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BREDOM network– Overview and Plans

BREDOM network– Overview and Plans. Folkard Wittrock, iup Bremen. Bremian DOAS network for atmospheric measurements (BREDOM). BREDOM. NDACC qualified instruments all stations equipped with MAX-DOAS. Permanent Stations: Ny-Ålesund (79°N) : since 1995 ( 2002 )

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BREDOM network– Overview and Plans

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  1. BREDOM network– Overview and Plans Folkard Wittrock, iupBremen

  2. Bremian DOAS network for atmospheric measurements (BREDOM)

  3. BREDOM NDACC qualified instruments all stations equipped with MAX-DOAS Permanent Stations: Ny-Ålesund (79°N) : since 1995 (2002) Bremen (53°N) : since 1993 (2004) Heraklion (35°N) : since August 2007 Mérida (8°N) : March 2004 to Mai 2009 Nairobi (1°S) : July 2002 to September 2010 Campaigns and temporary stations: OHP (France) : 06. – 07. 1996 (NDACC intercomparison) Kaashidhoo (Maledive) : 02. – 03.1998 (INDOEX) Po valley (Italy) : 07. – 08.2002 and 08. – 09.2003 (FORMAT) Andoya (Norway) : 02. – 03.2003 (NDACC intercomparison) Zugspitze (Germany) : 02.2003 – 07.2003 Summit (Greenland) : 08.2003 – 03.2005 Sylt (Germany) : 03. – 09.2004 Cabauw (Netherlands) : 06. – 07.2005 , 09.2006 (DANDELIONS) and 06. – 07.2009 (CINDI, NDACC intercomparison) RV Polarstern: 08.-10.2006 (ANTXXIII-7) and 04.-05.2008 (ANTXXIV-4) RV Sonne: : 10.2009 (TRANSBROM) Finokalia (Crete) : 06.2007 – 08.2007

  4. CINDI campaign 2009 Roscoe et al., 2010

  5. CINDI campaign 2009 Roscoe et al., 2010

  6. Outlook • New telescope head for all sites • Possible new stations: • Guam: 13°N, 145°E in West Pacific, cooperation with AWI Potsdam, focus on marine chemistry, transport from ocean to stratosphere, very often low ozone • Manaus: 3°S, 60°W, Brazil, forest station, cooperation with University of Sao Paulo, focus on biogenic emissions, biomass burning (-> HCHO, CHOCHO) Shiva campaign around Borneo in 2011 Development of new MAX-DOAS system for Deutsche Bucht (cooperation with BSH)

  7. References to BREDOM • 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, doi:10.5194/amt-3-1629-2010, 2010 • Hains, J.C., et al., Testing and improving OMI DOMINO tropospheric NO2 using observations from the DANDELIONS and INTEX-B validation campaigns, J. Geophys. Res., 115, D05301, doi:10.1029/2009JD012399, 2010 • Ferrari, C. P., et al., Atmospheric mercury depletion event study in Ny-Alesund (Svalbard) in spring 2005. Deposition and transformation of Hg in surface snow during springtime, Science of the Total Environment, 397,167-177, 2008 • Brinksma, E., et l., The 2005 and 2006 DANDELIONS NO2 and Aerosol Intercomparison Campaigns, J. Geophys. Res., 113, D16S46, doi:10.1029/2007JD008808, 2008. • Schönhardt, A., et al., Observations of iodine monoxide columns from satellite, Atmos. Chem. Phys., 8, 637-653, 2008 • Fietkau, S., et al., Ground-based measurements of tropospheric and stratospheric bromine monoxide above Nairobi (1° S, 36° E), Atmos. Chem. Phys. Discuss., 7, 6527-6555, 2007 • Sommar, J., et al., Circumpolar transport and air-surface exchange of atmospheric mercury at Ny-Ålesund (79° N), Svalbard, spring 2002, Atmos. Chem. Phys., 7, 151-166, 2007 • Wittrock, F., et al., Simultaneous global observations of glyoxal and formaldehyde from space, Geophys. Res. Lett., 33, L16804, doi:10.1029/2006GL026310, 2006 • Heckel, A., et al., MAX-DOAS measurements of formaldehyde in the Po-Valley, Atmos. Chem. Phys., 5, 909–918, 2005 • Wittrock, F., et al., MAX-DOAS measurements of atmospheric trace gases in Ny-Ålesund - Radiative transfer studies and their application, Atmos. Chem. Phys., 4, 955-966, 2004

