Michel Van Roozendael

NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 1

BIRA-IASB station report

BIRA-IASB MAXDOAS team

NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 2

• 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 3

BIRA-IASB stationsHarestua (60°N, 11°E); 1994

Haute Provence (44°N, 5°E); 1998

Jungfraujoch (46°N, 8°E); 1990

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

Jungfraujoch station (46°N, 8°E)

NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 4

• SAOZ zenith-sky system operated since 1990– Stratospheric NO2 & O3 column

monitoring NDACC

• New dual-channel MAXDOAS system installed in July 2010– Direct-sun– Zenith-sky twilight– MAXDOAS– Stratospheric NO2, O3 & BrO– Tropospheric NO2, HCHO, aerosol– Additional (TBC): tropospheric

H2O and O3

Harestua station (60°N, 11°E)

NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 5

• Dual channel zenith-sky system operated since 1998– Stratospheric NO2, O3 + BrO and

OClO (chlorine activation)– Long-term trend of BrO

• In preparation:– Installation of new dual channel

zenith-sky system, to be upgraded later with MAXDOAS

– Instrument under testing at BIRA, to be set-up on site in summer 2012

– Overlap operation with old system is planned to minimize risks of discontinuity/bias in the time-series (e.g. BrO)

OHP station (44°N, 5°E)

NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 6

• UV zenith-sky system operated since 1998, with focus on BrO monitoring

• Upgraded in 2005 to allow for MAXDOAS measurements– Stratospheric BrO and NO2

– Tropospheric NO2 and HCHO columns

– System does not allow MAXDOAS profile retrievals (pointing accuracy problems at low elevations)

• New MAXDOAS system in preparation for replacement in 2013

Beijing/Xianghe station (40°N, 115°E)

NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 7

• Dual-channel MAXDOAS system installed in Beijing in summer 2008 during Olympics

• Operated for about 10 months– Tropospheric column 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-term operation– 2 years of successful operation– NO2, HCHO, HONO, glyoxal,

aerosol, SO2, etc– Data exploitation ongoing

Uccle station (51°N, 4.4°E)

NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 8

• Hoffman mini-MAXDOAS system installed at RMI in April 2011

• Operated for about one year as part of AGACC-2 project– Focus on tropospheric NO2 and

aerosol

• Complementary measurements available on site:– CIMEL sunphotometer– Brewer spectrophotometer– Regular ozone and meteo sondes– Ceilometer– In-situ NO2 (from Brussels AQ

network)

Bujumbura station (3°S, 30°E)

NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 9

• New site in project as part of national project AGACC-2

• Dual-channel MAXDOAS system, to be installed 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

• Cooperation with University of Burundi for joint exploitation of the measurements

BIRA-IASB MAXDOAS system

NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 10

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

Spectral coverage and measured species

NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 11

UV channel

VIS channel

O3

SO2

HCHO, HONO

BrO

O4

NO2, glyoxal

O3

O4

O4O4 O2

H2OH2O

Data evaluation tools

NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 12

• QDOAS generic multi-purpose DOAS retrieval tool developed and maintained by

Caroline Fayt cross-platform compatible software written in C/C++ + QT (GUI) large distribution (> 100 users worldwide)

• Uvspec/DISORT radiative transfer tool optimised for twilight stratospheric profile retrievals,

coupled to 1D photochemical box model PSCBox and SLIMCAT for the initialisation (collaboration with M. Chipperfield)

• BePro LIDORT-based MAXDOAS optimal estimation retrieval tool developed by

Katrijn Clémer

• Ongoing development with RT-Solutions (R. Spurr) LIDORT-based twilight tool, with capability to handle 2D photochemical fields,

linearised jacobians, and horizontal averaging kernels

Ongoing projects and plans

NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 13

• 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

Recent publications of the group

NORS/NDACC UV-VIS meeting, Brussels, 3-4 July 2012 14

• 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 Cabauw Intercomparison 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.