The Global Ozone Monitoring Experiment (GOME) was launched on April 1995 on board ESA's second European Remote Sensing Satellite (ERS-2).
This instrument can measure a range of atmospheric trace constituents, with the emphasis on global ozone distributions. Furthermore cloud properties and intensities of ultraviolet radiation are ... retrieved. These data are crucial for monitoring the atmospheric composition and the detection of pollutants.
DLR generates the operational GOME/ERS-2 level 1 and level 2 products on behalf ESA. GOME Near Real Time (NRT) products are available three hours after sensing. The NRT service was started in 1997 by setting up the GOME Data Processor at Kiruna station. Nowadays the GOME raw data is transmitted form all ERS-2 receiving stations, including the DLR Antarctic station at O'Higgins, to the DLR for further processing.
Algorithm:
The operational BrO total column products are generated using the algorithm GDP (GOME Data Processor) version 4.x integrated into the UPAS (Universal Processor for UV/VIS Atmospheric Spectrometers) processor for generating level 2 trace gas and cloud products.
Activities on further improvements of the BrO column algorithm are ongoing [Van Roozendael and Theys (2005), Theys et al. (2009b)] This work focuses on optimizing the accuracy of global total BrO columns, as well as polar tropospheric BrO columns.
DOAS slant column fitting:
On the basis of noise driven considerations, the fitting window 336-351.5 nm was selected for the GOME-2. A BrO cross-section is included in the fit, as well as the cross-sections of the interfering trace gases: ozone, NO2, O2-O2. Two Ring reference spectrums are included as an additive fitting parameter. The detailed DOAS settings used for GOME-2 BrO slant columns retrieval are given in the [DLR/GOME-2/ATBD].
AMF and VCD determination:
The AMF is calculated with the LIDORT 3.3 model for the fitting window mid-point, since BrO is an optically thin absorber in this wavelength region. To incorporate the seasonal and latitudinal variation in stratospheric BrO in the AMF calculations, a stratospheric BrO profile climatology is used [Bruns et al. (2003)]. This climatology contains monthly mean BrO profiles as a function of latitude, based on the chemistry transport model SLIMCAT.
Acknowledgments: GDP 4.x for total BrO retrieval is being developed by scientists from BIRA and DLR: • BIRA: Michel Van Roozendael, Nicolas Theys • DLR: Nan Hao, Pieter.Valks, Walter Zimmer, Sunil Emmadi and is funded by EUMETSAT O3M-SAF and national contributions.
Name:
DIEGO
LOYOLA
Email:
Diego.Loyola at dlr.de
Contact Address:
German Aerospace Center
German Remote Sensing Data Center City:
Oberpfaffenhofen-Wessling
Province or State:
Bavaria
Country:
Germany
Personnel
MICHAEL
MORAHAN Role:
SERF AUTHOR
Phone:
301-614-5107
Fax:
301-614-5304
Email:
Michael.P.Morahan at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Code 610.2 City:
Greenbelt
Province or State:
MD
Postal Code:
20771
Country:
USA
Publications/References
Theys N., Van Roozendael M., Dils B., Hendrick F., Hao N., De Maziere, M. (2009), First satellite detection of volcanic bromine monoxide emission after the Kasatochi eruption, Geophysical Research Letters, 36, L03809, doi:10.1029/2008GL036552, http://atmos.caf.dlr.de/gome2/docs/theys_09.pdf
Theys, N., Van Roozendael,M., Q. Errera, F. Hendrick, F. Daerden, S. Chabrillat, M. Dorf, K. Pfeilsticker, A. Rozanov, W. Lotz, J. P. Burrows, J.-C. Lambert, F. Goutail, H. K. Roscoe, and M. De Mazi`ere (2009b), A global stratospheric bromine monoxide climatology based on the BASCOE chemical transport model, Atmos. Chem. Phys., 9, 831-848,, http://www.atmos-chem-phys.net/9/831/2009/acp-9-831-2009.pdf
Van Roozendael, M., and N. (2005), Theys BrO column retrieval algorithms for GOME-2, O3M-SAF Visiting Scientist Activity
Bruns M., H. Bovensmann, A. Richter, and J.P. (2003), Burrows A Stratospheric BrO climatology for the GOME-2 instrument, O3M-SAF Visiting Scientist Activity, http://atmos.caf.dlr.de/gome2/docs/bruns_03.pdf
Van Roozendael, M., A. Richter, T. Wagner, I. Pundt, D. W. Arlander, J. P. Burrows, M. Chipperfield, C. Fayt, P. V. Johnston, J.-C. Lambert, K. Kreher, K. Pfeilsticker, U. Platt, J.-P. Pommereau, B.-M. Sinnhuber, K. K. Tørnkvist, and F. Wittrock (2002), Intercomparison of BrO Measurements from ERS-2 GOME, Ground-Based and Balloon Platforms, Adv. Space Res., 29, 1661-1666
Creation and Review Dates
SERF Creation Date:
2010-07-19
SERF Last Revision Date:
2011-12-01
Links