  8. BREDOM – Ny-Ålesund • Ny-Ålesund (79° N, 12° E, 15 m asl) • firsttestof off-axis in April 1998 • MAX-DOAS since 1999 (2 directions) since March 2002 several LOS (scanning), different azimuthfrom 2010 onwards • One Acton andoneOrielspectrometerwith Andor CCD‘scovering 320 – 570 nm • Very clean site -> mainlyvalidationofstratosphericabsorbers, but also retrievalof halogen oxides (e.g. duringLOE‘s (lowozoneevents) • Measurementsofozone, NO2, BrO, OClO, tropospheric IO, BrO, in caseoflocalpollutionevents (shipemissions) NO2, HCHO, and CHOCHO)

  9. BREDOM – Ny-Ålesund • GOME-2 and SCIAMACHY measurements within 200 km • scatter as result of varying SZA • zenith-sky and nadir AMF are comparable in high latitudes, GOME-2 and SCIAMACHY provide up to 12 measurements per day this facilitates observation of diurnal variation of e.g. NO2 and opens new possibilities for validation

  10. BREDOM – Ny-Ålesund black line: temperature gray-shaded area: potential vorticity Ground-based, satellite and model OClO at the time of overflight of the satellite Excellent agreement, see Oetjen et al., 2009 Ny-Ålesund

  11. BREDOM – Ny-Ålesund

  12. BREDOM – Bremen • Bremen (53° N, 9° E, 30 m asl) • MAX-DOAS since 2000 (2 directions) sinceOctober 2002 scanning • Urban site • Two Acton spectrometerwithRoperCCD‘scovering 325 – 570 nm • Measurementsofozone, NO2, BrO, (OClO), tropospheric NO2, HCHO, CHOCHO

  13. BREDOM – Bremen 1st Workshop on MAX-DOAS observations over East Asia and Russia 8-9 February 2010, Yokohama

  14. BREDOM – Bremen • In situ vs. MAX-DOAS 2010 • Correlation 0.68 • Slope 1.2 • In situ affectedbyinterference?

  15. BREDOM – Heraklion (Crete) • Heraklion (32° N, 25° E, 115 m asl) • MAX-DOAS since 2007 • 2 spectrometer (Acton withRoper-CCD, Orielwith Andor-CCD) covering 325 – 560 nm • Moderatelypolluted • Measurementsofozone, NO2, BrO, tropospheric NO2, HCHO, CHOCHO due tolocalpollutionandbiomassburningplumes

  16. BREDOM – Mérida (Venezuela) • Merida (8° N, 71° W, 4800 asl) • setup in March 2004 • onespectrometercovering 325 – 410 nm • freetroposphereorupperedgeofboundarylayer • measurementsofozone, NO2, and in caseofbiomassburningplumes HCHO

  17. BREDOM – Mérida (Venezuela) HCHO in free troposphere Different viewing angles show different HCHO slant columns -> from that HCHO profiles can be retrieved

  18. BREDOM – Mérida (Venezuela) Formaldehyde volume mixing ratios close to the measurement site in Mérida correlates well with the monthly mean fire counts above the Llanos in Venezuela. Due to the prevailing wind direction (East) air masses from the biomass burning regions could be detected from the MAX-DOAS instrument

  19. BREDOM – Nairobi • Nairobi (1° S, 37° E, 1625 m asl) • MAX-DOAS since 2002 • 2 spectrometer (Orielwith Andor-CCD‘s) covering 325 – 565 nm • Semi-urban, moderate polluted • Measurementsofozone, NO2, BrO, tropospheric NO2, HCHO, CHOCHO due tolocalpollutionandbiomassburningplumes (very rare)

  20. BREDOM – Nairobi Correlation between wind direction and NO2 surface

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