. (2011). Comparison of Aeronet and Skyrad4.2 Inversion Products Retrieved from a Cimel Ce318 Sunphotometer : Volume 4, Issue 6 (18/11/2011). Retrieved from http://www.ebooklibrary.org/


Description
Description: Dept. Física de la Terra i Termodinámica, Universitat de València, C/Dr. Moliner 50, 46100 Burjassot, Spain. SKYNET is an international research network of ground based sky-sunphotometers for the observation and monitoring of columnar aerosol properties. The algorithm developed by SKYNET is called SKYRAD.pack, and so far it has been used on Prede instruments only. In this study we have modified the SKYRAD.pack software in order to adapt it to Cimel sunphotometers. A one month database of Cimel data obtained at Burjassot (Valencia, Spain) has been processed with this program and the obtained inversion products have been compared with AERONET retrievals. In general, the differences found were consistent with the individual error assessments for both algorithms. Although the aerosol optical depth compared well for any aerosol burden situation (rmsd of 0.002–0.013 for all wavelengths), inversion products such as the single scattering albedo, refractive index and asymmetry parameter compared better for higher turbidity situations. The comparison performed for cases with an aerosol optical depth at 440 nm over 0.2 showed rms differences of 0.025–0.049 for single scattering albedo, 0.005–0.034 for the real part of refractive index, 0.004–0.007 for the imaginary part of the refractive index, and 0.006–0.009 for the asymmetry parameter. In respect to the volume distributions, the comparison also showed a good agreement for high turbidity cases (mainly within the 0.01–7 μm interval) although the already known discrepancy in the extremes of the distribution was still found in 40% of cases, in spite of eliminating data and instrumental differences present in previous studies.

Summary
Comparison of AERONET and SKYRAD4.2 inversion products retrieved from a Cimel CE318 sunphotometer

Excerpt
AERONET website: http://aeronet.gsfc.nasa.gov/, last access: October 2011.; Boi, P., Tonna, G., Dalu, G., Nakajima, T., Olivieri, B., and Pompei, A.: Calibration and data elaboration procedure for sky irradiance measurements, Appl. Optics, 38, 896–907, 1999.; Campanelli, M., Nakajima, T., and Olivieri, B.: Determination of the solar calibration constant for a sun-sky radiometer: Proposal of an in situ procedure, Appl. Optics, 43, 651–659, 2004a.; Campanelli, M., Gobbi, G., Tomasi, C., and Nakajima, T.: Intercomparison between aerosol characteristics retrieved simultaneously with a Cimel and Prede sun-sky radiometers in Rome (Tor Vergata AERONET site), Óptica Pura y Aplicada, 37, 3159–3164, 2004b.; Campanelli, M., Estells, V., Tomasi, C., Nakajima, T., Malvestuto, V., and Mart\'{i}nez-Lozano, J. A.: Application of the SKYRAD Improved Langley plot method for the in situ calibration of CIMEL Sun-sky photometers, Appl. Optics, 46, 2688–2702, 2007.; Che, H., Shi, G., Uchiyama, A., Yamazaki, A., Chen, H., Goloub, P., and Zhang, X.: Intercomparison between aerosol optical properties by a PREDE skyradiometer and CIMEL sunphotometer over Beijing, China, Atmos. Chem. Phys., 8, 3199–3214, doi:10.5194/acp-8-3199-2008, 2008.; Dubovik, O., and King, M. D.: A flexible inversion algorithm for retrieval of aerosol optical properties from sun and sky radiance measurements, J. Geophys. Res., 105, 20673–20696, 2000.; Dubovik, O., Smirnov, A., Holben, B., King, M. D., Kaufman, Y. J., Eck, T. F., and Slutsker, I.: Accuracy assessment of aerosol optical properties retrieved from Aerosol Robotic Network (AERONET) Sun and sky radiance measurements, J. Geophys. Res., 105, 9791–9806, 2000.; Dubovik, O., Holben, B., Lapyonok, T., Sinyuk, A., Mischenko, M. I., Yang, P., and Slutsker, I.: Non-spherical aerosol retrieval method employing light scattering by spheroids, Geophys. Res. Lett., 29, 10, doi:10.1029/2001GL014506, 2002a.; Dubovik, O., Holben, B., Eck, T. F., Smirnov, A., Kaufman, Y. J., King, M. D., Tanre, D., and Slutsker, I.: Variability of Absorption and Optical Properties of Key Aerosol Types Observed in Worldwide Locations, J. Atmos. Sci., 59, 590–608, 2002b.; Dubovik, O., Sinyuk, A., Lapyonok, T., Holben, B., Mischenko, M.I., Yang, P., Eck, T., Volten, H., Muñoz, O., Veihelmann, B., van der Zande, W.J., Leon, J.F., Sorokin, M., and Slutsker, I.: Application of spheroid models to account for particle nonsphericity in remote sensing of desert dust, J. Geophys. Res., 111, D11208, doi:10.1029/2005JD006619, 2006.; Eck, T., Holben, B., Reid, J. S., Dubovik, O., Smirnov, A., O'Neill, N. T., Slutsker, I., and Kinne, S.: Wavelength dependence of the optical depth of biomass burning urban and desert dust aerosols, J. Geophys. Res., 104, 31333–31349, doi:10.1029/1999JD900923, 1999.; ESR network website, http://www.euroskyrad.net/, last access: October 2011.; Estellés, V., Utrillas, M. P., Mart\'inez-Lozano, J. A., Alcántara, A., Alados-Arboledas, L., Olmo, F. J., Lorente, J., de Cabo, X., Cachorro, V., Horvath, H., Labajo, A., Sorribas, M., D\'iaz, J. P., D\'iaz, A. M., Silva, A. M., Elias, T., Pujadas, M., Rodrigues, J. A., Cañada, J., and Garc\'ia, Y.: Intercomparison of spectroradiometers and Sun photometers for the determination of the aerosol optical depth during the VELETA-2002 field campaign, J. Geophys. Res., 111, D17207, doi:10.1029/2005JD006047, 2006. \clearpage; Estellés, V., Mart\'inez-Lozano, J. A., Utrillas, M. P., and Campanelli, M.: Columnar aerosol properties in Valencia (Spain) by gr

 

Click To View

Additional Books


  • High Accuracy Measurements of Dry Mole F... (by )
  • A Fully Automated Ftir System for Remote... (by )
  • High Temporal Resolution Estimates of Co... (by )
  • Note on Rotational-raman Scattering in t... (by )
  • Humidity Sensor Failure: a Problem That ... (by )
  • Improved Instrumental Line Shape Monitor... (by )
  • Measurements of Air Pollution Emission F... (by )
  • Doas-measurement of the No2 Formation Ra... (by )
  • Water Vapor Observations up to the Lower... (by )
  • Calibration and Validation of Water Vapo... (by )
  • Improved Cloud Screening in Maiac Aeroso... (by )
  • Relationship Between the No2 Photolysis ... (by )
Scroll Left
Scroll Right

 



Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.