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Michel Van Roozendael

BIRA-IASB station report . Michel Van Roozendael. NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 1. BIRA-IASB MAXDOAS team. Caroline Fayt Christian Hermans François Hendrick Gaia Pinardi Alexis Merlaud Tim Vlemmix Frederik Tack Clio Gielen

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Michel Van Roozendael

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  1. BIRA-IASB station report Michel Van Roozendael NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 1

  2. BIRA-IASB MAXDOAS team • Caroline Fayt • Christian Hermans • François Hendrick • Gaia Pinardi • Alexis Merlaud • Tim Vlemmix • Frederik Tack • Clio Gielen • Michel Van Roozendael NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 2

  3. Jungfraujoch (46°N, 8°E); 1990  Harestua (60°N, 11°E); 1994  Haute Provence (44°N, 5°E); 1998  BIRA-IASB stations Uccle (51°N, 4.4°E); 2011  Beijing/Xianghe (40°N, 115°E); 2008  Reunion Island (21°S, 55°E); 2002  Bujumbura (3°S, 30°E); 2013  FTIR NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 3

  4. Jungfraujoch station (46°N, 8°E) • SAOZ zenith-sky system operatedsince 1990 • Stratospheric NO2 & O3column monitoring  NDACC • New dual-channel MAXDOAS system installed in July 2010 • Direct-sun • Zenith-skytwilight • MAXDOAS • Stratospheric NO2, O3 & BrO • Tropospheric NO2, HCHO, aerosol • Additional (TBC): tropospheric H2O and O3 NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 4

  5. Harestua station (60°N, 11°E) • Dual channelzenith-sky system operatedsince 1998 • Stratospheric NO2, O3 + BrO and OClO (chlorine activation) • Long-term trend of BrO • In preparation: • Installation of new dual channelzenith-sky system, to beupgradedlaterwith MAXDOAS • Instrument undertestingat BIRA, to beset-up on site in summer 2012 • Overlapoperationwithold system isplanned to minimizerisks of discontinuity/bias in the time-series (e.g. BrO) NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 5

  6. OHP station (44°N, 5°E) • UV zenith-sky system operatedsince 1998, with focus on BrO monitoring • Upgraded in 2005 to allow for MAXDOAS measurements • StratosphericBrO and NO2 • TroposphericNO2 and HCHO columns • System does not allow MAXDOAS profile retrievals (pointingaccuracyproblemsatlowelevations) • New MAXDOAS system in preparation for replacement in 2013 NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 6

  7. Beijing/Xianghe station (40°N, 115°E) • Dual-channel MAXDOAS system installed in Beijing in summer 2008duringOlympics • Operated for about 10 months • Troposphericcolumn and profiles of NO2, HCHO, glyoxal, HONO, SO2, aerosol • Stratospheric NO2, O3, BrO • Re-installed in Xianghe (50 km East of Beijing) in January 2010 for long-termoperation • 2 years of successfuloperation • NO2, HCHO, HONO, glyoxal, aerosol, SO2, etc • Data exploitation ongoing NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 7

  8. Uccle station (51°N, 4.4°E) • Hoffman mini-MAXDOAS system installedat RMI in April 2011 • Operated for about one year as part of AGACC-2 project • Focus on tropospheric NO2 and aerosol • Complementarymeasurementsavailable on site: • CIMEL sunphotometer • Brewerspectrophotometer • Regular ozone and meteo sondes • Ceilometer • In-situ NO2 (from Brussels AQ network) NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 8

  9. Bujumbura station (3°S, 30°E) • New site in project as part of national project AGACC-2 • Dual-channel MAXDOAS system, to beinstalled on the site of the University of Burundi in Bujumbura • Tropospheric NO2, SO2, HCHO, glyoxal, aerosol • Contacts established in May 2012 • Plan for installation in December 2012 • CooperationwithUniversity of Burundi for joint exploitation of the measurements NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 9

  10. BIRA-IASB MAXDOAS system • Main parts: • Sun tracker (pointing accuracy < 0.1°) • Telescope (off-axis parabolic mirror) • 2 spectrometers • 2 cooled low-noise CCDs • 2 computers • 2 Channels: • UV = 300 - 390 nm • VIS = 400 - 550 nm • Measurement modes: • Elevation scan • Azimuth scan (almucantar) • Direct-sun capability NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 10

