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WP4: African Emissions. M. Van Roozendael , C. Fayt , C. Hermans , G . Pinardi , C. Gielen , F. Hendrick , I . De Smedt BIRA-IASB Prof. Pierre Nzohabonayo , Rachel Akimana , Eugène Nzendako Université du Burundi.

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wp4 african emissions

WP4: African Emissions

M. Van Roozendael, C. Fayt, C. Hermans,

G. Pinardi, C. Gielen, F. Hendrick, I. De Smedt

BIRA-IASB

Prof. Pierre Nzohabonayo, Rachel Akimana,

EugèneNzendako

Université du Burundi

AGACC-II Third Progress Meeting, BIRA-IASB, 18 Dec. 2013

slide2
AGACC-II Tasks in WP 4
  • WP4:African emissions
    • 4.1. Install MAXDOAS instrument in Burundi (Bujumbura)
    • 4.2.Analyse the data for trace gases (NO2, O3, HCHO, glyoxal, SO2, BrO, H2O) and aerosols
    • 4.3. Study transport of biomass burning plumes, and link with measurements at Reunion Island

AGACC-II Third Progress Meeting, BIRA-IASB, 18 Dec. 2013

slide4
Activities in 2013

Bujumbura

(3°S, 30°E)

  • Training of EugèneNzendako (until Feb. 2013)
  • Finalisation and initial calibration of MAXDOAS instrument (until late April 2013)
  • Participation to MADCAT international campaign in Mainz (Germany) for testing and validation of MAXDOAS system (June 2013)
  • Fixing of instrumental problem (Jul-Sep 2013)
  • Final calibration, organisation of transfer to Bujumbura (Oct 2013)
  • Installation: Nov 2013

AGACC-II Third Progress Meeting, BIRA-IASB, 18 Dec. 2013

slide5
Project status 1 year ago (AGACC-II PM2)

MAXDOAS

  • Visit of M. Van Roozendael and C. Hermans in May 2012  identification of suitable location for installation and discussion of critical issues regarding operation and maintenance of instrument
  • Supporting infrastructure in preparation (security, power, internet connection, etc). A dedicated room is being build to host the instrument.
    • Training of local people  ongoing at BIRA (Eugène)

AGACC II Kick-off Meeting, BIRA-IASB, 29 Sep. 2011

slide6
Installation of MAXDOAS and CIMEL systems

CIMEL

  • MAXDOAS and CIMEL sunphotometer installed at University of Bujumbura in November 2013
  • Bothsystemsoperationalsince 25 Nov 2013
  • Daily data transferusingdedicated internet line (but still part of University network)

MAXDOAS

room

BIRA

AGACC-II Third Progress Meeting, BIRA-IASB, 18 Dec. 2013

slide7
Functionaldrawing of the Bujumbura installation

AGACC-II Third Progress Meeting, BIRA-IASB, 18 Dec. 2013

C. Fayt, 2013

slide8
Data acquisition, transfer and processing
  • Sequences of measurements fully automated
    • Control of the different devices (sun tracker, filter wheel, CCD)
    • Sequence of measurements (different elevation angles, dark currents)
    • Automatic adjustment of the integration time
    • Remote control possible in case a problem is detected (VNC)
  • Data are downloaded daily by ftp and raw data are stored at BIRA for further processing
  • Automated processing chain operational
  • Rapid control of the quality of the results through a local web page

AGACC-II Third Progress Meeting, BIRA-IASB, 18 Dec. 2013

slide9
First results – spectral fits

 The instrument performs nominally. NO2, HCHO, O3, H2O, O4 … spectral signatures are detected with high S/N ratio according to specifications.

AGACC-II Third Progress Meeting, BIRA-IASB, 18 Dec. 2013

slide10
First results – slantcolumns

Thick clouds

& rain

HCHO

NO2

O4

 The instrument performs nominally. NO2, HCHO, O3, H2O, O4 … spectral signatures are detected with high S/N ratio according to specifications.

AGACC-II Third Progress Meeting, BIRA-IASB, 18 Dec. 2013

slide11
First inversions for NO2, HCHO and aerosols

Preliminary – no cloud filtering applied yet

AGACC-II Third Progress Meeting, BIRA-IASB, 18 Dec. 2013

slide12
Comparisonwith satellite data (HCHO)

OMI HCHO VCD

  • HCHO columns roughly consistent for GOME-2 (09:30 am) and OMI (01:30)  no diurnal variation?
  • Inter-sensor consistency seems to degrade with time?
  • Small but significant seasonal variation
  • What can we learn from MAXDOAS?

DJF

2007-2009

AGACC-II Third Progress Meeting, BIRA-IASB, 18 Dec. 2013

slide13
Comparisonwith satellite data (HCHO)

AGACC-II Third Progress Meeting, BIRA-IASB, 18 Dec. 2013

slide14
Comparisonwith satellite data (HCHO)

MAXDOAS profiles

Model profiles used in satellite retrievals

AGACC-II Third Progress Meeting, BIRA-IASB, 18 Dec. 2013

slide15
Comparisonwith satellite data (HCHO)

AGACC-II Third Progress Meeting, BIRA-IASB, 18 Dec. 2013

slide16
Comparisonwith satellite data (HCHO)

AGACC-II Third Progress Meeting, BIRA-IASB, 18 Dec. 2013

slide17
Outlook
  • Continued data acquisition and processing of MAXDOAS and CIMEL sunphotometer data throughout 2014 (and later)
  • Continued data exploitation for NO2, HCHO, glyoxal, O3, BrO, aerosols
  • Satellite validation
  • Dispersion modelling
  • Look for PhD support for a scientist in Bujumbura

Thank you to all our colleagues from

the University

of Burundi !

AGACC II Kick-off Meeting, BIRA-IASB, 29 Sep. 2011

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