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Improved Ozone Profile Retrievals from Gome Data with Degradation Correction in Reflectance : Volume 7, Issue 6 (23/03/2007)

By Liu, X.

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Book Id: WPLBN0003994734
Format Type: PDF Article :
File Size: Pages 9
Reproduction Date: 2015

Title: Improved Ozone Profile Retrievals from Gome Data with Degradation Correction in Reflectance : Volume 7, Issue 6 (23/03/2007)  
Author: Liu, X.
Volume: Vol. 7, Issue 6
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2007
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Chance, K., Kurosu, T. P., & Liu, X. (2007). Improved Ozone Profile Retrievals from Gome Data with Degradation Correction in Reflectance : Volume 7, Issue 6 (23/03/2007). Retrieved from http://www.ebooklibrary.org/


Description
Description: Atomic and Molecular Physics Division, Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, USA. We present a simple method to perform degradation correction to Global Ozone Monitoring Experiment (GOME) reflectance spectra by comparing the average reflectance for 60° N–60° S with that at the beginning of GOME observations (July–December 1995) after removing the dependences on solar zenith angle and seasonal variation. The results indicate positive biases of up to ~15–25% in the wavelength range 289–370 nm during 2000–2002; the degradation also exhibits significant dependence on wavelength and viewing zenith angle. These results are consistent with previous studies using radiative transfer models and ozone observations. The degradation causes retrieval biases of up to ~3% (10 DU, 1 DU=2.69×1016 molecules cm−2), 30% (10 DU), 10%, and 40% in total column ozone, tropospheric column ozone, stratospheric ozone and tropospheric ozone, respectively, from our GOME ozone profile retrieval algorithm. In addition, retrieval biases due to degradation vary significantly with latitude. The application of this degradation correction improves the retrievals relative to Dobson and ozonesonde measurements at Hohenpeißenberg station during 2000–2003 and improves the spatiotemporal consistency of retrieval quality during 1996–2003. However, because this method assumes that the deseasonalized globally-averaged reflectance does not change much with time, retrievals with this correction may be inadequate for trend analysis. In addition, it does not correct for instrument biases that have occurred since launch.

Summary
Improved ozone profile retrievals from GOME data with degradation correction in reflectance

Excerpt
Meijer, Y. J., Swart, D. P. J., Baier, F., et al.: Evaluation of Global Ozone Monitoring Experiment (GOME) ozone profiles from nine different algorithms, J. Geophys. Res., 111 (D21), D21306, doi:10.1029/2005JD006778, 2006.; Mishchenko, M. I., Lacis, A. A. and Travis, L. D.: Errors induced by the neglect of polarization in radiance calculations for Rayleigh scattering atmospheres, J. Quant. Spectrosc. Radiat. Transfer, 51, 491-510, 1994.; Müller, M. D., Kaifel, A. K., Weber, M., Tellmann, S., Burrows, J. P., and Loyola, D.: Ozone profile retrieval from Global Ozone Monitoring Experiment (GOME) data using a neural network approach (neural network ozone retrieval system (NNORSY)), J. Geophys. Res., 108(D16), 4497, doi:10.1029/2002JD002784, 2003.; Munro, R., Siddans, R., Reburn, W. J., and Kerridge, B.: Direct measurement of tropospheric ozone from space, Nature, 392, 168–171, 1998.; Schutgens, N. A. J. and Stammes, P.: A novel approach to the polarization correction of spaceborne spectroscopy, J. Geophys. Res., 108 (D7), 4229, doi:10.1029/2002JD002736, 2003.; Snel, R.: In-orbit optical path degradation: GOME experience and SCIAMACHY prediction, ERS Envisat Symposium, SP-461, Göteborg, Sweden, 2000.; Chance, K. V., Burrows, J. P., Perner, D., and Schneider, W.: Satellite measurements of atmospheric ozone profiles, including tropospheric ozone, from ultraviolet/visible measurements in the nadir geometry: A potential method to retrieve tropospheric ozone, J. Quant. Spectrosc. Radiat. Transfer, 57(4), 467–476, 1997.; Connor, B.J., Parrish, A., and Tsou, J.-J.: Detection of stratospheric ozone trends by ground-based microwave observations, Proc. SPIE Int. Soc. Opt. Eng., 1491, 218-230, 1991.; ESA: The GOME users manual, European Space Agency (ESA) Publication SP-1182, ESA Publications Division, ESTEC, Noordwijk, The Netherlands, 1995.; Gupta, S. K., Stackhouse, P. W., Mikovitz, J. C., Cox, S. J. and Zhang, T.: Surface radiation budget over tropical pacific: Interannual variability, 12th Conference on Atmospheric Radiation, Madison, WI, USA, 2006.; Hasekamp, O. P. and Landgraf, J.: Ozone profile retrieval from backscattered ultraviolet radiances: The inverse problem solved by regularization, J. Geophys. Res., 106(D8), 8077–8088, 2001.; Hoogen, R., Rozanov, V. V., and Burrows, J. P.: Ozone profiles from GOME satellite data: Algorithm description and first validation, J. Geophys. Res., 104(D7), 8263–8280, 1999.; Tanzi, C. P., Snel, R., Hasekamp, O., and Aben, I.: Degradation of UV earth albedo observations by GOME, ERS-ENVISAT Symposium, SP-461,Göteborg, Sweden, 2000.; van der A, R. J., van Oss, R. F., Piters, A. J. M., Fortuin, J. P. F., Meijer, Y. J., and Kelder, H. M.: Ozone profile retrieval from recalibrated GOME data, J. Geophys. Res., 107(D15), 4239, doi:10.1029/2001JD000696, 2002.; Krijger, J. M., Aben, I., and Landgraf, J.: CHEOPS-GOME: WP2.1: Study of instrument degradation, ESA SRON-EOS/RP/05-018 Tech. rep., 2005.; Liu, X., Chance, K., Sioris, C. E., Spurr, R. J. D., Kurosu, T. P., Martin, R. V., and Newchurch, M. J.: Ozone profile and tropospheric ozone retrievals from Global Ozone Monitoring Experiment: Algorithm description and validation, J. Geophys. Res., 110(D20), D20307, doi:10.1029/2005JD006240, 2005.; Liu, X., Chance, K., Sioris, C. E., Kurosu, T. P., and Newchurch, M. J.: Intercomparison of GOME, ozonesonde, and SAGE-II measurements of ozone: Demonstration of the need to homogenize available ozonesonde datasets, J. Geophys. Res., J. Geophys. Res., 101 (D14), D114305, doi:10.1029/2005JD006718, 2006.

 

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