  11. Spectral coverage and measuredspecies UV channel O4 SO2 HCHO, HONO O3 BrO VIS channel O3 H2O H2O O4 NO2, glyoxal O4 O4 O2 NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 11

  12. Data evaluationtools • QDOAS • genericmulti-purpose DOAS retrievaltooldeveloped and maintained by Caroline Fayt • cross-platform compatible software written in C/C++ + QT (GUI) • large distribution (> 100 usersworldwide) • Uvspec/DISORT • radiative transfertooloptimised for twilightstratospheric profile retrievals, coupled to 1D photochemical box model PSCBox and SLIMCAT for the initialisation (collaboration with M. Chipperfield) • BePro • LIDORT-based MAXDOAS optimal estimation retrievaltooldeveloped by Katrijn Clémer • Ongoing developmentwith RT-Solutions (R. Spurr) • LIDORT-basedtwilighttool, withcapability to handle 2D photochemicalfields, linearisedjacobians, and horizontal averagingkernels NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 12

  13. Ongoing projects and plans • Ongoing MAXDOAS-related R&D projects • FP7 SHIVA, NORS, ACTRIS • national AGACC-2 project • Involvement in satellite validation activities • ESA Multi-TASTE • SQWG (SCIAMACHY Quality Working Group) • ESA Ozone_cci • EUMETSAT O3MSAF (GOME-2 and IASI continuous development and operations) • Future activities • Maintenance and extension of BIRA stations (e.g. Burundi) • Continued development of BIRA retrieval tools • Improvements of operational aspects of the monitoring in support of satellite validation and GMES (NORS) • Continued scientific exploitation of the BIRA data sets, in collaboration with NDACC partners NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 13

  14. Recent publications of the group • Vigouroux, C. et al., Ground-based FTIR and MAX-DOAS observations of formaldehyde at Réunion Island and comparisons with satellite and model data, Atmos. Chem. Phys., 9, 9523-9544, 2009. • Clémer, K. et al., Multiple wavelength retrieval of tropospheric aerosol optical properties from MAXDOAS measurements in Beijing, Atmos. Meas. Tech., 3, 863–878, 2010. • Roscoe, H.K. et al., Intercomparison of slant column measurements of NO2 and O4 by MAX-DOAS and zenith-sky UV and visible spectrometers, Atmos. Meas. Tech., 3, 1629-1646, 2010. • Hendrick, F. et al., NDACC UV-visible total ozone measurements: Improved retrieval and comparison with correlative satellite and ground-based observations, Atmos. Chem. Phys., 11, 5975-5995, doi:10.5194/acp-11-5975-2011, 2011. • Valks, P. et al., Operational total and tropospheric NO2 column retrieval for GOME-2/MetOp, Atmos. Meas. Tech., 4, 1491-1514, doi:10.5194/amt-4-1491-2011, 2011. • Zieger, P. et al., Comparison of ambient aerosol extinction coefficients obtained from in-situ, MAX-DOAS and LIDAR measurements, Atmos. Chem. Phys., 11, 2603-2624, 2011. • Irie, H. et al., Eight-component retrievals from ground-based MAX-DOAS observations, Atmos. Meas. Tech., 4, 1027-1044, doi:10.5194/amt-4-1027-2011, 2011. • Merlaud, A. et al., Airborne DOAS measurements in Arctic: vertical distributions of aerosol extinction coefficient and NO2 concentration, doi:10.5194/acp-11-9219-2011, Atmos. Chem. Phys., 11, 9219–9236, 2011. • Piters, A. et al., The CabauwIntercomparison campaign for Nitrogen Dioxide measuring Instruments (CINDI): design, execution, and early results, Atmos. Meas. Tech., 5, 457-485, doi:10.5194/amt-5-457-2012, 2012. • Pinardi, G. et al., Intercomparison of Multi-Axis DOAS Formaldehyde slant columns during the CINDI campaign, to be submitted to Atmos. Meas. Tech. (2012) • Hendrick, F., et al., Trend analysis of stratospheric NO2 at Jungfraujoch (46.5°N, 8.0°E) using ground-based UV-visible, FTIR, and satellite nadir observations, Atmos. Chem. Phys. Discuss., 12, 12357-12389, 2012. NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 14

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